Patent ID: 9647256
Date: 2017-05-09
CPC Classifications: B60L,H01M,H02J,Y02E,Y02P,Y02T

Claim:
1. A battery, comprising: a positive electrode that includes a positive electrode current collector, and a positive electrode active material layer which includes a positive electrode active material and is provided on both surfaces of the positive electrode current collector; a negative electrode; a separator that includes at least a porous film; and an electrolyte, wherein the positive electrode active material includes a positive electrode material including a lithium cobalt composite oxide which has a layered structure and includes at least lithium and cobalt, an area density S (mg/cm the porous film satisfies the following Expressions: [provided that, Ri: a film leakage resistance (μm), L: a film thickness (μm), τ: a tortuosity factor, T: air permeability (sec/100 cc), d: a pore size (nm), Rz: a surface roughness maximum height (the sum of values of a front surface and a rear surface) (μm), ε: porosity (%), ε′: corrected porosity (%), and S: the area density of the positive electrode active material layer (mg/cm