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Mesoporous polybenzimidazole doped with phosphoric acid shows enhanced proton conductivity compared to an equivalent, nonporous membrane. The introduction of a defined nanostructure into crosslinked poly (benzimidazole) /phosphoric acid composites is thus a promising approach towards membranes of high temperature stability suitable for fuel cell applications. Supporting information for this article is available on the WWW under http: //www. wiley-vch. de/contents/jc₂089/2008/adma200703159ₛ. pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.
Weber et al. (Tue,) studied this question.