Performance of a poly(2,5-benzimidazole) membrane based high temperature PEM fuel cell in the presence of carbon monoxide |
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| Affiliation: | 1. Laboratoire de Stockage de l''Electricité, Institut National de l’Energie Solaire, Commissariat à l''Energie Atomique et Energies Alternatives (CEA-Liten), 50, avenue du Lac Léman - LYNX 3, BP332, 73377 Le Bourget du Lac, France;2. Laboratoire d''Electrochimie et de Physico-chimie des Matériaux et des Interfaces (LEPMI) UMR 5291 CNRS/Grenoble – INP/UJF/UdS, 1130, rue de la piscine, BP 75, 38402 Saint Martin d''Hères, France;1. WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, Glasgow G1 1XL, UK;2. C-Tech Innovation Ltd, Capenhurst, Chester CH1 6EH, UK;3. Electrochemical Innovation Lab., Department of Chemical Engineering, UCL, London WC1E 7JE, UK |
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| Abstract: | The performance of a poly(2,5-benzimidazole) (ABPBI) membrane based high temperature PEM fuel cell in presence of carbon monoxide, at various temperatures is reported here. The ABPBI was synthesized by polymerization of 3,4-diaminobenzoic acid in a polymerization medium containing methanesulfonic acid (CH3SO3H) and phosphorous pentoxide (P2O5). The ABPBI membranes were characterized by fourier transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM). A maximum conductivity of 0.026 S cm−1 at 180 °C was obtained for the membrane doped with 1.2 molecules of phosphoric acid (H3PO4) per polymer repeat unit. Fuel cell performance was evaluated using dry hydrogen/oxygen gases and was comparable with that reported in the literature. Performance of a single cell at different temperatures was studied with 0.48 and 1.0 vol.% of CO in the hydrogen fuel. The studies lead to the conclusion that CO poisoning is not a serious problem above 170 °C. Performance of the fuel cell operating at 210 °C is not at all affected by 1.0 vol.% of CO in the hydrogen feed. |
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