Quaternary Phosphonium-Based Polymers as Hydroxide Exchange Membranes



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A new class of hydroxide exchange membranes (HEMs) is prepared by using a quaternary phosphonium-based polymer. The membranes display desirable properties, most notably a high conductivity. A corresponding fuel cell exhibits the highest HEM fuel cell performance to date and shows a better intrinsic catalyst-activity compared with state-of-the-art proton exchange membrane fuel cells.