LITHIUM SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To enhance cycle life characteristic of a lithium secondary battery using lithium manganese for a positive electrode active material and a carbon material for a negative electrode active material. SOLUTION: A negative electrode active material layer is formed by using a mixture of an amorphous carbon material, a conductive material, an ammonium polyphosphate and PVDF. A material containing powder of either vapor phase deposited fibers, acetylene black or conductive ceramic fibers is used for the conductive material. The conductive material contained is preferably 1-10 wt.% to the amorphous carbon material, and the ammonium phosphate contained is preferably 1-10 wt.% to the entire negative electrode active material.