Connect with us

Nano Technology

Minimizing thermal conductivity of crystalline material with optimal nanostructure

Avatar

Published

on

Jun 12, 2020 (Nanowerk News) Professor Junichiro Shiomi et al. from The University of Tokyo aimed to reduce the thermal conductivity of semiconductor materials by reducing the internal nanostructure, and successfully minimized thermal conductivity by designing, fabricating, and evaluating the optimal nanostructure-multilayer materials through materials informatics (MI), which combines machine learning and molecular simulation (Physical Review X, “Machine-Learning-Optimized Aperiodic Superlattice Minimizes Coherent Phonon Heat Conduction”). optimum nanostructure designed through materials informatics The optimum nanostructure designed with MI (aperiodic superlattice structure) was actually fabricated, and the optimal performance was verified by assessing its thermal conductivity. Figure: the Actual Structure is the electron microscope image of the fabricated sample. In addition, by further analyzing the phonon transport in the optimal structure, the mechanism that reduces thermal conductivity was clarified. (Image: The University of Tokyo) In 2017, this research group developed a method to design an optimal structure that minimizes or maximizes thermal conductivity via MI based on computational science. However, it has not been experimentally demonstrated, and preparation of nano-scale structures and realization of an optimal structure based on property measurements were desired. Thus, the research group utilized a film deposition method able to regulate, at a molecular level, a superlattice structure wherein two materials were alternately layered at several nm thick, and a measurement method that could assess thermal conductivity of a film at nano-scale, and realized the optimal aperiodic superlattice structure that minimizes thermal conductivity. With the optimal structure, wave interference of the lattice vibration (phonon) that conducts heat was maximized, and thermal conductivity was strongly regulated. In the present study, using the semiconductor lattice structure as the model, the research group verified the utility of the MI method in design, fabrication, assessment, and mechanism elucidation toward regulation of thermal conductivity. In the future, application of the MI method to various material systems is anticipated. It was also shown that optimization of the aperiodic structure can regulate thermal conductivity by fully controlling the wave property of a phonon at near room temperature. This is expected to contribute to developments in phonon engineering for instance in thermoelectric conversion devices, optical sensors, and gas sensors, where low thermal conductivity is needed while maintaining electric conductivity and mechanical properties.

Source: https://feeds.nanowerk.com/~/627096422/0/nanowerk/agwb~Minimizing-thermal-conductivity-of-crystalline-material-with-optimal-nanostructure.php

Nano Technology

A general approach to high-efficiency perovskite solar cells

Avatar

Published

on

Home > Press > A general approach to high-efficiency perovskite solar cells

Researchers from the Institute for Applied Physics (IAP) and the Center for Advancing Electronics Dresden (cfaed) at TU Dresden developed a general methodology for the reproducible fabrication of high efficiency perovskite solar cells. Their study has been published in the renowned journal Nature Communications. CREDIT
Christiane Kunath
Researchers from the Institute for Applied Physics (IAP) and the Center for Advancing Electronics Dresden (cfaed) at TU Dresden developed a general methodology for the reproducible fabrication of high efficiency perovskite solar cells. Their study has been published in the renowned journal Nature Communications. CREDIT
Christiane Kunath

Abstract:
Perovskites, a class of materials first reported in the early 19th century, were “re-discovered” in 2009 as a possible candidate for power generation via their use in solar cells. Since then, they have taken the photovoltaic (PV) research community by storm, reaching new record efficiencies at an unprecedented pace. This improvement has been so rapid that by 2021, barely more than a decade of research later, they are already achieving performance similar to conventional silicon devices. What makes perovskites especially promising is the manner in which they can be created. Where silicon-based devices are heavy and require high temperatures for fabrication, perovskite devices can be lightweight and formed with minimal energy investiture. It is this combination – high performance and facile fabrication – which has excited the research community.

A general approach to high-efficiency perovskite solar cells


Dresden, Germany | Posted on April 1st, 2021

As the performance of perovskite photovoltaics rocketed upward, left behind were some of the supporting developments needed to make a commercially viable technology. One issue that continues to plague perovskite development is device reproducibility. While some PV devices can be made with the desired level of performance, others made in the exact same manner often have significantly lower efficiencies, puzzling and frustrating the research community.

Recently, researchers from the Emerging Electronic Technologies Group of Prof. Yana Vaynzof have identified that fundamental processes that occur during the perovskite film formation strongly influence the reproducibility of the photovoltaic devices. When depositing the perovskite layer from solution, an antisolvent is dripped onto the perovskite solution to trigger its crystallization. “We found that the duration for which the perovskite was exposed to the antisolvent had a dramatic impact on the final device performance, a variable which had, until now, gone unnoticed in the field.” says Dr. Alexander Taylor, a postdoctoral research associate in the Vaynzof group and the first author on the study. “This is related to the fact that certain antisolvents may at least partly dissolve the precursors of the perovskite layer, thus altering its final composition. Additionally, the miscibility of antisolvents with the perovskite solution solvents influences their efficacy in triggering crystallization.”

These results reveal that, as researchers fabricate their PV devices, differences in this antisolvent step could cause the observed irreproducibility in performance. Going further, the authors tested a wide range of potential antisolvents, and showed that by controlling for these phenomena, they could obtain cutting-edge performance from nearly every candidate tested. “By identifying the key antisolvent characteristics that influence the quality of the perovskite active layers, we are also able to predict the optimal processing for new antisolvents, thus eliminating the need for the tedious trial-and-error optimization so common in the field.” adds Dr. Fabian Paulus, leader of the Transport in Hybrid Materials Group at cfaed and a contributor to the study.

“Another important aspect of our study is the fact that we demonstrate how an optimal application of an antisolvent can significantly widen the processibility window of perovskite photovoltaic devices” notes Prof. Vaynzof, who led the work. “Our results offer the perovskite research community valuable insights necessary for the advancement of this promising technology into a commercial product.”

####

For more information, please click here

Contacts:
Yana Vaynzof
49-351-463-42132

@tudresden_de

Copyright © TU Dresden

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

The results were published in the prestigious journal Nature Communications.

Related News Press

News and information

Plasmon-coupled gold nanoparticles useful for thermal history sensing April 1st, 2021

Oxford Instruments Asylum Research Releases Variable Magnetic Field Module accessory for Jupiter XR, Large Sample Atomic Force Microscope March 26th, 2021

Controlling bubble formation on electrodes: Study finds the wettability of porous electrode surfaces is key to making efficient water-splitting or carbon-capturing systems March 26th, 2021

180 Degree Capital Corp. Issues Second Open Letter to the Board and Shareholders of Enzo Biochem, Inc. March 26th, 2021

Perovskites

Shedding light on perovskite films: Efficient materials for future solar cells – New model to determine photoluminescence quantum efficiency March 16th, 2021

Use of perovskite will be a key feature of the next generation of electronic appliances: Nanomaterials of perovskite dispersed in hexane and irradiated by laser; light emission by these materials is intense thanks to resistance to surface defects March 12th, 2021

Researchers improve efficiency of next-generation solar cell material: Reducing internal losses could pave the way to low-cost perovskite-based photovoltaics that match silicon cells’ output February 26th, 2021

Squeezing a rock-star material could make it stable enough for solar cells: A promising lead halide perovskite is great at converting sunlight to electricity, but it breaks down at room temperature; now scientists have discovered how to stabilize it with pressure from a diamond a January 22nd, 2021

Possible Futures

Plasmon-coupled gold nanoparticles useful for thermal history sensing April 1st, 2021

Oxford Instruments Asylum Research Releases Variable Magnetic Field Module accessory for Jupiter XR, Large Sample Atomic Force Microscope March 26th, 2021

Controlling bubble formation on electrodes: Study finds the wettability of porous electrode surfaces is key to making efficient water-splitting or carbon-capturing systems March 26th, 2021

180 Degree Capital Corp. Issues Second Open Letter to the Board and Shareholders of Enzo Biochem, Inc. March 26th, 2021

Discoveries

Plasmon-coupled gold nanoparticles useful for thermal history sensing April 1st, 2021

DNA–Metal double helix: Single-stranded DNA as supramolecular template for highly organized palladium nanowires March 26th, 2021

Design could enable longer lasting, more powerful lithium batteries: Use of a novel electrolyte could allow advanced metal electrodes and higher voltages, boosting capacity and cycle life March 26th, 2021

Controlling bubble formation on electrodes: Study finds the wettability of porous electrode surfaces is key to making efficient water-splitting or carbon-capturing systems March 26th, 2021

Announcements

Plasmon-coupled gold nanoparticles useful for thermal history sensing April 1st, 2021

Oxford Instruments Asylum Research Releases Variable Magnetic Field Module accessory for Jupiter XR, Large Sample Atomic Force Microscope March 26th, 2021

Controlling bubble formation on electrodes: Study finds the wettability of porous electrode surfaces is key to making efficient water-splitting or carbon-capturing systems March 26th, 2021

180 Degree Capital Corp. Issues Second Open Letter to the Board and Shareholders of Enzo Biochem, Inc. March 26th, 2021

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers/Posters

Plasmon-coupled gold nanoparticles useful for thermal history sensing April 1st, 2021

DNA–Metal double helix: Single-stranded DNA as supramolecular template for highly organized palladium nanowires March 26th, 2021

Pressure sensor with high sensitivity and linear response based on soft micropillared electrodes March 26th, 2021

Design could enable longer lasting, more powerful lithium batteries: Use of a novel electrolyte could allow advanced metal electrodes and higher voltages, boosting capacity and cycle life March 26th, 2021

Energy

Controlling bubble formation on electrodes: Study finds the wettability of porous electrode surfaces is key to making efficient water-splitting or carbon-capturing systems March 26th, 2021

Shedding light on perovskite films: Efficient materials for future solar cells – New model to determine photoluminescence quantum efficiency March 16th, 2021

Use of perovskite will be a key feature of the next generation of electronic appliances: Nanomaterials of perovskite dispersed in hexane and irradiated by laser; light emission by these materials is intense thanks to resistance to surface defects March 12th, 2021

Scientists stabilize atomically thin boron for practical use March 12th, 2021

Solar/Photovoltaic

Shedding light on perovskite films: Efficient materials for future solar cells – New model to determine photoluminescence quantum efficiency March 16th, 2021

Scientists stabilize atomically thin boron for practical use March 12th, 2021

Researchers improve efficiency of next-generation solar cell material: Reducing internal losses could pave the way to low-cost perovskite-based photovoltaics that match silicon cells’ output February 26th, 2021

Squeezing a rock-star material could make it stable enough for solar cells: A promising lead halide perovskite is great at converting sunlight to electricity, but it breaks down at room temperature; now scientists have discovered how to stabilize it with pressure from a diamond a January 22nd, 2021

Coinsmart. Beste Bitcoin-Börse in Europa
Source: http://www.nanotech-now.com/news.cgi?story_id=56624

Continue Reading

Nano Technology

Plasmon-coupled gold nanoparticles useful for thermal history sensing

Avatar

Published

on

Home > Press > Plasmon-coupled gold nanoparticles useful for thermal history sensing

Peak wavelength of the polarized optical extinction spectrum as a function of the recovery temperature, showing the temperature-dependent behavior that can be applied for optical thermal-history sensors. Image credit: Mehedi H. Rizvi.
Peak wavelength of the polarized optical extinction spectrum as a function of the recovery temperature, showing the temperature-dependent behavior that can be applied for optical thermal-history sensors. Image credit: Mehedi H. Rizvi.

Abstract:
Researchers have demonstrated that stretching shape-memory polymers embedded with clusters of gold nanoparticles alters their plasmon-coupling, giving rise to desirable optical properties. One potential application for the material is a sensor that relies on optical properties to track an object or environment’s thermal history.

Plasmon-coupled gold nanoparticles useful for thermal history sensing


Durham, NC | Posted on April 1st, 2021

At issue is a stretchable polymer embedded with gold nanospheres. If the material is heated and stretched, followed by cooling to room temperature, the material will hold its stretched shape indefinitely. Once reheated to 120 degrees Celsius, the material returns to its original shape.

But what’s really interesting is that the gold nanospheres are not perfectly dispersed in the polymer. Instead, they form clusters, in which their surface plasmon resonances are coupled. These plasmon-coupled nanoparticles have optical properties that shift depending on how close they are to each other, which changes when stretching alters the shape of the composite.

“When assessing the peak wavelength of light absorbed by the material, there are significant differences depending on whether the light is polarized parallel or perpendicular to the stretching direction,” says Joe Tracy, corresponding author of a paper on the work and a professor of materials science and engineering at NC State. “For light polarized parallel to the direction of stretching, the further you have stretched the material, the further the light absorbed shifts to the red. For light polarized perpendicular to the stretching direction there is a blueshift.”

“We also found that, while the shape-memory polymer holds its shape at room temperature, it recovers its original shape in a predictable way, depending on the temperature it is exposed to,” says Tobias Kraus, co-author of the paper, a group leader at the Leibniz Institute for New Materials and a professor at Saarland University.

Specifically, once stretched 140% past its original length, you can determine the highest temperature to which the polymer is then exposed, up to 120 degrees Celsius, by measuring how much it has shrunk back toward its original size. What’s more, because of the plasmon-coupled nanoparticles, this change can be measured indirectly, through measurements of the material’s optical properties.

“From a practical perspective, this allows you to create an optical thermal-history sensor,” Joe Tracy says. “You can use light to see how hot the material got. An important application of thermal-history sensors is assuring the quality or safety of shipping or storing materials that are sensitive to significant changes in heat. We have demonstrated an approach based on plasmon coupling of gold nanoparticles.”

The sensor concept was developed empirically, but the researchers also used computational modeling to better understand the structure of the clusters of gold nanospheres and how the clusters changed during stretching. The strength of plasmon coupling is related to the spacings between nanospheres, which is known as a “plasmon ruler.”

“Based on our simulations, we can estimate the distance between plasmon-coupled nanoparticles from their optical properties,” says Amy Oldenburg, co-author of the paper and a professor of physics at the University of North Carolina at Chapel Hill. “This comparison is informative for designing future polymer nanocomposites based on plasmon-coupled nanoparticles.”

####

For more information, please click here

Contacts:
Matt Shipman

@NCStateNews

Copyright © North Carolina State University

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

The paper, “Plasmon-Coupled Gold Nanoparticles in Stretched Shape-Memory Polymers for Mechanical/Thermal Sensing,” appears in the journal ACS Applied Nano Materials. First author of the paper is Prachi Yadav, a former graduate student at NC State. The paper was co-authored by Mehedi Rizvi, Sumeet Mishra, Brian Chapman and Brian Lynch of NC State; and Björn Kuttich of the Leibniz Institute for New Materials.

Related News Press

News and information

A general approach to high-efficiency perovskite solar cells April 1st, 2021

Oxford Instruments Asylum Research Releases Variable Magnetic Field Module accessory for Jupiter XR, Large Sample Atomic Force Microscope March 26th, 2021

Controlling bubble formation on electrodes: Study finds the wettability of porous electrode surfaces is key to making efficient water-splitting or carbon-capturing systems March 26th, 2021

180 Degree Capital Corp. Issues Second Open Letter to the Board and Shareholders of Enzo Biochem, Inc. March 26th, 2021

Govt.-Legislation/Regulation/Funding/Policy

Pressure sensor with high sensitivity and linear response based on soft micropillared electrodes March 26th, 2021

Design could enable longer lasting, more powerful lithium batteries: Use of a novel electrolyte could allow advanced metal electrodes and higher voltages, boosting capacity and cycle life March 26th, 2021

Controlling bubble formation on electrodes: Study finds the wettability of porous electrode surfaces is key to making efficient water-splitting or carbon-capturing systems March 26th, 2021

Fast-acting, color-changing molecular probe senses when a material is about to fail March 25th, 2021

Possible Futures

A general approach to high-efficiency perovskite solar cells April 1st, 2021

Oxford Instruments Asylum Research Releases Variable Magnetic Field Module accessory for Jupiter XR, Large Sample Atomic Force Microscope March 26th, 2021

Controlling bubble formation on electrodes: Study finds the wettability of porous electrode surfaces is key to making efficient water-splitting or carbon-capturing systems March 26th, 2021

180 Degree Capital Corp. Issues Second Open Letter to the Board and Shareholders of Enzo Biochem, Inc. March 26th, 2021

Sensors

Pressure sensor with high sensitivity and linear response based on soft micropillared electrodes March 26th, 2021

Scientists stabilize atomically thin boron for practical use March 12th, 2021

Compression or strain – the material expands always the same March 10th, 2021

CEA-Leti Announces 16 Papers to Be Presented At Photonics West 2021 and a Virtual Workshop on March 25 March 3rd, 2021

Discoveries

A general approach to high-efficiency perovskite solar cells April 1st, 2021

DNA–Metal double helix: Single-stranded DNA as supramolecular template for highly organized palladium nanowires March 26th, 2021

Design could enable longer lasting, more powerful lithium batteries: Use of a novel electrolyte could allow advanced metal electrodes and higher voltages, boosting capacity and cycle life March 26th, 2021

Controlling bubble formation on electrodes: Study finds the wettability of porous electrode surfaces is key to making efficient water-splitting or carbon-capturing systems March 26th, 2021

Announcements

A general approach to high-efficiency perovskite solar cells April 1st, 2021

Oxford Instruments Asylum Research Releases Variable Magnetic Field Module accessory for Jupiter XR, Large Sample Atomic Force Microscope March 26th, 2021

Controlling bubble formation on electrodes: Study finds the wettability of porous electrode surfaces is key to making efficient water-splitting or carbon-capturing systems March 26th, 2021

180 Degree Capital Corp. Issues Second Open Letter to the Board and Shareholders of Enzo Biochem, Inc. March 26th, 2021

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers/Posters

A general approach to high-efficiency perovskite solar cells April 1st, 2021

DNA–Metal double helix: Single-stranded DNA as supramolecular template for highly organized palladium nanowires March 26th, 2021

Pressure sensor with high sensitivity and linear response based on soft micropillared electrodes March 26th, 2021

Design could enable longer lasting, more powerful lithium batteries: Use of a novel electrolyte could allow advanced metal electrodes and higher voltages, boosting capacity and cycle life March 26th, 2021

Coinsmart. Beste Bitcoin-Börse in Europa
Source: http://www.nanotech-now.com/news.cgi?story_id=56625

Continue Reading

Nano Technology

Oxford Instruments Asylum Research Releases Variable Magnetic Field Module accessory for Jupiter XR, Large Sample Atomic Force Microscope

Avatar

Published

on

Home > Press > Oxford Instruments Asylum Research Releases Variable Magnetic Field Module accessory for Jupiter XR, Large Sample Atomic Force Microscope

Abstract:
Oxford Instruments Asylum Research announces the release of the Variable Field Module (VFM) accessory for the Jupiter XR atomic force microscope (AFM). The adjustable magnetic field enabled by the VFM accessory is useful for applications such as imaging the domain reversal behaviour of ferromagnetic thin films, studying magnetic field dependent resistance in sensor devices, or imaging magnetic particles. This Asylum Research exclusive accessory can be configured for the magnetic field to be applied either in-plane with the sample or out-of-plane. “The VFM accessory is unique to Asylum Research AFMs and will enable researchers to increase their knowledge of ferromagnetic and piezoelectric materials,” commented Dr. Jason Li, Applications Scientist manager at Oxford Instruments Asylum Research.

Oxford Instruments Asylum Research Releases Variable Magnetic Field Module accessory for Jupiter XR, Large Sample Atomic Force Microscope


Santa Barbara, CA | Posted on March 26th, 2021

Asylum Research AFMs are widely used across many different industrial and academic research fields including energy storage, polymers, semiconductors and 2D materials. The Jupiter XR is a large-sample AFM that can accommodate samples up to 200 millimeters in diameter and inspect areas up to 100×100 microns while still delivering ultra-high resolution and high throughput, with typical images requiring 1 minute to acquire.

– End –

Issued for and on behalf of Oxford Instruments Asylum Research Inc.

####

About Oxford Instruments Asylum Research
Oxford Instruments Asylum Research is the technology leader in atomic force microscopy for both materials and bioscience research. Asylum Research AFMs are widely used by both academic and industrial researchers for characterizing samples from diverse fields spanning material science, polymers, thin films, energy research, and biophysics. In addition to routine imaging of sample topography and roughness, Asylum Research AFMs also offer unmatched resolution and quantitative measurement capability for nanoelectrical, nanomechanical and electromechanical characterization. Recent advances have made these measurements far simpler and more automated for increased consistency and productivity. Its Cypher™, MFP-3D™, and Jupiter™ AFM product lines span a wide range of performance and budgets. Asylum Research also offers a comprehensive selection of AFM probes, accessories, and consumables. Sales, applications and service offices are located in the United States, Germany, United Kingdom, Japan, France, India, China and Taiwan, with distributor offices in other global regions.

About Oxford Instruments plc

Oxford Instruments designs, supplies and supports high-technology tools and systems with a focus on research and industrial applications. Innovation has been the driving force behind Oxford Instruments’ growth and success for 60 years, supporting its core purpose to address some of the world’s most pressing challenges.

The first technology business to be spun out from Oxford University, Oxford Instruments is now a global company and is listed on the FTSE250 index of the London Stock Exchange (OXIG). Its strategy focuses on being a customer-centric, market-focused Group, understanding the technical and commercial challenges faced by its customers. Key market segments include Semiconductor & Communications, Advanced Materials, Healthcare & Life Science, and Quantum Technology.

Their portfolio includes a range of core technologies in areas such as low temperature and high magnetic field environments; Nuclear Magnetic Resonance; X-ray, electron, laser and optical based metrology; atomic force microscopy; optical imaging; and advanced growth, deposition and etching.

Oxford Instruments is helping enable a greener economy, increased connectivity, improved health and leaps in scientific understanding. Their advanced products and services allow the world’s leading industrial companies and scientific research communities to image, analyze and manipulate materials down to the atomic and molecular level, helping to accelerate R&D, increase manufacturing productivity and make ground-breaking discoveries.

For more information, please click here

Contacts:
Dominic Paszkeicz

Oxford Instruments Asylum Research Inc.
+1-805-696-6467

Copyright © Oxford Instruments Asylum Research

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Pressure sensor with high sensitivity and linear response based on soft micropillared electrodes March 26th, 2021

INBRAIN Neuroelectronics raises over €14M to develop smart graphene-based neural implants for personalised therapies in brain disorders March 26th, 2021

Controlling bubble formation on electrodes: Study finds the wettability of porous electrode surfaces is key to making efficient water-splitting or carbon-capturing systems March 26th, 2021

180 Degree Capital Corp. Issues Second Open Letter to the Board and Shareholders of Enzo Biochem, Inc. March 26th, 2021

2 Dimensional Materials

INBRAIN Neuroelectronics raises over €14M to develop smart graphene-based neural implants for personalised therapies in brain disorders March 26th, 2021

Nanotech scientists create world’s smallest origami bird March 17th, 2021

Imaging

Bruker Light-Sheet Microscopes at Major Comprehensive Cancer Center: New Advanced Imaging Center Powered by Two MuVi and LCS SPIM Microscopes March 25th, 2021

Microscope that detects individual viruses could power rapid diagnostics March 19th, 2021

Targeting Cancer Detection & Identification of Microorganisms, CEA-Leti Develops Mid-Infrared, Spectral-Imaging Technique: Presentations at Photonics West 2021 Show How Early-Stage Imaging System’s Flexibility Can Be Applied Broadly in Medical Field March 18th, 2021

Possible Futures

INBRAIN Neuroelectronics raises over €14M to develop smart graphene-based neural implants for personalised therapies in brain disorders March 26th, 2021

Design could enable longer lasting, more powerful lithium batteries: Use of a novel electrolyte could allow advanced metal electrodes and higher voltages, boosting capacity and cycle life March 26th, 2021

Controlling bubble formation on electrodes: Study finds the wettability of porous electrode surfaces is key to making efficient water-splitting or carbon-capturing systems March 26th, 2021

180 Degree Capital Corp. Issues Second Open Letter to the Board and Shareholders of Enzo Biochem, Inc. March 26th, 2021

Chip Technology

Teamwork makes light shine ever brighter: Combined energy sources return a burst of photons from plasmonic gold nanogaps March 18th, 2021

Remote control for quantum emitters:Novel approach could become a asset in quantum computers and quantum simulation March 12th, 2021

Scientists build the smallest cable containing a spin switch March 12th, 2021

GLOBALFOUNDRIES 22FDX RF Solution Provides the Basis for Next-Gen mmWave Automotive Radar: Next-generation auto radar technology, based on GF’s 22FDX RF solution, will help make vehicles smarter and roads even safer than today March 10th, 2021

Announcements

INBRAIN Neuroelectronics raises over €14M to develop smart graphene-based neural implants for personalised therapies in brain disorders March 26th, 2021

Design could enable longer lasting, more powerful lithium batteries: Use of a novel electrolyte could allow advanced metal electrodes and higher voltages, boosting capacity and cycle life March 26th, 2021

Controlling bubble formation on electrodes: Study finds the wettability of porous electrode surfaces is key to making efficient water-splitting or carbon-capturing systems March 26th, 2021

180 Degree Capital Corp. Issues Second Open Letter to the Board and Shareholders of Enzo Biochem, Inc. March 26th, 2021

Tools

Bruker Light-Sheet Microscopes at Major Comprehensive Cancer Center: New Advanced Imaging Center Powered by Two MuVi and LCS SPIM Microscopes March 25th, 2021

Izon Science launches the Exoid to transform nanoparticle measurement: The semi-automated Exoid device uses new-generation Tunable Resistive Pulse Sensing (TRPS) technology, enabling the measurement of complex nano-particle size, concentration, and charge – with unparalleled prec March 23rd, 2021

Microscope that detects individual viruses could power rapid diagnostics March 19th, 2021

Targeting Cancer Detection & Identification of Microorganisms, CEA-Leti Develops Mid-Infrared, Spectral-Imaging Technique: Presentations at Photonics West 2021 Show How Early-Stage Imaging System’s Flexibility Can Be Applied Broadly in Medical Field March 18th, 2021

Industrial

New technique builds super-hard metals from nanoparticles January 22nd, 2021

CEA-Leti Papers at IEDM 2020 Highlight Progress in Overcoming Challenges to Making GaN Energy-Saving, Power-Electronics Devices: Gallium Nitride Seen as Highly Efficient Replacement for Silicon In Wide Range of Consumer and Industrial Uses December 17th, 2020

Nanomaterials enable dual-mode heating and cooling device: Device could cut HVAC energy use by nearly 20% in the US December 2nd, 2020

Industrial-strength brine, meet your kryptonite: Boron nitride coating is key ingredient in hypersaline desalination technology November 6th, 2020

Coinsmart. Beste Bitcoin-Börse in Europa
Source: http://www.nanotech-now.com/news.cgi?story_id=56618

Continue Reading

Nano Technology

Design could enable longer lasting, more powerful lithium batteries: Use of a novel electrolyte could allow advanced metal electrodes and higher voltages, boosting capacity and cycle life

Avatar

Published

on

Home > Press > Design could enable longer lasting, more powerful lithium batteries: Use of a novel electrolyte could allow advanced metal electrodes and higher voltages, boosting capacity and cycle life

X-ray tomography images taken at Brookhaven National Lab show cracking of a particle in one electrode of a battery cell that used a conventional electrolyte (as seen on the left). The researchers found that using a novel electrolyte prevented most of this cracking (right).
Credits:Image: courtesy of the researchers
X-ray tomography images taken at Brookhaven National Lab show cracking of a particle in one electrode of a battery cell that used a conventional electrolyte (as seen on the left). The researchers found that using a novel electrolyte prevented most of this cracking (right).
Credits:Image: courtesy of the researchers

Abstract:
Lithium-ion batteries have made possible the lightweight electronic devices whose portability we now take for granted, as well as the rapid expansion of electric vehicle production. But researchers around the world are continuing to push limits to achieve ever-greater energy densities — the amount of energy that can be stored in a given mass of material — in order to improve the performance of existing devices and potentially enable new applications such as long-range drones and robots.

Design could enable longer lasting, more powerful lithium batteries: Use of a novel electrolyte could allow advanced metal electrodes and higher voltages, boosting capacity and cycle life


Cambridge, MA | Posted on March 26th, 2021

One promising approach is the use of metal electrodes in place of the conventional graphite, with a higher charging voltage in the cathode. Those efforts have been hampered, however, by a variety of unwanted chemical reactions that take place with the electrolyte that separates the electrodes. Now, a team of researchers at MIT and elsewhere has found a novel electrolyte that overcomes these problems and could enable a significant leap in the power-per-weight of next-generation batteries, without sacrificing the cycle life.

The research is reported today in the journal Nature Energy in a paper by MIT professors Ju Li, Yang Shao-Horn, and Jeremiah Johnson; postdoc Weijiang Xue; and 19 others at MIT, two national laboratories, and elsewhere. The researchers say the finding could make it possible for lithium-ion batteries, which now typically can store about 260 watt-hours per kilogram, to store about 420 watt-hours per kilogram. That would translate into longer ranges for electric cars and longer-lasting changes on portable devices.

The basic raw materials for this electrolyte are inexpensive (though one of the intermediate compounds is still costly because it’s in limited use), and the process to make it is simple. So, this advance could be implemented relatively quickly, the researchers say.

The electrolyte itself is not new, explains Johnson, a professor of chemistry. It was developed a few years ago by some members of this research team, but for a different application. It was part of an effort to develop lithium-air batteries, which are seen as the ultimate long-term solution for maximizing battery energy density. But there are many obstacles still facing the development of such batteries, and that technology may still be years away. In the meantime, applying that electrolyte to lithium-ion batteries with metal electrodes turns out to be something that can be achieved much more quickly.

The new application of this electrode material was found “somewhat serendipitously,” after it had initially been developed a few years ago by Shao-Horn, Johnson, and others, in a collaborative venture aimed at lithium-air battery development.

“There’s still really nothing that allows a good rechargeable lithium-air battery,” Johnson says. However, “we designed these organic molecules that we hoped might confer stability, compared to the existing liquid electrolytes that are used.” They developed three different sulfonamide-based formulations, which they found were quite resistant to oxidation and other degradation effects. Then, working with Li’s group, postdoc Xue decided to try this material with more standard cathodes instead.

The type of battery electrode they have now used with this electrolyte, a nickel oxide containing some cobalt and manganese, “is the workhorse of today’s electric vehicle industry,” says Li, who is a professor of nuclear science and engineering and materials science and engineering.

Because the electrode material expands and contracts anisotropically as it gets charged and discharged, this can lead to cracking and a breakdown in performance when used with conventional electrolytes. But in experiments in collaboration with Brookhaven National Laboratory, the researchers found that using the new electrolyte drastically reduced these stress-corrosion cracking degradations.

The problem was that the metal atoms in the alloy tended to dissolve into the liquid electrolyte, losing mass and leading to cracking of the metal. By contrast, the new electrolyte is extremely resistant to such dissolution. Looking at the data from the Brookhaven tests, Li says, it was “sort of shocking to see that, if you just change the electrolyte, then all these cracks are gone.” They found that the morphology of the electrolyte material is much more robust, and the transition metals “just don’t have as much solubility” in these new electrolytes.

That was a surprising combination, he says, because the material still readily allows lithium ions to pass through — the essential mechanism by which batteries get charged and discharged — while blocking the other cations, known as transition metals, from entering. The accumulation of unwanted compounds on the electrode surface after many charging-discharging cycles was reduced more than tenfold compared to the standard electrolyte.

“The electrolyte is chemically resistant against oxidation of high-energy nickel-rich materials, preventing particle fracture and stabilizing the positive electrode during cycling,” says Shao-Horn, a professor of mechanical engineering and materials science and engineering. “The electrolyte also enables stable and reversible stripping and plating of lithium metal, an important step toward enabling rechargeable lithium-metal batteries with energy two times that of the state-the-art lithium-ion batteries. This finding will catalyze further electrolyte search and designs of liquid electrolytes for lithium-metal batteries rivaling those with solid state electrolytes.”

The next step is to scale the production to make it affordable. “We make it in one very easy reaction from readily available commercial starting materials,” Johnson says. Right now, the precursor compound used to synthesize the electrolyte is expensive, but he says, “I think if we can show the world that this is a great electrolyte for consumer electronics, the motivation to further scale up will help to drive the price down.”

Because this is essentially a “drop in” replacement for an existing electrolyte and doesn’t require redesign of the entire battery system, Li says, it could be implemented quickly and could be commercialized within a couple of years. “There’s no expensive elements, it’s just carbon and fluorine. So it’s not limited by resources, it’s just the process,” he says.

The research was supported by the U.S. Department of Energy and the National Science Foundation, and made use of facilities at Brookhaven National Laboratory and Argonne National Laboratory.

####

For more information, please click here

Contacts:
Abby Abazorius
MIT News Office
617.253.2709

Copyright © Massachusetts Institute of Technology

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

Paper: “Ultra-high-voltage Ni-rich layered cathodes in practical Li metal batteries enabled by a sulfonamide-based electrolyte.”:

Related News Press

News and information

Pressure sensor with high sensitivity and linear response based on soft micropillared electrodes March 26th, 2021

INBRAIN Neuroelectronics raises over €14M to develop smart graphene-based neural implants for personalised therapies in brain disorders March 26th, 2021

Oxford Instruments Asylum Research Releases Variable Magnetic Field Module accessory for Jupiter XR, Large Sample Atomic Force Microscope March 26th, 2021

Controlling bubble formation on electrodes: Study finds the wettability of porous electrode surfaces is key to making efficient water-splitting or carbon-capturing systems March 26th, 2021

180 Degree Capital Corp. Issues Second Open Letter to the Board and Shareholders of Enzo Biochem, Inc. March 26th, 2021

Graphene/ Graphite

INBRAIN Neuroelectronics raises over €14M to develop smart graphene-based neural implants for personalised therapies in brain disorders March 26th, 2021

A new industry standard for batteries: ultra-clean facility for graphene nanotube dispersions March 19th, 2021

Scientists stabilize atomically thin boron for practical use March 12th, 2021

Laboratories

Advancement creates nanosized, foldable robots March 19th, 2021

Building tough 3D nanomaterials with DNA: Columbia Engineers use DNA nanotechnology to create highly resilient synthetic nanoparticle-based materials that can be processed through conventional nanofabrication methods March 19th, 2021

Govt.-Legislation/Regulation/Funding/Policy

Pressure sensor with high sensitivity and linear response based on soft micropillared electrodes March 26th, 2021

Controlling bubble formation on electrodes: Study finds the wettability of porous electrode surfaces is key to making efficient water-splitting or carbon-capturing systems March 26th, 2021

Fast-acting, color-changing molecular probe senses when a material is about to fail March 25th, 2021

Microscope that detects individual viruses could power rapid diagnostics March 19th, 2021

Possible Futures

INBRAIN Neuroelectronics raises over €14M to develop smart graphene-based neural implants for personalised therapies in brain disorders March 26th, 2021

Oxford Instruments Asylum Research Releases Variable Magnetic Field Module accessory for Jupiter XR, Large Sample Atomic Force Microscope March 26th, 2021

Controlling bubble formation on electrodes: Study finds the wettability of porous electrode surfaces is key to making efficient water-splitting or carbon-capturing systems March 26th, 2021

180 Degree Capital Corp. Issues Second Open Letter to the Board and Shareholders of Enzo Biochem, Inc. March 26th, 2021

Discoveries

DNA–Metal double helix: Single-stranded DNA as supramolecular template for highly organized palladium nanowires March 26th, 2021

Pressure sensor with high sensitivity and linear response based on soft micropillared electrodes March 26th, 2021

INBRAIN Neuroelectronics raises over €14M to develop smart graphene-based neural implants for personalised therapies in brain disorders March 26th, 2021

Controlling bubble formation on electrodes: Study finds the wettability of porous electrode surfaces is key to making efficient water-splitting or carbon-capturing systems March 26th, 2021

Announcements

INBRAIN Neuroelectronics raises over €14M to develop smart graphene-based neural implants for personalised therapies in brain disorders March 26th, 2021

Oxford Instruments Asylum Research Releases Variable Magnetic Field Module accessory for Jupiter XR, Large Sample Atomic Force Microscope March 26th, 2021

Controlling bubble formation on electrodes: Study finds the wettability of porous electrode surfaces is key to making efficient water-splitting or carbon-capturing systems March 26th, 2021

180 Degree Capital Corp. Issues Second Open Letter to the Board and Shareholders of Enzo Biochem, Inc. March 26th, 2021

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers/Posters

DNA–Metal double helix: Single-stranded DNA as supramolecular template for highly organized palladium nanowires March 26th, 2021

Pressure sensor with high sensitivity and linear response based on soft micropillared electrodes March 26th, 2021

Fast-acting, color-changing molecular probe senses when a material is about to fail March 25th, 2021

Microscope that detects individual viruses could power rapid diagnostics March 19th, 2021

Battery Technology/Capacitors/Generators/Piezoelectrics/Thermoelectrics/Energy storage

A new industry standard for batteries: ultra-clean facility for graphene nanotube dispersions March 19th, 2021

Scientists stabilize atomically thin boron for practical use March 12th, 2021

Built to last: New copolymer binder to extend the life of lithium ion batteries: Scientists develop a novel binder material that protects the graphite anode of Li-ion batteries from degradation even after 1700 cycles March 5th, 2021

A COSMIC approach to nanoscale science: Instrument at Berkeley Lab’s Advanced Light Source achieves world-leading resolution of nanomaterials March 5th, 2021

Coinsmart. Beste Bitcoin-Börse in Europa
Source: http://www.nanotech-now.com/news.cgi?story_id=56619

Continue Reading
Esports3 days ago

Free Fire World Series APK Download for Android

Esports1 day ago

C9 White Keiti Blackmail Scandal Explains Sudden Dismissal

Esports3 days ago

Dota 2: Top Mid Heroes of Patch 7.29

Esports1 day ago

Overwatch League 2021 Day 1 Recap

Esports5 days ago

Ludwig Closes Out Month-Long Streaming Marathon in First Place – Weekly Twitch Top 10s, April 5-11

Esports1 day ago

Fortnite: Epic Vaults Rocket Launchers, Cuddlefish & Explosive Bows From Competitive

Esports4 days ago

Position 5 Faceless Void is making waves in North American Dota 2 pubs after patch 7.29

Esports5 days ago

Fortnite Leak Teases Aloy Skin From Horizon Zero Dawn

Esports5 days ago

Fortnite: Patch Notes v16.20 – Off-Road Vehicle Mods, 50-Player Creative Lobbies, Bug Fixes & More

Blockchain5 days ago

Bitcoin Preis steigt auf über 60.000 USD, neues ATH wahrscheinlich

Esports2 days ago

Don’t Miss Out on the Rogue Energy x Esports Talk Giveaway!

Esports3 days ago

Capcom Reveals Ransomware Hack Came from Old VPN

Esports2 days ago

Fortnite: DreamHack Cash Cup Extra Europe & NA East Results

Esports2 days ago

Gamers Club and Riot Games Organize Women’s Valorant Circuit in Latin America

Esports5 days ago

League of Legends’ Patch 11.8 introduces Gwen, champion updates and new Skins

Blockchain5 days ago

Guide to Gambling with Ethereum Now and in the Future

Blockchain5 days ago

ETC Group notiert ersten Litecoin ETP an Deutscher Börse

Esports3 days ago

PSA: CSGO Fans Beware, Unfixed Steam Invite Hack Could Take Over Your PC.

Blockchain5 days ago

COPA verklagt Craig Wright wegen Bitcoin-Copyright

Esports5 days ago

shroud explains why bottom fragging in Valorant is no big deal

Trending