Effect of bulky cations on the function and stability of anion exchange membranes
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A major advantage of alkaline fuel cells (AFCs), relative to well-established acidic fuel cells, is their enhanced reaction kinetics permitting the use of less costly, non-noble-metal catalysts. Developing anion exchange membranes (AEMs) for AFCs that are stable under high pH operating conditions is a significant challenge. Insufficient stability of the widely used quaternary ammonium (QA) cation is the main reason attenuate membranes lifetime. Ion conduction in AEMs is intrinsically slower than in proton exchange membranes is another factor impedes AEMs wide-scale application. Therefore, ...