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 language | English (US) |
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Pages (from-to) | 4486-4492 |
Number of pages | 7 |
Journal | Chemistry of Materials |
Volume | 18 |
Issue number | 18 |
DOIs | |
State | Published - Sep 5 2006 |
All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Chemical Engineering(all)
- Materials Chemistry