Studies on comb-like polymer electrolyte with a nitrile group

Wu Huan Hou, Chuh Yung Chen

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)

Abstract

The behavior of lithium ions in a comb-like polymer electrolyte with a nitrile group has been characterized by differential scanning calorimeter (DSC), thermogravimetric analysis (TGA), ac impedance, Fourier transform infrared (FTIR) spectroscopy, and 7Li solid-state NMR measurements. The comb-like copolymer is synthesized by poly(ethylene glycol-methyl ether methacrylate) (PEGMEM) and acrylonitrile (AN). FTIR spectra reveal the interactions of Li+ ions with both the ether oxygen of the PEGMEM and the nitrogen atom of the AN segments. 7Li solid-state NMR spectra demonstrate the interactions of Li+ ions with both the ether oxygen of the PEGMEM and the nitrogen atom of the AN segments. Moreover, 7Li solid-state NMR shows that the lithium ions are preferentially coordinated to the PEGMEM segment. The Tg increases for the copolymers doped with LiClO4. These results indicate the interactions of Li+ with both PEGMEM and AN segments form transient cross-links. The dependence of the maximum conductivity on the doping lithium ion concentration was determined. The AN unit in the copolymer improves the dissociation of the lithium salt, and the mechanical strength.

Original languageEnglish
Pages (from-to)2105-2112
Number of pages8
JournalElectrochimica Acta
Volume49
Issue number13
DOIs
Publication statusPublished - 2004 May 30

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Electrochemistry

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