Patent ID: 9640800
Date: 2017-05-02
CPC Classifications: H01M,Y02E,Y02P,Y02T

Claim:
1. A nonaqueous electrolyte secondary battery comprising: a positive electrode including an aluminum foil and a positive electrode active material layer formed thereon; a negative electrode containing a negative electrode active material; and a nonaqueous electrolyte containing a nonaqueous solvent and a solute dissolved therein, wherein the aluminum foil of the positive electrode having an at least partially roughened surface adjacent to the positive electrode active material layer, the positive electrode including a conductive layer containing a conductor and a binder in recesses in the at least partially roughened surface of the aluminum foil, and the positive electrode active material layer being disposed on the conductive layer and containing a positive electrode active material, the conductor, and the binder, wherein the conductor contained in the positive electrode comprises at least two conductors with different particle sizes, and wherein the nonaqueous electrolyte secondary battery satisfies the relationship R where R R R Rsm is an average roughening interval of a roughened surface of the aluminum foil determined by a method specified as a mean width of profile elements in JIS B0601-2001.