COMPOSITE GRAPHITE PARTICLE FOR NONAQUEOUS SECONDARY BATTERY NEGATIVE ELECTRODE, NEGATIVE ELECTRODE FOR NONAQUEOUS SECONDARY BATTERY AND NONAQUEOUS SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a high capacity carbon material for nonaqueous secondary battery negative electrode excellent in cycle characteristics and having high charge and discharge efficiency, and to provide a negative electrode for nonaqueous secondary battery using the same, and a nonaqueous secondary battery including this negative electrode.SOLUTION: In composite graphite particles (D) for nonaqueous secondary battery negative electrode containing graphite (A), Li and metal particles (B) that can be alloyed, and a hydrophilic polymer (C), the ratio (b)/(d) represented by the grain size (b) of the metal particles (B) and the grain size (d) of the composite graphite particles (D) is 0.08 or less.SELECTED DRAWING: None