NEGATIVE ELECTRODE ACTIVE MATERIAL FOR NONAQUEOUS ELECTROLYTIC SOLUTION SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a negative electrode active material for a nonaqueous electrolytic solution secondary battery which has a high capacity, in which there is no cycle deterioration, and which is superior in a volume stability and appropriately used as the negative electrode active material for the nonaqueous electrolytic solution secondary battery using a laminated film for a sheath material. SOLUTION: A complex material is used as the negative electrode active material for a nonaqueous electrolytic solution secondary battery wherein a material which can reversibly occlude/discharge lithium ion of tin oxide or the like from a carrier consisting of a porous electroconductive substance of carbon or the like wherein a mode in a pore size distribution measured by a mercury porosimetry is 1 nm or more.