申请人:UBE INDUSTRIES, LTD.
公开号:US20150372349A1
公开(公告)日:2015-12-24
The present invention provides a nonaqueous electrolytic solution capable of improving electrochemical characteristics in the case of using an energy storage device at a high temperature and further capable of inhibiting the gas generation as well as a capacity retention rate after a high-temperature cycle, and also to provide an energy storage device using the same. Disclosed are a nonaqueous electrolytic solution having an electrolyte salt dissolved in a nonaqueous solvent, the nonaqueous electrolytic solution containing a phenyl ester compound represented by the following general formula (I), and an energy storage device.
(In the formula, R
f
represents a fluoroalkyl group having 1 to 6 carbon atoms; X represents a halogen atom; each of p and q is an integer of 1 to 4; and (p+q) is 5 or less. A has a structure represented by —S(═O)
2
—, —C(═O)—, —C(═O)—O—, —C(═O)-L
1
-C(═O)—, —C(═O)-L
2
-P(═O)(OR)—O—, or —P(═O)(OR)—O—. Y represents a fluorine atom, a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, or an aryl group; L
1
represents an alkylene group, an alkenylene group, an alkynylene group, or a direct bond; L
2
represents an alkylene group; and R represents an alkyl group. However, only when A is —S(═O)
2
—, Y may be a fluorine atom; and only when A is —C(═O)—, Y may be a hydrogen atom. At least one hydrogen atom in each group of the aforementioned alkyl group, alkenyl group, alkynyl group, aryl group, alkylene group, alkenylene group, and alkynylene group may be substituted with a halogen atom.)
本发明提供了一种非水电解质溶液,能够在高温下使用能量存储装置时改善电化学特性,并且在高温循环后能够抑制气体生成以及保持容量保留率,还提供了使用该非水电解质溶液的能量存储装置。所述非水电解质溶液包含溶解在非水溶剂中的电解质盐,该非水电解质溶液包含下述通式(I)所代表的苯酯化合物,以及能量存储装置。(在该式中,Rf代表具有1至6个碳原子的氟烷基;X代表卤素原子;p和q中的每一个是1至4的整数;以及(p+q)不超过5。A具有由—S(═O)2—、—C(═O)—、—C(═O)—O—、—C(═O)-L1-C(═O)—、—C(═O)-L2-P(═O)(OR)—O—或—P(═O)(OR)—O—表示的结构。Y代表氟原子、氢原子、烷基、烯基、炔基或芳基;L1代表烷基、烯基、炔基或直链键;L2代表烷基;R代表烷基。但是,仅当A为—S(═O)2—时,Y可以是氟原子;仅当A为—C(═O)—时,Y可以是氢原子。上述烷基、烯基、炔基、芳基、烷基、烯基和炔基中的每一组中至少一个氢原子可以被卤素原子取代。)