Better Batteries - additional image (IMAGE)
Caption
Factory-charging a new lithium-ion battery with high currents significantly depletes its lithium supply but prolongs the battery’s life, according to research at the SLAC-Stanford Battery Center. The lost lithium is generally used to form a protective layer called SEI on the negative electrode. However, under fast charging conditions, lithium ions are also consumed during side reactions at the negative electrode. This creates additional headspace in both electrodes and helps improve battery performance and lifespan.
Credit
Greg Stewart/ SLAC National Accelerator Laboratory
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License
Public Domain