Mesoporous hollow silica spheres as micro-water-tanks in proton exchange membranes |
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| Affiliation: | 1. Institute of Fuel Cell, School of Mechanical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd., Shanghai, 200240, China;2. Key Laboratory of Power Machinery and Engineering (Shanghai Jiao Tong University), Ministry of Education, China;1. LED-IT Fusion Technology Research Center, Yeungnam University, Gyeongsan 38541, Republic of Korea;2. Department of Mechanical Engineering, Chadalawada Ramanamma Engineering College, Tirupati 517-506, India;3. School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea;1. Institute of Building Construction and Technology, TU Wien, Karlsplatz 13/206-4, 1040 Vienna, Austria;2. Department of Orthopaedic Surgery, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria;3. Department of Mechanical Engineering, The University of Memphis, Memphis, TN 38152, USA;4. Institute of Solid State Physics, TU Wien, Karlsplatz 13/138-4, 1040 Vienna, Austria;1. Institute of Continuous Media Mechanics UB RAS, Perm, Russian Federation;2. Perm State National Research University, Perm, Russian Federation;3. Leibniz Institute of Polymer Research Dresden, D-01069 Dresden, Germany;1. School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China;2. Institute of Forensic Science, Criminal Police Corps of Chongqing Public Security Bureau, Chongqing 400021, China;3. Chongqing Academy of Science and Technology, Chongqing 401123, China |
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| Abstract: | In order to decrease the swelling of Nafion® and reduce the dependency of proton conductivity on high relative humidity (RH), mesoporous hollow silica spheres were synthesized and dispersed in Nafion matrix as micro-water-tanks in the proton exchange membranes (PEM). The morphologies of MHSi and Nafion/MHSi composite membranes are characterized by SEM and TEM. The effects of MHSi on water uptake, swelling, dehydration rate and proton conductivity of the composite membranes were investigated. The results show that, with a suitable portion of MHSi in the membrane, composite PEMs with enhanced water uptake, reduced swelling and improved proton conductivity are obtained. |
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| Keywords: | Fuel cell Proton exchange membrane Water retention Swelling Dehydration |
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