Poly(phenylene)-based anion exchange membranes for alkaline fuel cells

M. R. Hibbs, C. H. Fujimoto, C. J. Cornelius

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

6 Scopus citations

Abstract

Cationic polymer membranes that conduct free anions comprise an enabling research area for alkaline membrane fuel cells and other solid-state electrochemical devices that operate at high pH. The synthesis of anion exchange membranes based on a poly(phenylene) backbone prepared by a Diels-Alder reaction is demonstrated as a potential material for alkaline fuel cells. The poly(phenylene)s have benzylic methyl groups that are converted to bromomethyl groups by a radical reaction. Cationic polymers result from conversion of the bromomethyl groups to ionic moieties by quaternization with trimethylamine in the solid state. The conversion to benzyltrimethyl ammonium groups is incomplete as evidenced by the differences between the IEC values measured by titration and the theoretical IECs based on 1H NMR measurements. The anion exchange membranes formed from these polymers have hydroxide ion conductivities as high as 50 mS/cm in liquid water and they are stable under highly basic conditions at elevated temperatures.

Original languageEnglish (US)
Title of host publicationSeparators and Membranes for Batteries, Capacitors, Fuel Cells, and Other Electrochemical Systems
Pages89-97
Number of pages9
Edition30
DOIs
StatePublished - 2009
EventSeparators and Membranes for Batteries, Capacitors, Fuel Cells, and Other Electrochemical Systems - 215th ECS Meeting - San Francisco, CA, United States
Duration: May 24 2009May 29 2009

Publication series

NameECS Transactions
Number30
Volume19
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Conference

ConferenceSeparators and Membranes for Batteries, Capacitors, Fuel Cells, and Other Electrochemical Systems - 215th ECS Meeting
CountryUnited States
CitySan Francisco, CA
Period5/24/095/29/09

ASJC Scopus subject areas

  • Engineering(all)

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