| 摘要 |
The present invention provides an excellent nonaqueous electrolytic solution capable of improving low-temperature and high-temperature cycle properties and load characteristics after high-temperature charging storage, an electrochemical element using it, and an alkynyl compound used for it. The nonaqueous electrolytic solution of the present invention comprises at least one alkynyl compound represented by the following general formula (I) in an amount of from 0.01 to 10% by mass in the nonaqueous electrolytic solution.
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ R 1 (O) n -X 1 -R 2 €ƒ€ƒ€ƒ€ƒ€ƒ(I)
In the formula, X 1 represents a group -C(=O)-, a group -S(=O) 2 -, or a group -P(=O)(-R 3 )-. R 1 represents an alkenyl group having from 2 to 8 carbon atoms; R 2 represents an alkynyl group having from 3 to 8 carbon atoms or an alkynyloxy group having from 3 to 8 carbon atoms; R 3 represents an alkyl group, an alkenyl group, an alkynyl group, an aryl group, an alkoxy group, an alkenyloxy group, an alkynyloxy group, or an aryloxy group; n indicates 0 or 1. |
