The present invention provides an electrolytic solution capable of providing an electrochemical device (e.g., a lithium ion secondary battery) or a module that is less likely to generate gas even in high-temperature storage and has high capacity retention even after high-temperature storage. The present invention relates to an electrolytic solution which may contain a compound represented by Y21R21C-CY22R22 wherein R21 and R22 may be the same as or different from each other, and are each H, an alkyl group, or a halogenated alkyl group; Y21 and Y22 may be the same as or different from each other, and are each - OR23 or a halogen atom; and R23 is H, an alkyl group, or a halogenated alkyl group.
本发明提供了一种电解溶液,该电解溶液能够提供一种电
化学装置(例如
锂离子二次电池)或模块,即使在高温储存时也不易产生气体,即使在高温储存后也具有高容量保持率。本发明涉及一种电解溶液,其中可含有由 Y21R21C-CY22
R22 表示的化合物,其中 R21 和
R22 可以彼此相同或不同,并且各自为 H、烷基或卤代烷基;Y21 和 Y22 可以彼此相同或不同,并且各自为 - OR23 或卤原子;R23 为 H、烷基或卤代烷基。