Abstract
We report on the crystal structures of two hydrates of benzenehexasulfonic acid, its water sorption isotherm, temperature- and humidity-dependent conductivity, along with 1H NMR studies. At comparable humidities and temperatures, this crystalline material shows conductivity similar to Nafion, which conducts protons via liquid water channels. We believe that the presented discovery of fast protonic conductivity in benzenehexasulfonic acid at low humidities is encouraging for further efforts in developing highly sulfonated polymers as membranes for fuel cells.
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Acknowledgment
The funding for this work was provided by the US Department of Energy, US National Science Foundation, Ohio Department of Development, Farris Family Innovation Fund and Kent State University.
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Garanin, E.M., Tolmachev, Y.V., Bunge, S.D. et al. Fast protonic conductivity in crystalline benzenehexasulfonic acid hydrates. J Solid State Electrochem 15, 549–560 (2011). https://doi.org/10.1007/s10008-010-1094-9
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DOI: https://doi.org/10.1007/s10008-010-1094-9