Patent ID: 7297447

Claim:
A non-aqueous electrolyte battery comprising a positive electrode, a negative electrode, a separator, and a non-aqueous electrolyte, wherein the non-aqueous electrolyte contains at least one selected from the group consisting of a cyclic sultone derivative and an acid anhydride. and an electrolyte salt, the electrolyte salt comprises lithium salt A and lithium salt B, the lithium salt A comprises at least one selected from the group consisting of LiBF 4 , LiPF 6 , LiAsF 6 , and LiSbF6, and the lithium salt B comprises a lithium salt other than the lithium salt A, wherein the lithium salt B is at least one selected from the group consisting of LiClO 4 , LiCF 3 SO 3 , LiC 4 F 9 SO 3 , LiN(CF 3 SO 2 ) 2 , and LiN(C 2 F 5 SO 2 ) 2 , and the electrolyte salt contains the lithium salt A in an amount of 2 to 20 mol % with respect to the electrolyte salt comprising lithium salt A and lithium salt B, wherein the non-aqueous electrolyte contains the cyclic sultone derivative in an amount of 0.5 to 3 wt %.