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Free keywords:
lithium-air battery, in situ APXPS, superoxide, side reactions
Abstract:
Unfortunately the practical applications of Li-O2 batteries are impeded by poor rechargeability.
Here we for the first time show that superoxide radicals generated at the cathode during discharge react with carbon that contain activated double bonds or aromatics to form epoxy
groups and carbonates, which limits the rechargeability of Li-O2 cells. Carbon materials with a
low amount of functional groups and defects demonstrate better stability thus keeping the carbon
will-o’-the-wisp lit for lithium-air batteries.
