Patent ID: 9673445
Date: 2017-06-06
CPC Classifications: B60L,H01M,Y02E,Y02P,Y02T

Claim:
1. A battery, comprising: a positive electrode including a positive electrode current collector having a pair of surfaces, and a positive electrode active material layer provided on each of the surfaces of the positive electrode current collector, the positive electrode active material layer containing a positive electrode active material, the positive electrode active material including a lithium nickel composite oxide; the lithium nickel composite oxide having a layer structure, and containing at least lithium and nickel; the lithium nickel composite oxide includes at least one composite oxide represented by a following formula (1): where M1 represents at least one element selected from the group consisting of boron (B), magnesium (Mg), aluminum (Al), silicon (Si), phosphorus (P), sulfur (S), titanium (Ti), chromium (Cr), iron (Fe), copper (Cu), zinc (Zn), gallium (Ga), germanium (Ge), yttrium (Y), zirconium (Zr), molybdenum (Mo), silver (Ag), barium (Ba), tungsten (W), indium (In), tin (Sn), lead (Pb) and antimony (Sb); x, y, z and b are within ranges of 0.8<x≦1.2, 0.5≦y≦1.0, 0≦Z≦0.5, y+z≦1 and 1.8≦b≦2.2; and a composition of lithium varies depending on charging and discharging state, and x indicates a value in a fully-discharged state, the positive electrode active material layer having an area density S [mg/cm a negative electrode; and a separator at least including a porous film, the porous film having a porosity ε [%] and an air permeability t [sec/100 cc] which satisfy formula of: where ε is the porosity [%], t is the air permeability [sec/100 cc], S is the area density of the positive electrode active material layer [mg/cm