Lithium-ion conductive polymers as prospective membranes for lithium-seawater batteries

Daniel T. Welna, David A. Stone, Harry R. Allcock

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

Novel amphiphilic single-ion conductive polynorbornenes with pendent cyclotriphosphazenes have been studied as candidates for lithium-ion conductive membranes for lithium-seawater batteries. The cyclotriphosphazene components were linked to a 5-norbornene-2-methoxy substituent to provide a polymerizable unit. 2-(2-Phenoxyethoxy)ethoxy cosubstituents on the cyclotriphosphazene unit of the first comonomer were utilized to simultaneously facilitate lithium cation transport and introduce hydrophobicity into the polymer electrolyte. 4-(Lithiumcarboxalato)phenoxy side groups were linked to the rings of a second comonomer to provide tethered anions with mobile lithium cations and to increase the dimensional stability of the final polymers. The synthesis of norbornenemethoxy-based cyclotri-phosphazene monomers, their ring-opening metathesis polymerization, deprotection and lithiation of the 4-(propylcarboxalato)phenoxy side groups, and the characterization of the polymers are discussed to illustrate the dependence of ion transport and hydrophobic properties on the polymer composition.

Original languageEnglish (US)
Pages (from-to)4486-4492
Number of pages7
JournalChemistry of Materials
Volume18
Issue number18
DOIs
StatePublished - Sep 5 2006

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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