Diffusion coefficients in trimethyleneoxide containing comb branch polymer electrolytes

Diffusion coefficients in trimethyleneoxide containing comb branch polymer electrolytes

TitleDiffusion coefficients in trimethyleneoxide containing comb branch polymer electrolytes
Publication TypeJournal Article
Year of Publication2004
AuthorsGao Liu, Craig L Reeder, Xiao-Guang Sun, John B Kerr
JournalSolid State Ionics
Volume175
781
Issue1-4
Pagination781-783
Date Published11/2004
Keywordscomb branch polyethers, conductivity, lithium battery, polymer electrolytes, salt diffusion coefficient, trimethylene oxide
Abstract

This paper reports on a new comb branch polymer based on trimethylene oxide (TMO) side chains as a polymer electrolyte for potential application in lithium metal rechargeable batteries. The trimethylene oxide (TMO) units are attached to the side chains of a polyepoxide ether to maximize the segmental motion. Lithium bis(trifluoromethylsulfonyl)imide (LiTFSI) salt was used to formulate the polymer electrolyte with the new TMO containing polymers. The new polymer electrolytes show improved salt diffusion coefficients (Ds) and conductivity at ambient and subambient temperature compare to the ethylene oxide (EO) counterpart, whereas performance at high temperature (85 °C) remains the same or is actually worse for salt diffusivity.

DOI10.1016/j.ssi.2003.11.041
Original PublicationFourteenth International Conference on Solid State Ionics