Patent ID: 8568926

Claim:
A non-aqueous electrolyte battery comprising: an electrode group comprising a positive electrode, a negative electrode and a separator disposed between the positive electrode and negative electrode; and a non-aqueous electrolyte, wherein the negative electrode comprises a current collector and a porous negative electrode layer formed on the current collector and containing lithium compound particles as an active material and binder, a distribution of grain size in the lithium compound particles has a peak at a grain size of 0.3 to 2 μm and a peak at a grain size exceeding 2 μm and less than 10 μm, and the relation: 0.2≦(b/a)≦1.0 is established between the maximum frequency (a) in the range from 0.3 to 2 μm and the maximum frequency (b) in the range exceeding 2 μm and less than 10 μm, the binder contains 2 to 7% by weight of porous negative electrode layer, the porous negative electrode layer has pores at least in the binder and between lithium compound particles and the binder, the pores in the porous negative electrode layer are distributed such that a distribution has a first peak at a pore diameter of 0.04 to 0.15 μm and a second peak at a pore diameter of 0.8 to 6 μm in the relation between the pore diameter and log differential intrusion obtained in the mercury press-in method, and the non-aqueous electrolyte comprises at least one electrolytic salt selected from the group consisting of LiPF 6 , LiBF 4 , Li(CF 3 SO 2 ) 2 , LiCF 3 SO 3 , Li(C 2 F 5 SO 2 ) 2 N, LiClO 4 , LiAsF 6 , LiSbF 6 , LiB(C 2 O 4 ) 2 and LiBF 2 (OCOOC(CF 3 ) 2 , and at least one non-aqueous solvent selected from the group consisting of propylene carbonate (PC), ethylene carbonate (EC), 1,2-dimethoxyethane (DME), γ-butyrolactone (GBL), tetrahydrofuran (THF), 2-methyltetrahydrofuran (2-MeHF), 1,3-dioxolan, sulfolane, acetonitrile (AN), diethyl carbonate (DEC), dimethyl carbonate (DMC), methyl ethyl carbonate (MEC) and dipropyl carbonate (DPC).