公开(公告)号：EP4428982A1

公开(公告)日：2024-09-11

申请号：EP22889808.6

申请日：2022-10-21

申请人： Kyoto University ,  Stella Chemifa Corporation

发明人： NOHIRA, Toshiyuki ,  FUKUNAKA, Yasuhiro ,  MINE, Natsuki ,  KAWAKAMI, Arata ,  OMURA, Misaki ,  EDA, Shohei ,  KOJIMA, Yutaka ,  KATSURA, Yoshifumi ,  SATO, Yoshinori ,  SAKAGUCHI, Toshitaka ,  KON, Sojiro ,  HASEBE, Rui ,  NII, Keiichi ,  NISHIDA, Tetsuo

IPC分类号： H01M10/0569 ,  H01M10/052 ,  H01M10/0568

CPC分类号： Y02E60/10 ,  H01M10/052 ,  H01M10/054 ,  H01M10/0568 ,  H01M10/0569

摘要： Provided are a flame-retardant non-aqueous electrolytic solution which exhibits good flame retardancy and has excellent cycle characteristics and electrical resistance characteristics, and a secondary battery using the flame-retardant non-aqueous electrolytic solution. The flame-retardant non-aqueous electrolytic solution according to the present invention contains at least a non-aqueous solvent and an electrolyte dissolved in the non-aqueous solvent, the non-aqueous solvent contains at least one of phosphoric acid esters of chemical formulae (1) to (3) below, the electrolyte contains at least one of a difluorophosphoric acid salt and a nitric acid salt, and the content of the phosphoric acid ester is 20 mass% or more with respect to the total mass of the flame-retardant non-aqueous electrolytic solution:



wherein X1 to X3 each independently represent a hydrocarbon group having 1 to 20 carbon atoms, or the like, and Y1 and Y2 each independently represent a halogen atom.