Patent ID: 9209502
Filing Date: 2015-12-08
Classification: H01M,Y02E,Y02P

Abstract:
1. A non-aqueous electrolyte secondary battery comprising a positive electrode, a negative electrode, a separator placed between the positive electrode and the negative electrode, and a non-aqueous electrolyte impregnated at least in the separator, wherein: the positive electrode, the separator and the negative electrode are overlaid on top of each other and wound, the separator comprises a porous resin layer, and a porous heat-resistant layer overlaid at least on a first face of the resin layer; and the heat-resistant layer comprises a filler consisting of an inorganic material, and a binder, wherein: the heat-resistant layer has a porosity of 55% to 68%, and the heat-resistant layer exhibits a 90° peel strength of 2.9 N/m to 15.1 N/m to the resin layer, the filler has an average particle diameter of 0.3 μm to 0.7 μm, and the filler and the binder are contained at a weight ratio of 93:7 to 95:5.