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Gold/Mining/Energy : Electron Energy Storage
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From: Savant10/1/2024 11:47:23 AM
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New X-ray discovery could lead to the holy grail of long-lasting EV batteries

An international team of researchers led by Michael F. Toney, a Chemical and Biological Engineering professor at the University of Colorado Boulder, has determined the root cause of battery capacity loss over time, also known as self-discharge, using powerful X-rays.

New X-ray discovery could lead to the holy grail of long-lasting EV batteries (msn.com)

The root cause of self-dischargeThe team found hydrogen atoms are formed due to a reaction between the electrolyte and the cathode after the battery is fully charged. These atoms bind to the cathode where lithium would otherwise bind during discharge.

This prevents lithium from reaching the cathode, thereby reducing the electric current generated and the battery’s overall capacity, a press release said. Now that researchers understand what causes self-discharge, they can direct efforts to prevent it.

Coating the cathode with a special material that blocks only hydrogen atoms could be an option. “Typically protective oxides such as alumina (Al2O3) can be used to coat the cathode,” added Toney in the email. “These are not expensive and there are processes to do the coating but we are not sure how long the coating survives.”

Nevertheless, the research opens up new frontiers and could help develop better batteries. As the world looks to phase out fossil fuels, batteries that do not lose charging capacity over their lifespan will be crucial.

It will advance renewable energy storage solutions and reduce the cost of storing excess energy. For electric vehicles, this would mean no decrease in range or a requirement to replace the battery pack even after years of car usage, thereby increasing their adoption.

The research findings were published in the journal Science today.
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