Comb-like copolymer-based gel polymer electrolytes for lithium ion conductors

Yu Hao Liang, Cheng Chien Wang, Chuh-Yung Chen

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38 Citations (Scopus)


A comb-like polymer was prepared by copolymerization of acrylonitrile and poly(ethylene glycol-methyl methacrylate) (PEGMEM). The copolymer was mixed with a propylene carbonate plasticizer and LiClO4 to form a gel polymer electrolyte (GPE). 7Li solid-state NMR analysis was used to elucidate interactions between the lithium ions and unpaired electrons on the gel polymer groups. 7Li magic-angle spinning NMR and Fourier-transform infrared spectroscopy revealed that the PEGMEM segment could promote dissociation of the lithium salt. Differential scanning calorimetry was used to study the thermal behavior of GPEs of different compositions. The conductivity increased with PEGMEM content. Furthermore, the conductivity of GPE based on a comb-like copolymer exceeded that based on polyacrylonitrile (PAN) with the same composition (polymer/plasticizer 50:50 wt.%). Notably, the highest conductivity of the copolymer/plasticizer 50:50 wt.% system (2.51 × 10-3 S cm-1) was close to that for the PAN/plasticizer 20:80 wt.% system (1.90 × 10-3 S cm-1).

Original languageEnglish
Pages (from-to)340-346
Number of pages7
JournalJournal of Power Sources
Issue number1
Publication statusPublished - 2008 Jan 21

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering


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