Patent ID: 7687202
Filing Date: 2010-03-30
Classification: H01M,Y02E

Abstract:
1. A non-aqueous electrolyte secondary battery comprising: (a) a positive electrode comprising a positive electrode material mixture containing a composite lithium oxide and a positive electrode current collector carrying said positive electrode material mixture; (b) a negative electrode comprising a material capable of absorbing and desorbing lithium; (c) a separator comprising a polyolefin resin; (d) a non-aqueous electrolyte; and (e) a heat-resistant insulating layer interposed between said positive electrode and said negative electrode, said heat-resistant layer comprising an inorganic oxide filler and a resin component, wherein said composite lithium oxide has a composition represented by a general formula (1): Li wherein b and c are selected so that 0.95≦b+c≦1.05 is satisfied, and wherein said positive electrode active material mixture has an estimated heat generation rate at 200° C. of not greater than 50 W/kg.