| 摘要 |
An object of the invention is to provide a nonaqueous electrolytic solution which is capable of bringing about a nonaqueous-electrolyte secondary battery improved in initial charge capacity, input/output characteristics, and impedance characteristics, The invention relates to a nonaqueous electrolytic solution which comprises: a nonaqueous solvent; LiPF 6 ; and a fluorosulfonic acid salt represented by formula (1): M(FSO 3 ) x [wherein M is a metal atom, N(R) 4 , or P(R) 4 (where R is either an organic group having 1-12 carbon atoms or a hydrogen atom (not all of the four R's are hydrogen atoms), the R's may be the same or different, and a part or all of the four R's may form a ring in cooperation with the nitrogen atom or phosphorus atom to which the R's have been bonded); when M is a metal atom, x indicates the valence of the metal atom M and is an integer of 1 or larger; and when M is N(R) 4 or P(R) 4 , x is 1], wherein the ratio of the molar content of FSO 3 in the nonaqueous electrolytic solution to the molar content of PF 6 in the nonaqueous electrolytic solution is 0.001-1.2, and to a nonaqueous-electrolyte secondary battery containing the nonaqueous electrolytic solution. |
