A locally solvent-tethered polymer electrolyte for long-life lithium metal batteries

Abstract Solid polymer electrolytes exhibit enhanced Li + conductivity when plasticized with highly dielectric solvents such as N,N-dimethylformamide (DMF). However, the application of DMF-containing electrolytes in solid-state batteries is hindered by poor cycle life caused by continuous DMF degradation at the anode surface and the resulting unstable solid-electrolyte interphase. Here we report a composite polymer electrolyte with a rationally designed Hofmann-DMF coordination complex to address this issue. DMF is engineered on Hofmann frameworks as tethered ligands to construct a locally DMF-rich interface which promotes Li + conduction through a ligand-assisted transport mechanism. A high ionic conductivity…

• NN
  National Natural Science Foundation of China

  Awards: 52072205, U21A20174
• CI
  Canadian Institutes of Health Research
• NS
  Natural Sciences and Engineering Research Council of Canada
• WE
  Western Economic Diversification Canada
• NR
  National Research Council Canada
• NK
  National Key Research and Development Program of China

  Awards: 2021YFB2500200, U21A20174, 52072205
• TS
  Tsinghua Shenzhen International Graduate School