Anion exchange membranes (AEMs) with perfluorinated and polysulfone backbones with different cation chemistries

Christopher G. Arges, Min Suk Jung, Graham Johnson, Javier Parrondo, Vijay Ramani

Research output: Chapter in Book/Report/Conference proceedingConference contribution

22 Scopus citations

Abstract

Perfluorinated (PF) and polysulfone (PSF) backbones have been functionalized with multiple cation chemistries with varying basicities to prepare anion exchange membranes. The different cation and polymer backbone chemistries were evaluated to ascertain their influence on cation stability in alkaline environments, ionic conductivity, water uptake, and fuel cell performance. Experimental evidence from the several cations/backbones studied support the following conclusions: i.) Basicity of the cation is an appropriate heuristic for assessing ionic conductivity, but it is not always appropriate for comparing alkaline stability across cations with different inorganic atoms. ii.) Phosphonium cations with similar or greater basicity than ammonium cations are observed to have less water uptake, but degrade much more rapidly since they favor the production of reactive ylides. iii.) PF backbones with a sulfonyl group adjacent to the cation site exhibit a higher rate of cation site degradation in comparison to PSF backbones that have a benzyl group adjacent to the cation.

Original languageEnglish (US)
Title of host publicationPolymer Electrolyte Fuel Cells 11
Pages1795-1816
Number of pages22
Edition1
DOIs
StatePublished - 2011
Event11th Polymer Electrolyte Fuel Cell Symposium, PEFC 11 - 220th ECS Meeting - Boston, MA, United States
Duration: Oct 9 2011Oct 14 2011

Publication series

NameECS Transactions
Number1
Volume41
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

Other11th Polymer Electrolyte Fuel Cell Symposium, PEFC 11 - 220th ECS Meeting
Country/TerritoryUnited States
CityBoston, MA
Period10/9/1110/14/11

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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