Patent ID: 7682752

Claim:
A battery comprising: a film-shaped package member; a cathode in the film-shaped package member, the cathode including a cathode current collector and a cathode active material layer on at least part of the cathode current collector; an anode in the film-shaped package member, the anode including an anode current collector and an anode active material layer on at least part of the anode current collector; an exposed region on each current collector where the active material layer is not disposed on the current collector; a separator in between the cathode and the anode, and a polymer electrolyte in between the separator and each of the active material layers, wherein, the polymer electrolyte includes a polymer, the exposed region and the separator are at least partially adhered to each other by the polymer electrolyte, and the peel strength when the exposed region that is at least partially adhered to the separator are peeled from each other is 5 mN/mm or greater.