Operation of PEFC using composite sheets composed of phosphosilicate gels and thermally stable organic polymers |
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| Institution: | 1. Toyohashi University of Technology, Tempaku, 441-8580 Toyohashi, Japan;2. Graduate School of Engineering, Osaka Prefecture University, 599-8531 Sakai, Japan;1. Department of Polymer and Fiber Engineering, Auburn University, Auburn, AL 36849, USA;2. Department of Materials Engineering, The University of Texas at Dallas, Richardson, TX 75080, USA;1. Departamento de Física, Universidad Nacional del Sur, Av. Alem 1253, 8000 Bahía Blanca, Argentina;2. IFISUR (UNS-CONICET), Av. Alem 1253, 8000 Bahía Blanca, Argentina;1. Institute of Material Physics, Key Laboratory of Display Materials and Photoelectric Devices, Ministry of Education, and Tianjin Key Laboratory for Photoelectric Materials and Devices, Tianjin University of Technology, Tianjin 300384, PR China;2. School of Science, Tianjin University of Technology and Education, Tianjin 300222, PR China |
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| Abstract: | Thermally stable, flexible, and proton conductive composite sheets have been prepared from phosphosilicate (P2O5–SiO2, P/Si = 1 in mole ratio) gel powder and several kinds of organic polymers. The organic polymers examined were polyimide (PI), polyamideimide (PAI), polyvinylidene fluoride (PVdF) and styrene–ethylene–butylenes–styrene elastomer (SEBS). PI and PAI effectively improved the chemical durability of the composite sheets by depressing the leaching of phosphoric acid from the gel. PVdF and SEBS provided the composite sheets with an excellent flexibility. Fuel cells using the membrane electrode assembly (MEA) composed of the composite sheet as an electrolyte and Pt-loaded carbon paper sheets as electrodes operated at temperatures in the range from room temperature to medium temperatures (∼ 150 °C). |
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