Patent ID: 6706446
Filing Date: 2004-03-16
Classification: H01M,Y02E,Y02P

Abstract:
A non-aqueous electrolytic solution secondary battery where an electrode winding group where a positive electrode formed by applying positive electrode active material mixture including a lithium-manganese complex oxide comprising secondary particles formed of aggregated primary particles of said complex oxide and conductive material on both surfaces of a strip-shaped collector by approximately even amounts to the both surfaces and a negative electrode from/in which lithium ions can be released/occluded through charging/discharging are wound through a separator is accommodated into a battery container having an internal pressure releasing mechanism which releases internal pressure at a predetermined internal pressure,wherein an average particle diameter of the primary particles of the lithium-manganese complex oxide is in a range of from 0.1 &mgr;m to 2 &mgr;m, wherein the lithium-manganese complex oxide is expressed by a chemical formula Li1+xMn2âˆ’xO4, wherein 0&lE;x&lE; about 0.2, and wherein the weight of particles with a particle diameter of 1 &mgr;m or less contained in the lithium-manganese complex oxide is at most 0.01%.