NEGATIVE ELECTRODE FOR BATTERY AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To prevent the delamination and cracking of a mixture layer while keeping high capacity without increasing a quantity of binding agent which inhibits the charging and discharging reaction, in a case when a rolled copper foil capable of providing high capacity and the lumped graphite powder easily causing the delamination of the mixture layer layer, are used in the negative electrode active material. SOLUTION: In a negative electrode for nonaqueous electrolyte secondary battery comprising a mixture including a carbon material and a polyvinylidene fluoride resin as a binder and a rolled copper foil, a mixture of lumped graphite powder and mesophase pitch graphite fibrous material is used as the carbon material. Whereby the density and adhesion of the mixture can be improved, and the irreversible capacity and the generation of gas at a high temperature can be inhibited.