Patent ID: 9705126
Date: 2017-07-11
CPC Classifications: H01G,H01M,Y02E,Y02T,Y10T

Claim:
1. A positive electrode for a battery, comprising: a metallic positive electrode current collector; a conductive intermediate layer being formed on the positive electrode current collector and comprising conductive particles and a binder; and a positive electrode active material layer being formed on the intermediate layer and comprising a positive electrode active material, wherein the intermediate layer is directly in contact with the positive electrode current collector and the positive electrode active material layer, only a single layer of the intermediate layer is present between the positive electrode current collector and the positive electrode active material layer, in the intermediate layer, the conductive particles and the binder are present at a mass ratio of 98:2 to 70:30, the conductive particles contained in the intermediate layer has a size distribution that exhibits a first peak with the maximum at a first particle diameter value and a second peak with the maximum at a second particle diameter value, with the second particle diameter value being larger than the first diameter value, the intermediate layer contains 10% to 60% by mass of second conductive particles having particle diameters that belong to the second peak, and the first particle diameter value is 20 nm to 50 nm, the second particle diameter value is 30 nm to 5 μm, and the second particle diameter value is 1.5 times the first particle diameter value or larger.