NON-AQUEOUS ELECTROLYTE BATTERY

摘要

Provided is a non-aqueous electrolyte battery capable of ensuring stability when the battery is in an abnormal state and of limiting degradation in charging characteristics and energy density during battery use. The lithium ion secondary battery (1) has an electrode group (5) in which a positive-pole plate (2), which is a current collector where a positive-pole mix containing an active substance has been formed, and a negative-pole plate (3), which is a current collector where a negative-pole mix containing an active substance has been formed, are wound with a porous separator (4) therebetween. A flame retardant layer is placed on at least one face or both faces of the positive-pole plate (2), the negative-pole plate (3), and the separator (4). The flame retardant layer contains a non-fluorinated organic polymer, a flame retardant, and a thickening agent.