NEGATIVE ELECTRODE ACTIVE 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 improve battery property of a lithium ion secondary battery.

SOLUTION: In a negative electrode 16 of a lithium ion secondary battery, a negative electrode active material includes carbon particles 30 containing an Li occlusion material, and carbon particles 36. The carbon particles 30 containing the Li occlusion material includes a carbon material and an Li occlusion material 34, capable of occluding more lithium than a theoretical capacity of a carbon material for lithium occlusion.

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