COMPOSITE POSITIVE ELECTRODE MATERIAL FOR FULL SOLID STATE LITHIUM ION BATTERY, PREPARATION PROCESS THEREFOR AND FULL SOLID STATE LITHIUM ION BATTERY

摘要

Provided in the present invention is a composite positive electrode material for a full solid state lithium ion battery; the composite positive electrode material for a full solid state lithium ion battery comprises: a positive electrode active material and a coating layer disposed on the surface of the positive electrode active material; the positive electrode active material is one or more of lithium cobalt oxide, lithium nickelate, lithium manganese, lithium iron phosphate, lithium nickel cobalt manganese oxide, vanadium pentoxide, molybdenum trioxide and titanium disulfide; the material of the coating layer is one or more of transition metal oxides containing lithium; the coating layer can effectively control the formation of a space charge layer, improve the interface of the electrode/inorganic solid state electrolyte, facilitate reducing the interface resistance of the full solid state lithium ion battery, and thus increase the cycle stability and durability of the full solid state lithium ion battery. Also provided in the present invention are a preparation process for the composite positive electrode material for a full solid state lithium ion battery, and a full solid state lithium ion battery comprising the composite positive electrode material for a full solid state lithium ion battery.