Patent ID: 7767350

Claim:
A nonaqueous electrolyte battery comprising: a cathode using a composite compound of lithium and transition metals as a positive active material; an anode using a negative active material capable of being doped with and dedoped from lithium; a nonaqueous electrolyte interposed between the cathode and the anode; and a battery can containing said cathode, said anode and said nonaqueous electrolyte therein, wherein said battery can is made of iron and wherein an inside of said battery can is plated with nickel, and wherein the nonaqueous electrolyte is obtained by dissolving LiMF m (where M is an element selected from As, B, P and Sb, and m is an integer located within a range of 4 to 6) and LiN(CF 3 SO 2 ) 2 in a nonaqueous solvent consisting of vinylene carbonate and at least one carbonate selected from the group of cyclic carbonates and non-cyclic carbonates, wherein said vinylene carbonate is added within a range of 0.1% by volume to 5% by volume with respect to said nonaqueous solvent; and the concentration of LiN(CF 3 SO 2 ) 2 is located within a range of 1% or more by weight to lower than 10% by weight with respect to said nonaqueous electrolyte.