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Keywords:

  • energy conversion;
  • conducting materials;
  • fuel cells;
  • membranes;
  • polymers
Thumbnail image of graphical abstract

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.