Synthetic Strategies for Controlling the Morphology of Proton Conducting Polymer Membranes

Fuel Cells - Tập 5 Số 2 - Trang 171-186 - 2005
Yuan Yang1, Steven Holdcroft2
1Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC, Canada, V5A 1S6, Canada
2Institute for Fuel Cell Innovation, National Research Council Canada, 3250 East Mall, Vancouver, BC, Canada, V6T 1W5, Canada

Tóm tắt

AbstractThe nanostructure and morphology of proton conducting polymers is of considerable interest in the search for next generation materials and optimization of existing ones. Synthetic methodologies for tailoring molecular structures that promote nanoscopic phase separation of ionic and non‐ionic domains, and the effect of phase separation on parameters such as proton conductivity, are considered. Rather than distinguish proton conducting polymers according to chemical class, they are categorized under sub‐headings of random, block, and graft copolymers. The synthetic methodology available to access archetypal polymer structures is dependent on the nature of the monomers and restrictive compared to conventional non‐ionic polymer systems. Irrespective of the methodology, ionic aggregation and phase separation are consistently found to play an important role in the proton conductivity of low ion exchange capacity (IEC) membranes, but less of a role in highIECmembranes. Significant research is required to further develop relationships between polymer architecture, morphology, and electrolytic properties.

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Fuel Cells

Tập 5 Số 2

171-186

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