Abstract
We described a new concept, carbon paper-free membrane electrode assembly (MEA) fabricated from Nafion membrane and multi-walled carbon nanotubes-based electrocatalyst, in which platinum nanoparticles were deposited on carbon nanotubes after coating with pyridine–polybenzimidazole (PyPBI). Polymer-coated carbon nanotubes served as platinum nanoparticles support and current collector in carbon paper-free MEA. The fabricated carbon paper-free MEA was systematically studied by in situ cyclic voltammetry, SEM and fuel cell test. Pt utilization efficiency of carbon paper-free MEA improved with decreasing in Pt loading and reached 62% with 0.1 mgPt cm−2. Meanwhile, the mass power density reached 1.1 W mg −1Pt , which was comparable to that of MEA with carbon paper. Fuel cell performance maintained 50% after 100000 startup–shutdown cycles, suggesting that carbon paper-free MEA was applicable in real fuel cell operation. To the best of our knowledge, this is the first study of carbon paper-free MEA in polymer electrolyte fuel cells.
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The project was supported by the Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) (CUG170615).
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Luo, F., Ling, Y., Zhang, Q. et al. Carbon paper-free membrane electrode assembly fabricated from a Pt electrocatalyst supported on multi-walled carbon nanotubes. J Mater Sci 52, 8412–8420 (2017). https://doi.org/10.1007/s10853-017-1081-y
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DOI: https://doi.org/10.1007/s10853-017-1081-y