申请人:UBE Industries, Ltd.
公开号:EP2744030A1
公开(公告)日:2014-06-18
The present invention provides a nonaqueous electrolytic solution capable of improving electrochemical characteristics in a broad temperature range, such as low-temperature cycle properties and low-temperature discharge properties after high-temperature storage, and provides an energy storage device using the nonaqueous electrolytic solution. The invention includes (1) a nonaqueous electrolytic solution of an electrolyte salt dissolved in a nonaqueous solvent, which comprises from 0.001 to 10% by mass of a compound represented by the following general formula (I), and (2) an energy storage device comprising a positive electrode, a negative electrode, and a nonaqueous electrolytic solution of an electrolyte salt dissolved in a nonaqueous solvent, wherein the nonaqueous electrolytic solution is the nonaqueous electrolytic solution of (1).
(In the formula, Y represents a group -C(=O)- or a group -S(=O)2-; R3 and R4 each independently represent an aryl group having from 6 to 10 carbon atoms in which at least one hydrogen atom is substituted with a halogen atom, or R3 and R4 bonding to each other represent a cycloalkanediyl group or a benzenediyl group, having from 5 to 12 carbon atoms. R represents -C(R1)(R2)- or -L-; R1 and R2 each independently represent a hydrogen atom, a halogen atom, or an alkyl group having from 1 to 4 carbon atoms; and L represents a divalent linking group having from 1 to 6 carbon atoms and optionally substituted with a halogen atom.)
本发明提供了一种非水性电解溶液,能够改善在宽温度范围内的电化学特性,例如低温循环特性和高温储存后的低温放电特性,并提供了一种使用该非水性电解溶液的储能装置。本发明包括:(1)溶解在非水溶剂中的电解质盐的非水性电解溶液,该溶液包含 0.001 至 10%(按质量计)由以下通式(I)表示的化合物;(2)一种储能装置,该装置包括正极、负极和溶解在非水溶剂中的电解质盐的非水性电解溶液,其中非水性电解溶液是(1)的非水性电解溶液。
(式中,Y 代表-C(=O)-基团或-S(=O)2-基团;R3 和 R4 各自独立地代表具有 6 至 10 个碳原子的芳基,其中至少一个氢原子被卤原子取代,或 R3 和 R4 相互结合代表具有 5 至 12 个碳原子的环烷二基或苯二基。R 代表-C(R1)(R2)-或-L-;R1 和 R2 各自独立地代表氢原子、卤素原子或具有 1 至 4 个碳原子的烷基;L 代表具有 1 至 6 个碳原子并可选地被卤素原子取代的二价连接基团)。