Patent ID: 8801974
Filing Date: 2014-08-12
Classification: C01G,C01P,H01B,H01M,Y02E

Abstract:
1. A method for making a composite of cobalt oxide comprising steps of: providing an aluminum nitrate solution; introducing a plurality of lithium cobalt oxide particles into the aluminum nitrate solution; mixing the plurality of lithium cobalt oxide particles with the aluminum nitrate solution to form a mixture; adding a phosphate solution into the mixture to react with the aluminum nitrate solution and form an aluminum phosphate layer on surfaces of the plurality of lithium cobalt oxide particles; heat treating the plurality of lithium cobalt oxide particles with the aluminum phosphate layer formed on the surfaces thereof to form a lithium cobalt oxide composite; and obtaining a cobalt oxide by electrochemical lithium deintercalation in the lithium cobalt oxide composite at a voltage of Vx, wherein 4.5V<Vx≦5V, a material of the cobalt oxide is represented by a chemical formula of Co