A study of the capacity fade of a LiCoO/graphite battery during the temperature storage process at 45 °C under different SOCs.

Lithium-ion batteries with lithium cobalt oxide (LiCoO) as a cathode and graphite as an anode are promising energy storage systems. However, the high-temperature storage mechanism under different states of charge (SOCs) conditions in batteries remains inadequately elucidated, and a clear storage policy has yet to be established. This study investigates and compares the capacity decay mechanism of a 63 mA h LiCoO/graphite battery at 45 °C under various SOCs (100%, 75%, 50%, 30%, 0%), while also analysing the underlying reasons for this decay.