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Issue 29, 2017

The next generation solid acid fuel cell electrodes: stable, high performance with minimized catalyst loading

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Abstract

Low electrode impedance paired with low catalyst loading in intermediate and low temperature fuel cells is extremely difficult to achieve, posing a major obstacle to commercialization. Here we demonstrate a scalable and facile route to obtain nanostructured composite solid acid fuel cell electrodes consisting of Pt decorated carbon nanotubes and CsH2PO4 microparticles as the electrolyte. Electrochemical impedance measurements in humidified hydrogen at 240 °C show very low 0.05 Ω cm2 area normalized electrode resistance, with a Pt loading of only 0.41 mgPt cm−2. This is a reduction of the Pt loading by more than one order of magnitude paired with even lower electrode impedance values compared to the current state-of-the-art in literature. Fuel-cell measurements show remarkably stable electrode performance over a 17 h period with a final degradation rate of 0.1% h−1.

Graphical abstract: The next generation solid acid fuel cell electrodes: stable, high performance with minimized catalyst loading

Article information


Submitted
28 Apr 2017
Accepted
30 Jun 2017
First published
30 Jun 2017

J. Mater. Chem. A, 2017,5, 15021-15025
Article type
Communication

The next generation solid acid fuel cell electrodes: stable, high performance with minimized catalyst loading

F. P. Lohmann, P. S. C. Schulze, M. Wagner, O. Naumov, A. Lotnyk, B. Abel and Á. Varga, J. Mater. Chem. A, 2017, 5, 15021 DOI: 10.1039/C7TA03690F

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