MATERIAL FOR NEGATIVE ELECTRODE AND NONAQUEOUS-ELECTROLYTE BATTERY INCORPORATING THE SAME

摘要

A material for a negative electrode capable of preventing change in the volume of an active material occurring when lithium is doped/dedoped to improve resistance against cycle operations. A material for a negative electrode contains a mixture of a non-carbon material and a carbon material, wherein when an assumption is made that the average particle size of the non-carbon material is R M and the average particle size of the carbon material is R C, the ratio R M/R C is not higher than one, and when an assumption is made that the weight of the non-carbon material is W M and the weight of the carbon is W C, the ratio W M/W C is not higher than one or a mixture of a silicon compound and a carbon material, wherein, when an assumption is made that the average particle size of the silicon compound is R S; and the average particle size of the carbon material is R C, the ratio R Si/R C is not higher than one.