Patent ID: 8932767
Filing Date: 2015-01-13
Classification: H01M,Y02E,Y02P

Abstract:
1. A nonaqueous electrolyte lithium secondary battery comprising: a separator; and a porous layer which is formed on the separator and which includes an inorganic filler and a binder, wherein an average thickness of the separator ranges from 12 μm to 18 μm, a porosity of the separator ranges from 52% to 67%, an average thickness of the porous layer ranges from 3 μm to 15 μm, a porosity of the porous layer ranges from 44% to 70%, a proportion of the binder ranges from 1.1% by mass to 3.6% by mass when 100% by mass represents a total solid content of the porous layer, and the porous layer-attached separator exhibits a film resistance equal to or lower than 1.35 Ω·cm