METAL-GRAPHITE BASED PARTICLE, ITS MANUFACTURING METHOD, NEGATIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERY, NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERY AND LITHIUM ION SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a negative electrode material for providing a lithium ion secondary battery having high discharge capacity and excelling in initial charge-discharge capacity and a cycle characteristic.

SOLUTION: The metal-graphite based particles of this application contain metal particles capable of being alloyed with lithium, a plurality of graphitic particles having an average particle diameter of 2-5 μm and an aspect ratio not greater than 3 and a carbonaceous material; and is characterized in that the average particle diameter of the metal particles is not greater than 1/2 of that of the graphitic particles.

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