POSITIVE ELECTRODE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, NONAQUEOUS ELECTROLYTE SECONDARY BATTERY COMPRISING THE SAME, AND METHOD FOR PRODUCING THE SAME

摘要

Disclosed is a positive electrode material for nonaqueous electrolyte secondary batteries, which comprises a porous body composed of a material containing a polyanion. Also disclosed is a method for producing such a positive electrode material for nonaqueous electrolyte secondary batteries. When a carbon coating is formed on the surface of a material containing a polyanion of lithium iron phosphate or the like by a conventional method, the capacity during low rate discharge is improved but the capacity is not sufficient. In the present invention, the positive electrode material for nonaqueous electrolyte secondary batteries, which comprises a porous body composed of a material containing a polyanion, has a structure wherein the inner walls of the pores of the porous body are provided with a layered carbon, for improving the discharge capacity.