Patent ID: 9634357
Date: 2017-04-25
CPC Classifications: H01M,Y02E,Y02P

Claim:
1. A secondary battery having an electrode assembly, comprising at least one positive electrode, at least one negative electrode, and at least one separator interposed between the positive electrode and the negative electrode, mounted in a battery case, wherein positive electrodes and negative electrodes having different output and capacity properties are provided in combination of a positive electrode and a negative electrode, positive electrode materials added to opposite major surfaces of a positive electrode current collector exhibit different output and capacity properties, negative electrode materials added to opposite major surfaces of a negative electrode current collector exhibit different output and capacity properties, and in the positive electrode and the negative electrode, which face each other in a state in which the separator is interposed between the positive electrode and the negative electrode, the positive electrode material added to one major surface of the positive electrode current collector facing the separator and the negative electrode material added to one major surface of the negative electrode current collector facing the separator exhibit higher capacities or lower capacities than the electrode materials added to the other major surfaces of the electrode current collectors in combination of the positive electrode and the negative electrode.