Patent ID: 7026075

Claim:
A nonaqueous electrolyte battery, comprising: a positive electrode; a negative electrode comprising at least one element selected from the group consisting of aluminum, calcium and magnesium; and a nonaqueous electrolytic solution comprising a mixed solvent of an organic solvent and an alkyl sulfone having a structure represented by R 1 R 2 SO 2 , where R 1 and R 2 are each independently an alkyl group, and at least one salt selected from the group consisting of aluminum salt, calcium salt and magnesium salt, wherein said alkyl sulfone is at least one alkyl sulfone selected from the group consisting of dimethyl sulfone, and dipropyl sulfone, and wherein said organic solvent is at least one selected from the group consisting of propylene carbonate, γ-butyrolactone and, acetonitrile.