公开(公告)号：EP4386904A1

公开(公告)日：2024-06-19

申请号：EP23211785.3

申请日：2023-11-23

申请人： REPT BATTERO Energy Co., Ltd. ,  Shanghai Ruipu Energy Co., Ltd.

发明人： CAO, Hui ,  CUI, Yi ,  HOU, Min ,  FU, Lixin ,  LIU, Chan

IPC分类号： H01M4/38 ,  H01M4/485 ,  H01M4/525 ,  H01M10/052 ,  H01M10/0565 ,  H01M4/131 ,  H01M4/133 ,  H01M4/134 ,  H01M4/136

CPC分类号： Y02E60/10 ,  Y02P70/50 ,  H01M10/0565 ,  H01M10/052 ,  H01M2300/008520130101 ,  H01M2300/009120130101 ,  H01M4/131 ,  H01M4/133 ,  H01M4/134 ,  H01M4/136 ,  H01M4/381 ,  H01M4/386 ,  H01M4/485 ,  H01M4/525

摘要： The present invention discloses a method for preparing an in-situ polymerized semi-solid state battery, comprising the following steps: assembling: assembling a cathode plate, a separator and an anode plate into a case to form a dummy cell; first injection: injecting a lithium battery liquid electrolyte; aging and formation; second injection: injecting a mixture of polymer monomers, a plasticizer and an initiator, wherein the polymer monomers are a combination of vinylene carbonate and tripropargyl phosphate; aging, and in-situ polymerization at 58-65°C to form gel, thus obtaining a low impedance semi-solid state battery. The formulation of the second injection of the present invention comprises a tridimensional monomer, and the liquid electrolyte can be locked in the three-dimensional structure after crosslinking. Compared with a chain polymer, fewer polymers can be used to achieve the gel effect, the formed gel structure is more stable and possesses better thermal stability, and at the same time, the liquid component is higher and the impedance is lower, so that the semi-solid state battery with low impedance is obtained.