Patent ID: 9118079
Filing Date: 2015-08-25
Classification: H01M,Y02E,Y02P,Y02T

Abstract:
1. A nonaqueous electrolytic solution secondary battery comprising an electrode body that contains a positive electrode and a negative electrode, wherein an upper limit operating potential of the positive electrode is 4.5 V or more based on metallic lithium, the positive electrode includes a current collector and an active material layer formed on the current collector, the current collector includes a base material and a surface layer disposed on a surface of the base material, the surface layer is disposed at least in a region where the active material layer is not formed on the surface of the base material, the surface layer is formed of an aluminum material having an aluminum content of 99.85% by mass or more, the base material is formed of a conductive material having strength larger than strength of the surface layer, the conductive material that forms the base material is an aluminum material, and the aluminum material that forms the base material has an aluminum content lower than the aluminum content of the aluminum material that forms the surface layer.