Patent ID: 8895191

Claim:
A nonaqueous electrolyte battery comprising a positive electrode comprising a positive electrode current collector and a positive electrode layer provided on the positive electrode current collector; a negative electrode comprising a negative electrode current collector and a negative electrode layer provided on the negative electrode current collector; and a nonaqueous electrolyte, wherein the positive electrode layer contains a positive electrode active material, the positive electrode active material containing a lithium-nickel-cobalt-manganese complex oxide represented by the formula Li 1+a Ni 1−b−c Co b Mn c O 2 , where a, b, and c satisfy a relationship represented by a inequality 0≦a≦0.2, 0<b≦0.4, and 0<c≦0.4, respectively; the negative electrode layer contains a negative electrode active material, the negative electrode active material containing at least one selected from a lithium titanate having a spinel structure and a monoclinic β-type titanium complex oxide, and at least one selected from a oxide which has a spinel structure and represented by the formula AFe 2 O 4 and a oxide which has a spinel structure and represented by the formula ACo 2 O 4 , where A is at least one element selected from the group consisting of Cu, Co, Ca, Mg, Zn, Ni, and Fe; a ratio of the total mass of the oxide represented by the formula AFe 2 O 4 and the oxide represented by the formula ACo 2 O 4 to the total mass of the negative electrode active material is in a range from 1% by mass to 5% by mass; and a capacity of the negative electrode is larger than that of the positive electrode.