| 摘要 |
PROBLEM TO BE SOLVED: To provide an electrolyte improved in cycle characteristics in a nonaqueous secondary battery, and specifically to provide a nonaqueous electrolyte contributing an improvement in charge/discharge cycle characteristics when charging/discharging is performed at a high voltage condition of 4.5 V or more in terms of metallic lithium, and a nonaqueous secondary battery using the nonaqueous electrolyte.SOLUTION: A nonaqueous electrolyte contains: a nonaqueous solvent: a lithium salt; and a fluorine-containing phosphoric acid ester with an aryl group represented by the following formula (1) (in the formula, n represents 1 or 2, A represents a 6-10C aryl group or aralkyl group that is unsubstituted or substituted with a substituent selected from the group consisting of a fluorine atom, a 1-6C linear or branched alkyl group, a cyano group, a 2-6C linear or branched cyanoalkyl group and a 1-6C alkoxy group, and Rfrepresents a 1-6C linear or branched fluorine-containing alkyl group.)SELECTED DRAWING: None |
