Patent ID: 9099757
Filing Date: 2015-08-04
Classification: H01M,Y02E,Y02P

Abstract:
1. A battery comprising: a laminated electrode assembly in which a positive electrode, a negative electrode, and a separator are laminated together; and an alumina-containing layer comprising γ-alumina particles formed on at least one member selected from among the group consisting of the positive electrode, the negative electrode, and the separator, wherein a primary particle diameter median value of the 7-alumina particles is not less than 1 nm and not more than 100 nm, at least one of the positive electrode and the negative electrode includes a current collector and an active material layer, the active material layer includes a tapered zone having a thickness which tapers off, and a bulk zone, a thickness of the alumina-containing layer is less than a thickness of the bulk zone of the active material layer, and wherein a specific surface area of the γ-alumina particles is in a range from 96 m