NEGATIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a negative electrode material for a lithium ion secondary battery superior in electrode plate intensity.

SOLUTION: The negative electrode material for the lithium ion secondary battery contains high-functional-group-volume graphite with a surface functional group volume of≥2.0 meq/kg, and a low-functional-group-volume graphite with a surface functional group volume of less than 2.0 meq/kg, with a mass ratio (high-functional-group-volume graphite/low-functional-group-volume graphite) of the high-functional-group volume graphite to the low-functional-group-volume graphite of 10/90 to 80/20.

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