Hybrid triazolium and ammonium ions-contained hyperbranched polymer with enhanced ionic conductivity

Hongfei Li, Cuifang Wang, Xiaojuan Liao, Meiran Xie, Ruyi Sun

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Hyperbranched poly(triazole) with tertiary amine moiety and longer flexible polyethylene glycol (PEG) terminal group (hb-PTA-PEG) was synthesized by successive Cu(I)-catalyzed azide-alkyne cycloaddition polymerization, and the corresponding hyperbranched poly(triazolium)s containing hybrid quaternary ammonium ion, [hb-PTA-PEG]+[I] and [hb-PTA-PEG]+[TFSI], were obtained after N-alkylation and anion exchange reactions. These hyperbranched polymers presented broad electrochemical stability window of above 6.0 V versus Ag+/Ag and 5.3 V versus Li+/Li, and displayed low glass transition temperature in the range of −13 to −37 °C, owing to the hyperbranched structure combined with the hybrid ionic moiety and longer flexible PEG end-group. The ionic [hb-PTA-PEG]+[TFSI] showed superior ionic conductivity, which was above 10−5 S cm−1 at 30 °C.

Original languageEnglish
Pages (from-to)297-305
Number of pages9
JournalPolymer
Volume112
DOIs
StatePublished - 10 Mar 2017

Keywords

  • Electrochemical stability
  • Hyperbranched poly(triazolium)
  • Ionic conductivity
  • Quaternary ammonium ion
  • Thermal properties

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