Patent ID: 8003015

Claim:
A composite positive electrode material for a lithium ion battery comprising: a positive electrode active material (a); a conductive material (b) having a primary particle diameter of 10 to 100 nm; a fibrous conductive material (c) having a fiber diameter of 1 nm to 1 μm; and a conductive material (d) having an aspect ratio of 2 to 50, wherein the composite positive electrode material for a lithium ion battery is obtained by mixing the conductive material (d) with a composition containing the positive electrode active material (a), the conductive material (b) and the conductive material (c), the composition obtained by dispersing the positive electrode active material (a), the conductive material (b) and the conductive material (c) in a solvent to a state where the positive electrode active material (a), the conductive material (b) and the conductive material (c) are forcibly dispersed, and then agglutinating the positive electrode active material (a), the conductive material (b) and the conductive material (c); the composite positive electrode material includes a structure where composite particles obtained by sticking the conductive material (b) and the conductive material (c) to the surface of at least one positive electrode active material (a) are formed and the conductive material (d) is interposed between the composite particles, and the conductive material (c) is different from the conductive material (d).