Patent ID: 7582386

Claim:
A nonaqueous electrolyte battery comprising: a positive electrode comprising a positive electrode layer containing a metal compound, a conductive agent and a binder, the metal compound containing lithium and at least one metal selected from the group consisting of cobalt, nickel, manganese, iron and vanadium; a negative electrode comprising a negative electrode layer containing a conductive agent, a binder and a negative electrode active material which is a titanium-containing metal composite oxide having a Li ion insertion potential not lower than 0.4 V (vs. Li/Li + ), the negative electrode layer having a porosity of 20 to 50%; and a nonaqueous electrolyte; wherein the positive electrode layer and the negative electrode layer satisfy formulas (1) to (3) given below: 0.5m 2 /g≦ S n ≦50m 2 /g (1) 5≦( S n /S p )≦100 (2) 0.5≦( L p /L n )<1 (3) where S n denotes a specific surface area (m 2 /g) of the negative electrode layer as determined by the BET method, S p denotes a specific surface area (m 2 /g) of the positive electrode layer as determined by the BET method, L n denotes a thickness (μm) of the negative electrode layer, and L p denotes a thickness (μm) of the positive electrode layer.