IMPROVED LITHIUM-BASED RECHARGEABLE BATTERIES

摘要

A cathode composition for lithium ion and lithium metal batteries includes a transitional metal oxide, the transitional metal oxide comprising a plurality of compositionally defective crystals. The defective crystals have an enhanced oxygen content as compared to a bulk equilibirum counterpart crystal. An oxygen-rich lithium manganese oxide composition can provide an improved cathode which allows formation of rechargeable batteries having enhanced characteristics. Cathodes can exhibit high capacity (> 150 mAh/gm), long cycle life (less than 0.05 % capacity loss per cycle for 700 cycles), and high discharge rates (> 25 C for a 25 % capactiy loss).