| abstract |
Provided are a non-aqueous electrolyte for a lithium secondary battery and a lithium secondary battery that can improve battery characteristics such as output, capacity retention rate, and initial discharge capacity. A nonaqueous electrolytic solution in which an electrolyte mainly composed of LiPF 6 is dissolved in a nonaqueous solvent and contains Li + ions and PF 6 − ions in the nonaqueous solvent. The liquid contains an anion compound represented by the following general formula (1) and one or more added cations selected from Na + ion, K + ion, Rb + ion, Cs + ion, and tetraalkylammonium ion And are added. Moreover, the lithium secondary battery using this non-aqueous electrolyte. (However, M is a transition metal, group III, group IV or group V element of the periodic table, b is 1 to 3, m is 1 to 4, n is 0 to 8, and q is 0 or 1.) [Selection figure] None |