Patent ID: 9620767
Date: 2017-04-11
CPC Classifications: H01M,Y02E,Y02P

Claim:
1. A nonaqueous electrolyte secondary battery, comprising: a positive electrode plate; a negative electrode plate; and a separator, wherein, an electrode active material layer containing an electrode active material and a binder is disposed on a surface of a core of at least one of the positive electrode plate and the negative electrode plate, the binder contained in the electrode active material layer is distributed with an amount continuously increased from an outer surface of the electrode active material layer toward the core, the amount of the binder present in the electrode active material layer per unit thickness is less than 10 parts by mass in a region extending from a position 90% of the thickness of the electrode active material layer to a position 100% of the thickness of the electrode active material layer measured from a surface of the electrode active material layer facing the core, with 10 parts by mass being assigned to the amount of the binder present in the electrode active material layer per unit thickness if the binder is uniformly distributed in the electrode active material layer, and wherein further the binder has not penetrated into inside of the separator.