MANUFACTURING METHOD OF POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY

PROBLEM TO BE SOLVED: To provide a lithium battery having large charge and discharge capacity, excellent high-rate discharge in particular, and stability for a long period of time, in which a conductive carbon layer is formed by baking water soluble carbonhydrate having reducibility, or mixed water soluble carbonhydrate mixed with the water soluble carbonhydrate having reducibility and the water soluble carbonhydrate having no reducibility on the surface of an olivine type M lithium phosphate particle or between the particles as a positive electrode active material of olivine type M lithium phosphate (M is an element containing at least one or more kinds of iron, cobalt, manganese, and nickel), and threreby, elution of a metal component can be suppressed in order to coat the active material particle, and current collecting effect is enhanced. SOLUTION: Olivine type M lithium phosphate (M is an element containing at least one or more kinds of iron, cobalt, manganese, and nickel), and water soluble carbonhydrate having reducibility or mixed water soluble carbonhydrate mixed with the water soluble carbonhydrate are heat-treated in an inert atmosphere to carbonize the water soluble cabonhydrate or the mixed water soluble carbonhydrate. COPYRIGHT: (C)2008,JPO&INPIT