Homogeneous polymer-ionic solvate electrolyte with weak dipole-dipole interaction enabling long cycling pouch lithium metal battery

Solid polymer electrolytes (SPEs) are considered as promising electrolytes for high-voltage lithium metal batteries. Whereas, the strong dipole-dipole interaction in polymer electrolytes limits the enhancement of the ionic conductivity. Here, we propose the 1,1,2,2-Tetrafluoroethyl-2,2,3,3-Tetrafluoropropylether (TTE) diluent to significantly regulate the dipole-dipole interaction in polymer-ionic solvate electrolytes (TPISEs). The TTE encapsulates ionic solvate to reduce the dipole-dipole interaction of ionic solvate with the polymer matrix, which promotes their homogeneous distribution, creating a continuous ion percolating network among the polymer matrix. The ion conductivity of TPISEs is therefore…

• NN
  National Natural Science Foundation of China

  Awards: 52203298, 523B2022, U2001220, 52325206
• UO
  University of Science and Technology of China
• NK
  National Key Research and Development Program of China

  Award: 2021YFF0500600
• NS
  National Science Fund for Distinguished Young Scholars

  Awards: 52325206, No. 52325206
• TS
  Tsinghua Shenzhen International Graduate School

  Award: SZPR2023006