Patent ID: 8124273

Claim:
A nonaqueous electrolytic solution in which an electrolyte salt is dissolved in a nonaqueous solvent, comprising 0.001% to 5% by weight of a tin compound represented by the following general formula (I) and/or (II), on the basis of the weight of the nonaqueous electrolytic solution: R 1 R 2 R 3 Sn-MR 4 R 5 R 6 (I) where R 1 , R 2 , and R 3 each represent a hydrogen atom, a halogen atom, a C1 to C12 alkyl group, a C2 to C12 alkenyl group, a C2 to C12 alkynyl group, a C6 to C18 aryl group, or a C6 to C18 aryloxy group that may be substituted; R 4 , R 5 , and R 6 each represent a hydrogen atom, a halogen atom, a C1 to C12 alkyl group, a C2 to C12 alkenyl group, a C2 to C12 alkynyl group, or a C6 to C18 aryl group; M represents Si or Ge; and R 1 to R 3 and R 4 to R 6 may be the same or different from each other; and SnX 2 (II) where X represents β-diketonate.