| 摘要 |
PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte improved in discharge preservation characteristics and high-temperature preservation characteristics.SOLUTION: A nonaqueous electrolyte includes a lithium salt and a nonaqueous solvent which dissolves the same, further comprising a compound expressed by the following general formula (1). (In the formula (1), Ar represents an aromatic ring or heteroaromatic ring which may have a substituent group; A represents an organic group with 1-20 carbon atoms, which may have a heteroatom; n is an integer of 1 or 2; k is an integer of 1 or 2; and l is an integer of 0 or 1; when k=1, X is a sulfonyl group, a sulfinyl group or a carbonyl group; when k=2, X is a phosphoryl group; Y is O or NRa; when l=0, it means that Ar and X are directly bonded; Ra represents hydrogen or an alkyl group with 1-6 carbon atoms.) |
