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Published on: October 20, 2023
Ordered Proton Transport Channels in a Layered Host-Guest Crystal for High-Performance Fuel Cells
Jincheng Jin1, Zeming Huang1, Shantao Li1
1Anhui Province Key Laboratory of Functional Coordinated Complexes for Materials Chemistry and Application, School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, P. R. China.
Abstract:
Developing solid electrolytes with high intrinsic proton conductivity over a broad temperature range is crucial for proton exchange membrane fuel cells. We report a new layered cadmium chlorophosphate crystal, (C3N2H5)[CdCl(H3/2PO4)]2 (CdClPO4-ImH), featuring highly ordered one-dimensional proton transport channels formed by host-guest synergy between imidazolium cations and inorganic layers. Structural and theoretical analyses revealed a continuous hydrogen-bonding network that promotes efficient proton hopping. The material shows excellent proton conductivity from -20 to 90 °C, reaching 2.57 × 10-2 S cm-1 at 90 °C and 95% relative humidity (RH). An undoped intrinsic membrane delivered a peak power density of 104 mW cm-2 in a H2/O2 fuel cell.
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