An integrated composite membrane electrode assembly (ICMEA) and its application in small H2/air fuel cells |
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| Affiliation: | 1. Institute of Nuclear and New Energy Technology (INET), Room A314, Energy Science Building, Tsinghua University, Beijing 100084, PR China;2. Beijing Century Star Micropower System Ltd., Beijing, PR China;1. Department of Chemistry, University of the Free State, P.O. Box 339, Bloemfontein 9300, South Africa;2. Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okólna 2, 50-422 Wroclaw, Poland;3. Department of Physics, University of the Free State, P.O. Box 339, Bloemfontein 9300, South Africa;1. Secció de Química Inorgànica, Departament de Química Inorgànica i Orgànica, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain;2. Institut de Biomedicina (IBUB), Universitat de Barcelona, Barcelona, Spain;3. Laboratori de Química Orgànica, Facultat de Farmàcia, Universitat de Barcelona, Av. Joan XXIII 27-31, 08028 Barcelona, Spain;4. Department of Chemistry, Government College University, Faisalabad, Pakistan;5. Biomed Division LEITAT Technological Center, Parc Científic, Edifici Hèlix, Baldiri Reixach 15-21, 08028 Barcelona, Spain;6. Departament de Bioquímica i Fisiologia, Secció de Bioquímica i Biologia Molecular, Facultat de Farmàcia, Av. Joan XXIII, 27-31, 08028 Barcelona, Spain;1. Department of Mechanical and Control Engineering, Tokyo Institute of Technology, 2-12-1, O-okayama, Meguro-ku, Tokyo 152-8550, Japan;2. School of Engineering, Department of Mechanical Engineering, Tokyo Institute of Technology, Japan;3. Research Fellow of Japan Society for the Promotion of Science, Japan |
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| Abstract: | The commercialization of small fuel cells requires both the reduction of components cost and improvement of power density. To meet these requirements, we proposed the concept of an integrated composite membrane electrode assembly (ICMEA) which integrates the functions of conventional MEA, flow field, and current collector. Compared to conventional ones, it is advanced in simplification of fuel cell components, higher mechanical strength and dimensional stability, reduction in volume and weight, lower clamping pressure, and lower cost. A 200 μm thick ICMEA was successfully fabricated. A sandwiched structure was fabricated by attaching an e-PTFE substrate with two finely porous thin metal sheets on each side. After the impregnation of polymer electrolyte, the porous PTFE was filled with the polymer electrolyte and was bounded with the two metal sheets. Catalyst layer was directly coated on the surface of the composite membrane. At ambient conditions, the achieved maximum power density of ICMEA in H2/air fuel cell was nearly 80 mW cm?2. |
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