Succinonitrile as a Versatile Additive for Polymer Electrolytes


  • The authors thank Dr. I. Platthaus, E. Schmitt, G. Götz, and S. Wang for their assistance. L.-Z.F. is indebted to the Alexander von Humboldt (AvH) Foundation in Germany and NSF in China for financial support. The authors thank the useful remarks from reviewers.


Solid polymer electrolytes with high ionic conductivities are prepared by using poly(ethylene oxide) (PEO) and poly(vinylidene fluoride-co-hexafluoropropylene) (P(VDF-HFP)) as polymer matrixes, succinonitrile (SN) as an additive, and lithium bis-trifluoromethanesulfonimide (LiTFSI) and lithium bisperfluoroethylsulfonylimide (LiBETI) as salts. In these systems, the introduction of succinonitrile into the polymer electrolytes increases the material's ionic conductivity and conveys excellent mechanical properties. The described composites, with their beneficial combination of mechanical and electric properties, are expected to have significant potential for lithium batteries.