SECONDARY BATTERY

摘要

Provided is an extremely safe secondary battery with which the occurrence of defects in the battery can be prevented even if there is an increase in the battery internal temperature due to overcharging and so on. A separator (70) in the secondary battery has a laminated structure comprising at least two porous layers (76A, 72, 76B), and one layer from among these is formed as a porous electroconductive layer (72) having an electroconductive material (74) dispersed therein.