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.
R1(O)n-X1-R2 (I)
In the formula, X1 represents a group -C(=O)-, a group -S(=O)2-, or a group -P(=O)(-R3)-. R1 represents an alkenyl group having from 2 to 8 carbon atoms; R2 represents an alkynyl group having from 3 to 8 carbon atoms or an alkynyloxy group having from 3 to 8 carbon atoms; R3 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.
本发明提供了一种能够改善低温和高温循环特性以及高温充电储存后负载特性的优良非
水基电解溶液、使用该溶液的电
化学元件以及用于该溶液的炔基化合物。
本发明的非
水基电解溶液包含至少一种由下式通式(I)表示的炔基化合物,其在非
水基电解溶液中的含量为 0.01 至 10%(按质量计)。
R1(O)n-X1-R2 (I)
式中,X1 代表基团-C(=O)-、基团-S(=O)2-或基团-P(=O)(-R3)-。R1 代表具有 2 至 8 个碳原子的烯基;R2 代表具有 3 至 8 个碳原子的炔基或具有 3 至 8 个碳原子的炔氧基;R3 代表烷基、烯基、炔基、芳基、烷氧基、烯氧基、炔氧基或芳氧基;n 表示 0 或 1。