COMPOSITION, CARBON COMPOSITE MATERIAL FOR LITHIUM ION SECONDARY BATTERY NEGATIVE ELECTRODE MATERIAL, NEGATIVE ELECTRODE MIXTURE 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 carbon composite material for a lithium ion secondary negative electrode material capable of providing a lithium ion secondary battery which has further improved charge/discharge capacity density and charge/discharge cycle characteristics, and to provide a negative electrode mixture for the lithium ion secondary battery, a negative electrode for the lithium ion secondary battery, and the lithium ion secondary battery.

SOLUTION: A composition before heat treatment, which is used for forming a carbon composite material for a lithium ion secondary negative electrode material, contains silica particles and a phenolic resin. When the phenolic resin is A wt.% in residual carbon ratio after heat treatment, the content of the silica particles is 100A/(100+A) wt.% or more and 4900A/(100+49A) wt.% or less with respect to the total amount of the silica particles and the phenolic resin.

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