| 摘要 |
PROBLEM TO BE SOLVED: To provide a nonaqueous electrolytic solution with flame resistance and self-extinguishing property by using a mixed solvent of one or more cyclic esters and one or more chain esters, which are mutually compatible as a nonaqueous solvent and using a halogenated chain carbonate with a specified composition for the chain ester. SOLUTION: This battery comprises a negative electrode and a positive electrode, containing a material which can electrochemically occlude and desorb lithium and a non-aqueous electrolytic substance produced by dissolving a lithium salt as an electrolytic substance in a nonaqueous solvent. The nonaqueous solvent is a mixed solvent containing one or more cyclic esters and one or more chain esters, which are mutually compatible as a nonaqueous solvent, and at least one chain ester is halogenated chain carbonate with a specified composition having a defined formula (wherein n and n' are each 1-3; X is F, C, Br, or I; m+m'=1 to 2(n+n'+1) for the chain ester. The safety of the buttery is high by using a mixture which has such a self-extinguishing property for the solvent in the electrolytic solution. |
