Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 39, Issue 6, Pages 2639-2648Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2013.11.049
Keywords
Proton exchange membrane; Sulfonated poly(arylene ether sulfone)s; Conductivity; Stability; Membrane electrode assembly
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Funding
- National Natural Science Foundation of China [21173039]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20110075110001]
- Shanghai Municipal Education Commission
- Graduate Degree Thesis Innovation Foundation of Donghua University
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A novel series of sulfonated poly(arylene ether sulfone)s (SPAESs) containing fluorophenyl pendant groups are successfully developed and their membranes are evaluated in low-temperature proton exchange membrane fuel cells. The SPAESs are synthesized from 4,4'-dichlorodiphenylsulfone (DCDPS), 3,3'-disulfonate-4,4'-dichlorodiphenylsulfone (SDCDPS), and (4-fluorophenyl)hydroquinone by nucleophilic aromatic substitution poly-condensation. The structure and properties of SPAESs membranes are characterized using H-1-NMR, EA, FT-IR, TG, and DSC, along with the proton conductivity, water uptake, ion exchange capacity and chemical stability. A maximum proton conductivity of 0.35 S cm(-1) at 90 degrees C is achieved for SPAES membrane with 50% SDCDPS. These SPAES membranes display high dimensional stability and oxidative durability, due to the introduction of fluorophenyl pendant groups on the polymer backbone. The fuel cell performances of the MEAs with SPAES reaches an initial power density of 120.6 mW cm(-2) at 30 degrees C, and greatly increases to 224.3 mW cm(-2) at 80 degrees C using H-2 and O-2 gases. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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