Enhanced ion conductivity of sulfonated poly(arylene ether sulfone) block copolymers linked by aliphatic chains constructing wide-range ion cluster for proton conducting electrolytes |
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| Affiliation: | 1. Department of Life Science, Jeonbuk National University, Jeonju, Jeollabuk-do, 54896, Republic of Korea;2. Department of Energy Storage/Conversion Engineering of Graduate School, Hydrogen and Fuel Cell Research Centre, Jeonbuk National University, Jeonju, Jeollabuk-do, 54896, Republic of Korea;1. Chair of Production Engineering of E-Mobility Components (PEM), RWTH Aachen University, Bohr 12, Aachen, 52072, Germany;2. Zentrum für BrennstoffzellenTechnik GmbH (ZBT), Carl-Benz-Straße 201, Duisburg, 47057, Germany;3. PEM Motion, PEM Aachen GmbH, Karl-Friedrich-Str. 60, Aachen, 52072, Germany;1. Hubei Engineering & Technology Research Center for Functional Materials from Biomass, School of Chemistry and Material Science, Hubei Engineering University, Xiaogan, Hubei, 432000, China;2. Hubei Collaborative Innovation Center for Biomass Conversion and Utilization, Hubei Engineering University, Xiaogan, Hubei, 432000, China;3. Department of Fashion & Design, Lee-Ming Institute of Technology, New Taipei City, 243, Taiwan;1. R&D Education Center for Whole Life Cycle R&D of Fuel Cell Systems, Chonbuk National University, Jeollabuk-do, 54896, Republic of Korea;2. Department of Life Science, Graduate School of Department of Energy Storage/Conversion Engineering, Hydrogen and Fuel Cell Research Center, Chonbuk National University, Jeollabuk-do 54896, Republic of Korea;3. R&D Center for CANUTECH, Business Incubation Center, Department of Bioenvironmental Chemistry, Chonbuk National University, Jeollabuk-do 54896, Republic of Korea;1. Department of Energy Storage & Conversion Engineering, Chonbuk National University, Jeonju, Jeollabuk-do 54896, Republic of Korea;2. Department of Mineral Resources & Energy Engineering, Chonbuk National University, Jeonju, Jeollabuk-do 54896, Republic of Korea;3. Korea Electric Power Corporation Research Institute, 105 Munji-ro, Yuseong-gu, Daejeon 34056, Republic of Korea;4. Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea;5. Department of Life Science and Hydrogen and Fuel Cell Research Center, Chonbuk National University, Jeollabuk-do 54896, Republic of Korea;1. Division of Renewable Energy & Semiconductor Engineering, Uiduk University, Gyeongju 780-713, Republic of Korea;2. Energy Engineering Department, Dankook University, Cheonan 330-717, Republic of Korea;1. Department of Bioenvironmental Chemistry, Chonbuk National University, Jeollabuk-do 54896, Republic of Korea;2. R&D Center for CANUTECH, Business Incubation Center of Chonbuk National University, Jeollabuk-do 54896, Republic of Korea;3. Graduate School, Department of Energy Storage/Conversion Engineering, Hydrogen and Fuel Cell Research Center, Chonbuk National University, Jeollabuk-do 54896, Republic of Korea;4. Department of Life Science, Chonbuk National University, Jeollabuk-do 54896, Republic of Korea |
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| Abstract: | A series of sulfonated poly(arylene ether sulfone) block copolymers with aliphatic chains (SPAES-LA) to lend structural flexibility in the polymer backbone have been synthesized to prepare proton exchange membranes (PEMs) showing improved electrochemical performance and dimensional/oxidative stabilities. The SPAES-LAs, bearing different hydrophilic/hydrophobic segment lengths, are prepared via polycondensation and sulfonation reactions. The sulfonation reaction occurs in specific fluorenylidene units by using chlorosulfonic acid. The SPAES-LA membrane, fabricated by solvent casting method, exhibits remarkable dimensional/thermal stabilities. Moreover, proton conductivity of as-prepared SPAES-LA membranes demonstrates significant improvement with expansion of ion clusters which is due to the increased hydrophilic volume ratio. In particular, the SPAES-LA-X12Y28 membrane exhibited heightened proton conductivity of 158.4 mS cm?1 as well as suitable dimensional stability and durability towards radical oxidation, due to an effective well-defined hydrophilic-hydrophobic interface. Furthermore, H2/O2 fuel cell performance using SPAES-LA-X12Y28 membrane achieves a maximum power density of 232.02 mW cm?2, a result which points out that SPAES-LA membranes show great potential for applications of polymer electrolyte membrane. |
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| Keywords: | Poly(arylene ether sulfone)s Sulfonation Ion exchange capacity Dimensional stability Fuel cells |
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