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Keywords:

  • fuel cells;
  • hydrogen bonds;
  • proton transport;
  • self-assembly;
  • water channels
Thumbnail image of graphical abstract

A proton-conductive material based on a crystalline assembly of trimesic acid and melamine (TMA⋅M, see picture) is reported. Because of the ordered structure of the assembly, the water-saturated proton conductivity for the TMA⋅M assembly is 5.5 S cm−1, which is the highest proton conductivity measured to date. This exceptionally high conductivity and low-cost fabrication of the material make applications feasible for fuel-cell devices.