High Proton Conductivity of Water Channels in a Highly Ordered Nanowire


  • H.J. thanks for support from the National Institutes of Health (grant number 1R01NS057366) and the National Natural Science Foundation of China (grant number 20728506/B05).


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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.