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Vanadium Flow Batteries

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An Interview with Professor Roberts

Dr. Ted Roberts is an internationally recognized expert and innovator in the field of electrochemical technology. He completed his BA (1987), MEng (1988), and PhD (1992) at Cambridge University. Prior to moving to Calgary in 2012, he was a professor at the University of Manchester in the UK, and he is a founder of a successful spin-out company, Arvia Technology Ltd. 

His work has been recognized through several international awards for innovation (the IChemE Water Innovation Award, the IET Innovation Award, and the ACES European Academic Enterprise Award). He is the holder of 22 granted patents, has a further 20 patent applications pending, and has published more than 100 papers in international journals. 

Professor Roberts, thank you for joining us!

Since you are an expert in the field of electrochemical storage technology, we wanted to ask you some questions to understand the technology and its prospects better. So, first, let’s start with

  1. What is electrochemical storage technology?

Electrochemical energy storage devices, commonly known as batteries, store electrical energy in chemicals. Electrochemical devices such as batteries allow the conversion of electrical energy into reactive chemicals, and vice versa. Thus, when a rechargeable battery is charged, electrical energy is converted into chemical energy stored in the battery, and when the battery is discharged, the chemical energy is converted back into electrical energy. 

  1. How does electrochemical storage technology relate to vanadium flow batteries?

Vanadium flow batteries are a type of battery (called a redox flow battery) that stores the chemical energy in liquids that are pumped through the battery when it is charged or discharged. As implied by the name, the chemical energy is stored in vanadium in a number of different forms, which are dissolved in acidified water. 

  1. How does an electrochemical cell produce energy?

Electrical energy requires electrons, and in the electrochemical cell, electrons are transferred from the chemical species to the batteries’ terminals (the electrodes). After a vanadium flow battery is charged, on one side of the battery, the vanadium species have an excess of electrons (at the negative electrode of the battery), and on the other side, the vanadium ions have a shortage of electrons. Thus, when the circuit is completed by connecting the battery’s terminals to each other via an electrical load (e.g., a light bulb, or an electric heater), electrons are pushed from the vanadium species at the negative electrode (which have an excess of electrons) through the circuit to the positive electrode, where they are pulled out by the vanadium species that have shortage of electrons.

  1. What are some factors that influence the performance of vanadium flow batteries and how can these factors be used as an advantage for our future?

A battery can be sized based on two factors: 1) the power that the battery can produce (kW) and 2) the capacity, or amount of energy stored (kWh or kJ). The capacity can also be characterized by the duration of the battery discharge (minutes/hours). The performance of the battery can be characterized by several factors, such as: 

  • The round-trip efficiency: the ratio of the energy recovered during battery discharge to the energy used during charging of the battery.
  • The cycle life: how many times can the battery be charged and discharged before it begins to lose its energy storage capacity.
  • The energy density (kWh/kg): the ratio of the amount of energy stored to the weight (or volume) of the battery.
  • The power density (kW/kg): the ratio of the amount of energy stored to the weight (or volume) of the battery.

An advantage of the vanadium flow battery is that unlike conventional batteries, which store the chemicals inside the battery, the capacity of the battery can be sized independently of the power, simply by having larger tanks for the vanadium where the energy is stored. Vanadium batteries have relatively low energy density, but very long cycle life, and they are also easily recyclable. These advantages make them well suited for applications involving stationary storage of electricity, such as storing solar energy during the day for use after dark. 

  1. How are vanadium flow batteries expected to transform the way energy is stored and generated around the world?

Vanadium batteries will enable more efficient use of electricity by enabling better matching of supply and demand. This will enhance the efficiency and utilization of renewable generation such as solar and wind, as well as conventional generation from fossil fuels and nuclear power. Vanadium flow batteries will likely be used in residential, commercial and industrial buildings, as well as integrated into electricity supply networks. 

  1. Can we talk about the difference between vanadium flow batteries and lithium? There is a lot of confusion between these two technologies. Lithium seems to be the best technology for applications in mobility. What do you see the space for vanadium flow batteries to be?

Lithium batteries are a mature technology — compared to other batteries, they have high energy density and are thus light weight and suitable for portable electronic and transport applications. Vanadium flow batteries have a lower energy density, so are better suited to stationary applications, where the battery does not need to be moved. Lithium batteries store the chemical energy inside the battery electrodes, so to increase the battery capacity, you essentially need more batteries. 

Typically, lithium batteries will discharge at their rated power within a few hours at most. In contrast, vanadium flow batteries can easily be designed with larger capacity (>5 hours) by increasing the size of the tanks used to store the vanadium solutions. Another issue with lithium batteries is their limited cycle life: over time, their performance deteriorates, especially if they are operated at high discharge rates, or deeply discharged. In contrast, vanadium redox flow batteries have a much longer cycle life, and they can be fully discharged without affecting their performance. They are also more easily recycled, and the vanadium solutions can easily be reused at the end of the battery life. Currently, vanadium flow batteries are more expensive than lithium batteries. However, in the long term, the cost of flow batteries can work out cheaper. Lithium batteries are also a more mature technology, and with time, vanadium batteries will become more competitive for stationary energy storage applications. 

  1. Can regional electrical grids integrate intermittent generation sources, such as wind and solar power, without energy storage?

There are other methods to manage intermittent generation on electricity grids without energy storage. One option is to have additional generating capacity, such as gas turbines, available to top up energy supply when demand is greater than supply, either during periods of high demand or when wind and solar generation rates are low. Another strategy is to use large networks, so that regions with excess supply (e.g, where the wind generation is high, or electricity demand is low) can support regions where demand is high or supply is low (e.g., when wind generation is insufficient due to low winds). 

Demand management can also be used — for example, offering domestic and industrial users lower prices at times when there is an excess of supply available. With increasing use of electric vehicles, managing demand for vehicle charging could also be used, and vehicle batteries could also be used as an energy storage resource on electricity networks. Depending on the circumstances, energy storage may be lower cost, offer higher efficiency, and reduce the overall environmental impact, when compared with having additional generation or building larger networks. In practice, it is likely that a combination of energy storage with other options will be used in most circumstances. 

  1. The University of Calgary purchased a vanadium flow battery from StorEn*. Which work will your group perform with the battery?

We plan to use this battery to support our research on vanadium flow battery technology and its integration for electricity supply. We will use the battery to test the scale up of new battery materials technologies that have shown promise at laboratory scale for enhancing vanadium flow battery performance. We are also studying vanadium extraction and purification, and evaluating the impacts of impurities on flow batteries, with the aim of reducing the cost of the vanadium solutions. With this battery, we will be able to demonstrate that lower cost processing routes can be used to produce vanadium solutions that work effectively in the battery. The battery will also be integrated with solar panels, to evaluate battery control technology and the use of lower cost electrical hardware to connect the battery with renewable generation

  1. Can you make any (unbiased) predictions for the future of vanadium flow batteries and their potential for technological advances? 

With the increasing implementation of renewable generation, there is a rapidly growing market for stationary energy storage. Based on the advantages discussed above, vanadium flow batteries are expected to play an increasing role in these applications during the coming decades. The cost of the technology is reducing, and this will be essential for the application of vanadium flow batteries. Reducing cost can be achieved by innovations in battery design and materials to enhance performance and reduce the size and cost of the battery. A secure supply chain for lower cost vanadium suitable for the flow battery technology is also needed.

  1. The battery the University of Calgary purchased from StorEn is the same size as their residential battery. StorEn managed to package this technology in a small scale for residential applications. Do you see any advantages to use vanadium in place of lithium in a residential setting

One concern with lithium batteries is the fire hazard they can present. Vanadium flow batteries are safer, as the energy is stored in water, and so there is no fire risk. In addition, the reliability and stable performance, including with deep discharge, is another advantage for residential applications. The design of small-size vanadium flow batteries with storage capacity of 5 hours or more will likely be attractive for residential applications, especially for integration of local solar generation.

  1. The vanadium electrolyte is reusable — what are the impacts on sustainability and the mining industry?

As mentioned above, vanadium electrolyte is reusable, and the other battery components can also be easily recycled by well-established routes. Vanadium flow batteries are more sustainable than other battery technologies, which are typically difficult to recycle, recycling processes are still under development. Although vanadium electrolyte is reusable, increasing implementation of vanadium flow battery technology will create additional demand for vanadium resources. Currently, vanadium is produced as a by-product of steel production, and the main application for vanadium is in steel alloys. The vanadium price is volatile due to fluctuations in supply and demand, unrelated to the availability and cost of vanadium production. As mentioned above, there is a need for a supply chain for vanadium flow batteries. There is an opportunity to develop a vanadium mining industry targeting production of vanadium for use in flow batteries. There are also wastes that contain significant amounts of vanadium, such as fly ash from combustion of heavy oils, that could easily be processed to produce vanadium for flow batteries. 

Thank you for your time! 

You can learn more about Professor Roberts here.

To learn more, visit Storen.tech.

StorEnTech takes what vanadium batteries already promise – durability and sturdiness – and uses extensive R&D to focus on improving the electrical efficiency of the stack, the energy density of the electrolyte, and the module. Through these processes, the company creates efficient, powerful, environmentally friendly batteries.

*This article is supported by StorEn Technologies. 

 



 


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Source: https://cleantechnica.com/2021/03/19/vanadium-flow-batteries/

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Waymo CEO Krafcik Steps Down — Does It Mean Anything?

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The longtime CEO of Waymo, John Krafcik, has been leading what many consider to be the leading autonomous driving company since 2015 — 6 years. Though, the news is that Krafcik and/or higher-ups at Alphabet decided it was time for him to find a new passion. He is stepping down as CEO and Waymo will now be led by co-CEOs, Dmitri Dolgov, previously Chief Technology Officer (CTO), and Tekedra Mawakana, previously Chief Operating Officer (COO).

The top question is: does this mean anything? Is Krafcik stepping down because he has failed to deliver on key targets? Is commercial rollout going too slowly? Are autonomous capabilities progressing too slowly? Has Krafcik accomplished what he set out to accomplish and is now ready for either new challenges or early retirement?

Notably, Krafcik recently got into a little communications tussle with Tesla. Krafcik claimed that Tesla’s “full self-driving” system isn’t the right approach toward a fully autonomous vehicle. He considers it a dead end.

“It is a misconception that you can simply develop a driver-assistance system further until one day you can magically jump to a fully autonomous driving system,” Krafcik said in an interview with Manager Magazin.

Naturally, Tesla CEO Elon Musk sees it differently. He expects that the only way to get to truly useful self-driving vehicles is through the vision + deep machine learning system it is continuously improving. It must feel like a frantic race to solve a giant puzzle to many of the members of these teams — that’s certainly what it looks like from the outside. With the different approaches, though, it’s not just a race — one of the companies may be putting the puzzle together in the wrong way.

(NNs = neural networks.)

 



 


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Source: https://cleantechnica.com/2021/04/03/waymo-ceo-krafcik-steps-down-does-it-mean-anything/

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The Fossil Fuel Industry Used Deception To Conceal Damage To BIPOC — NAACP Report

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The National Association for the Advancement of Colored People (NAACP) just published a report titled Fossil Fuel Foolery, which identified 10 tactics that the fossil fuel industry used as excuses for not accepting accountability for its impacts on the environment and human health. DesmogBlog noted that the industry used a long list of deceptive tactics that concealed environmental destruction harming Black, Indigenous, and People of Color (BIPOC) as well as low-income communities. Not surprising — the fossil fuel industry only cares about money, and if the planet and human health stand in the way of that, so be it.

The article gave a snapshot of the report findings, and one of the most disturbing things I took notice of was the common tactic that the NAACP described as “co-opt community leaders and organizations and misrepresent the interests and opinions of communities,” sometimes with financial support, to “neutralize or weaken public opposition.”

In short, fossil fuel companies and utilities pour donations on churches, nonprofits, and advocacy organizations to pretty much secure the local community buy-in on projects that generate pollution. The article said it plainly: “to stifle the push towards renewable energy.” And that also includes misrepresenting the community through one or two hired hands.

One example noted in the article is Florida Power & Light’s donation of around $225,000 to the NAACP’s Florida state chapter between 2013 and 2017. Just after these donations, the Florida chapter began repeating industry talking points against the growth of solar energy. This helped accelerate the NAACP’s Initial 2019 report. In addition, the fossil fuel industry and its allies shift the blame onto the very communities affected the most by pollution to distract from the impact of industry operations. This sounds like a narcissistic abuser. Hurt someone and then blame them and convince them it’s their fault.

Last month, President Biden brought attention to a common nickname that encompasses my own city, Cancer Alley. In Louisiana, Cancer Alley is an area along the Mississippi River between Baton Rouge (where I live) and New Orleans — the River Parishes of Louisiana where numerous industrial plants are located. This area has clusters of cancer patients and the constant coverage by the media led to the nickname.

President Biden spoke out about the petrochemical facilities that dump out the large quantities of toxic pollution onto predominantly Black communities, and Senator Bill Cassidy (R-LA) accused the President of slamming our area. Considering Senator Cassidy’s stance in favor of fossil fuels, this isn’t surprising. Earlier this year, President Biden signed executive orders to transform our nation’s heavily fossil-fuel-powered economy into a clean-energy one and paused oil and gas leasing on federal land. President Biden also targeted removing subsidies for those industries. Senator Cassidy and Senator Kennedy spoke out against the President’s orders and in favor of the fossil fuel industry.

“Biden’s executive orders are counterproductive. They eliminate jobs and send them overseas to countries with worse environmental standards, increasing global emissions. We don’t need symbolism — we need solutions. So far, all we are seeing from this administration is an ‘energy’ agenda that betrays the working Americans who thought that this President was going to work for them.” — Senator Bill Cassidy (R-LA)

DeSmogBlog noted that when United Nations human rights official issued a statement last month calling ”the development of petrochemical complexes” in the region “a form of environmental racism,” Senator Cassidy had some words to say about this. It should be noted that Senator Cassidy received around $600,000 in campaign contributions from the oil and gas industry during the 2020 election season. The fossil fuel-addicted senator pointed to obesity and cigarettes as the causes of cancer instead of the rampant pollution.

Late last year, I went down to the riverfront and was fortunate to have had my N95 mask — the chemicals from the plant across the river not only created a haze but made the air foul. That smell was well worse than cigarette smoke. I wrote about it here because it was so striking.

The Top 10 Fossil Fuel Industry Tactics

The NAACP listed the top 10 fossil fuel industry tactics that shift the blame and responsibility of its impact on BIPOC communities. They are as follows:

  1. Invest in efforts that undermine democracy.
  2. Finance political campaigns and pressure politicians.
  3. Fund scientists and scientific research institutions to publish biased research.
  4. Say government regulations hurt the economy and low-income communities.
  5. Deny or understate the harms polluting facilities cause to people and the environment.
  6. Deflect responsibility–shit blame to the communities they pollute.
  7. Co-opt community leaders and organizations and misrepresent the interest and opinions of communities.
  8. Exaggerate the level of job creation and downplay the lack of quality and safety in jobs.
  9. Praise false solutions while claiming that real solutions are impractical, impossible, or harmful for BIPOC and poor communities.
  10. “Embrace” renewables to control the new energy economy.

Some Key Highlights From The Report

The highly detailed report actually has information that is highly disturbing. For example, in 1980, ALEC founder Paul Weyrich stated: “I don’t want everybody to vote. Elections are not won by a majority of people. They never have been from the beginning of our country, and they are not now. As a matter of fact, our leverage in the elections quite candidly goes up as the voting populace goes down.”

In 2010, the Supreme Court’s decision in Citizens United v. Federal Election Commission determined that limited political spending by corporations restricted their constitutional right to freedom of expression. This shifted the political power away from citizens to corporations and special interest groups.

Also, leading up to the 2020 election, the American Petroleum Institute spent over $5 million in lobbying practices. The group funneled money to campaign contributions — mostly financing the Senate Leadership Fund, which is a super PAC that supports the Republican Party. From the report:

“With financial support from the fossil fuel industry, politicians actively support destructive energy practices, falsely claim that emissions, not fossil fuels, are the enemy and draft diluted environmental agendas that focus on planting trees instead of shutting down industrially polluted, cancerous alleys.”

E = MC2: Enviro-lies = Manipulaiton X Ca$h

In this section of the report with the clever above headline, it noted that the Center for American Progress identified over 50 research agreements in a 2010 report. These agreements were between universities and major energy companies, where the companies donated a range between $1 million and $500 million toward energy-related research.

Another example cites a 1997 study by the National Centre for Cancer Institute which found that the chemical benzene, which is found in crude oil and gasoline, was connected to the development of chronic diseases in workers exposed to it. Following this report, several petrochemical companies gave nearly $40 million to fund scientific research “designed to protect member company interests.” One example of this type of research is the Shanghai Research Project which published research that supported the petrochemical companies’ practices.

Fossil Fuel Emissions Kill

The report noted that around 63,000 Americans are killed each year by air pollution and these Americans are disproportionally BIPOC and low-income community residents. Senator Cassidy can blame fat people and cigarettes all day, but it won’t change the fact that 40% of communities of color and low-income communities live within three miles of power plants that emit particulate matter that taints our air quality. Last year when the Exxon plant had that explosion — and, yes, despite what officials said, there were reports of an actual explosion (I was less than five miles away from the explosion) — who knows what was pumped into our air?

You can read the NAACP’s full report here.

 



 


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Source: https://cleantechnica.com/2021/04/02/the-fossil-fuel-industry-used-deception-to-conceal-damage-to-bipoc-naacp-report/

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Reports: Tesla Plans To Start Building 5 Semi Trucks A Week

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Tesla is building a low-volume Tesla Semi production line, and once it’s complete, Tesla reportedly plans to produce 5 Tesla Semi electric trucks on a weekly basis, reports Yahoo! Finance. The article noted that the low-volume production line is being built in a new building in the industrial park where the Nevada Gigafactory is located. Tesla is also still planning for volume production of the Semi trucks to be manufactured at Giga Texas once it’s able to ramp up battery production there.

On Monday, Tesla received a new order for 10 of its Semi EVs along with two Megachargers. Benzinga reported that this was backed with almost $2 million in federal government support. The Mobile Source Air Pollution Review Committee is investing in a clean transportation initiative on California’s southern coast. As a part of this investment, it awarded MXS Leasing LLC, which is a logistics company based in California, $1.8 million for the deployment of 10 Tesla Semi Class 8 semi trucks and an additional $560,000 for the deployment for two overhead electric cranes.

Momentum, the company that assisted MHX with its application for the funding, said that the deal includes two Megachargers at MXH’s Fontana, California, site. Just after that news broke, Tesla’s Elon Musk tweeted that Semi demand isn’t a problem, but that near-term cell supply makes it hard to scale the Semi. He also noted that this limitation will be less onerous next year.

Although many seem to view this as another delay, it should be noted, as Teslarati pointed out, that Elon Musk was talking about the difficulties of scaling the Semi’s manufacturing. The idea of Tesla actually producing its first few Semis in 2021 still seems possible.  This thought seems backed up by the new report noting that Tesla plans to produce 5 of its Semis on a weekly basis once the low-volume production line is completed.

 



 


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Chevy Bolt Sales Jump 53.7%

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The Chevy Bolt is not the most exciting or flamboyant electric car on the market — it’s not a Tesla or the Ford Mustang Mach-E. However, it is the electric vehicle I see most often on the roads around me aside from all of Tesla’s models. It’s exciting and uplifting to see them, even if the car never put a tingle in the back of my neck.

One thing the Bolt does have in common with the Mach-E is that, love it or not, its sales are pretty weak. That’s not going to change, because it’s a vehicle class that is just not that popular in America. However, the good news is that things are looking up for the little Bolt EV.

In the first quarter of 2021, the Chevy Bolt EV’s sales rose 53.7% over its sales in the first quarter of 2020. In fact, it was the Bolt EV’s best first quarter in history. (Admittedly, it’s not a very long history, but the Bolt EV was the first long-range, semi-affordable electric car on the US market.)

The Bolt EV had 9,025 US sales last quarter, up from 5,873 sales in the first quarter of 2020. That’s the good news. The bad news is that the Bolt EV had just 9,025 US sales last quarter. Multiply that by 4 and you don’t even get to 40,000 sales a year. Heck, you don’t even get to 37,000 sales a year.

You’re not going to cut enough emissions, GM, with under 40,000 electric vehicle sales a year in the 2020s. Tesla likely scored more than 22,000 first-quarter Model 3 sales in the US and 43,000+ first-quarter Model Y sales here. GM needs to understand why its EV of a similar age does so much worse, and how the company could get closer to Tesla’s numbers. The electric revolution is not going to slow down, and a model getting under 100,000 — let alone under 40,000 — annual sales is not going to be seen as a leader for long.

“What about the Bolt EUV? It’s bigger than the little Bolt EV.” Well, we’ll see. …

Chevy Bolt EUV fleet ready for test drives. Photo by Kyle Field, CleanTechnica.

Chevy Bolt EUV with attractive backdrop. Photo by Kyle Field, CleanTechnica.

Inside a Chevy Bolt EUV. Photo by Kyle Field, CleanTechnica.

 



 


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Source: https://cleantechnica.com/2021/04/02/chevy-bolt-sales-jump-53-7/

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