High-energy batteries (IMAGE)
Caption
Time-lapse series of images shows the new type of battery becoming fully discharged over a period of days. In the process of discharging, the new "catholyte" material in the battery cell gets chemically coverted into a reddish compound, so the color gets darker the more it discharges.
Credit
Image courtesy of Haining Gao, Alejandro Sevilla, and Betar Gallant, et. al
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