Lithium cobaltate is a good cathode material in lithium ion batteries, which has the advantages of high working voltage, stable discharge, high specific energy and good cycle performance, but it has high cost (using cobalt), poor safety, average cycle life and poor material stability. Lithium-ion batteries, which are mainly used for manufacturing mobile phones, notebook computers and other portable electronic devices, are used as cathode materials. At present, the voltage of lithium cobaltate has reached 4.35-4.45V ...