MULTILAYER-STRUCTURED CARBON MATERIAL FOR NONAQUEOUS ELECTROLYTIC SOLUTION SECONDARY BATTERY NEGATIVE ELECTRODE, NEGATIVE ELECTRODE FOR NONAQUEOUS SECONDARY BATTERY, LITHIUM ION SECONDARY BATTERY, AND PROCESS FOR PRODUCING MULTILAYER-STRUCTURED CARBON MATERIAL FOR NONAQUEOUS ELECTROLYTIC SOLUTION SECONDARY BATTERY NEGATIVE ELECTRODE

摘要

The present invention resolves the problem by using a multilayer-structured carbon material, as a nonaqueous electrolytic solution secondary battery negative electrode, which satisfies the following (a) and (b):(a) (Void fraction calculated from DBP oil absorption)/(Void fraction calculated from tapping density) is less than 1.01; and(b) Surface oxygen content (O/C) determined by X-ray photoelectron spectroscopy is 1.5 atomic % or more.