公开(公告)号：EP4250425A1

公开(公告)日：2023-09-27

申请号：EP21905723.9

申请日：2021-12-15

申请人： Huawei Technologies Co., Ltd. ,  Shenzhen Capchem Technology Co., Ltd.

发明人： MA, Qiang ,  DENG, Yonghong ,  ZHANG, Guangzhao ,  HONG, Xiang

IPC分类号： H01M10/0569 ,  H01M10/0567

摘要： This application provides a battery electrolytic solution, including an electrolyte salt and a non-aqueous organic solvent. The non-aqueous organic solvent includes a first organic solvent shown in a formula (I) and/or a second organic solvent shown in a formula (II): R 1 -S(=O) x -N(-R 3 )-R 2 formula (I); and R 1 -S(=O) x -N(-R 3 )-S(=O) y -R 4 formula (II). R 1 and R 4 are separately selected from fluoroalkyl, fluoroalkoxy, fluoroalkenyl, fluoroalkenyloxy, fluoroaryl, or fluoroaryloxy. R 2 and R 3 are separately selected from alkyl, alkoxy, alkenyl, alkenyloxy, aryl, or aryloxy. x is 1 or 2, and y is 1 or 2. A total content in mass of the first organic solvent and/or the second organic solvent in the electrolytic solution ranges from 10% to 90%. The electrolytic solution includes the first organic solvent and/or the second organic solvent of a high content in mass, so that side reactions between the electrolytic solution and the negative electrode can be reduced, thereby improving coulombic efficiency and cycling performance of the battery.