Enhanced conductivity in polyanion-containing polybenzimidazoles. Improved materials for proton-exchange membranes and PEM fuel cells |
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| Affiliation: | 1. Institut de Ciència de Materials de Barcelona (CSIC), Campus UAB, E-08193 Bellaterra (Barcelona), Spain;2. Institut Quı́mic de Sarrià, Universitat Ramon Llull, Vı́a Augusta 390, E-08017 Barcelona, Spain;1. Fuel Cell Institute, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia;2. Petroleum Engineering Department, Universiti Teknologi PETRONAS, Seri Iskandar, 31750 Tronoh, Perak, Malaysia;3. King Abdullah Institute for Nanotechnology, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia;4. Australian Institute for Bioengineering and Nanotechnology (AIBN), University of Queensland, Brisbane, Queensland 4072, Australia;5. Industrial Chemistry Research Laboratory, Division of Applied Chemistry, University of Qom, Qom, Iran;6. Advanced Membrane Technology Research Centre (AMTEC), Universiti Teknologi Malaysia, 81310 Johor Bahru, Johor, Malaysia;7. Faculty of Science, Technology, Engineering and Mathematics, INTI International University, 71800 Nilai, Negeri Sembilan, Malaysia;8. Department of Mechanical Engineering, Islamic Azad University, Mashhad Branch, Mashhad, Iran;9. National Center for Water Treatment and Desalination Technology, KACST, P.O. Box 6086, Riyadh 11442, Saudi Arabia;1. School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China;2. Beijing Qintian Science & Technology Development Co., Ltd., China |
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| Abstract: | ![]()
In an effort to develop improved Proton Exchange Membranes for Polymeric Fuel cells two different forms of polyanion inclusion in poly(2,5-benzimidazole) (ABPBI) have been carried out. Namely by (i) sulfonation of pre-formed polymer membranes and (ii) by addition of inorganic phosphomolybdic acid to form hybrid ABPBI–PMo12 membranes. In both cases we have detected an increased proton conductivity of the resulting membranes, associated to an enhanced capacity of the polyanion-modified materials to uptake phosphoric acid (in comparison with previously known ABPBI or even commercial PBI membranes). These new membranes are stable up to 200 °C and feature high conductivities at these temperatures, which makes them promising candidates for higher-temperature PEM Fuel Cells. |
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