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Modified sulfonated Poly(arylene ether) multiblock copolymers containing highly sulfonated blocks for polymer electrolyte membrane fuel cells

Title
Modified sulfonated Poly(arylene ether) multiblock copolymers containing highly sulfonated blocks for polymer electrolyte membrane fuel cells
Authors
Yoo, TaehyunAziz, Md. AbdulOh, KwangjinShanmugam, Sangaraju
DGIST Authors
Yoo, Taehyun; Oh, Kwangjin; Shanmugam, Sangaraju
Issue Date
2017
Citation
Journal of Membrane Science, 542, 102-109
Type
Article
Article Type
Article
ISSN
0376-7388
Abstract
The sulfonated poly(arylene ether) (SPAE) multiblock copolymers composed of densely sulfonated hydrophilic blocks were designed and fabricated through aromatic nucleophilic substitution reaction. The modified SPAE (mSPAE) membrane showed a well phase separated morphology as revealed by transmission electron microscopy (TEM) studies. The dense sulfonic acid groups in mSPAE lead to higher ion exchange capacity and water uptake, resulting in well phase separated morphology and superior proton conductivity (247.18 mS cm−1) compared with the pristine SPAE membrane (95.73 mS cm−1) and a commercial Nafion (NRE-212) membrane (111.40 mS cm−1) under fully humid condition at 80 °C. The mSPAE membrane showed improved fuel cell performance compared with pristine SPAE and NRE-212 membranes. The mSPAE membrane showed a current density of 1386 mA cm−2 at 0.6 V under 100% hydrated condition, whereas the pristine SPAE and NRE-212 membranes showed 766 and 1012 mA cm−2 current density under the same condition. A maximum power density of 928 mW cm−2 was achieved for mSPAE membrane, which was much higher compared with the pristine SPAE (518 mA cm−2) and Nafion-212 (688 mA cm−2) membranes indicating that mSPAE membrane would be a potential replacement of the Nafion-212 membrane. © 2017 Elsevier B.V.
URI
http://hdl.handle.net/20.500.11750/4461
DOI
10.1016/j.memsci.2017.08.008
Publisher
Elsevier B.V.
Related Researcher
Files:
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Collection:
Energy Science and EngineeringAdvanced Energy Materials Laboratory1. Journal Articles
Convergence Research Center for Wellness1. Journal Articles


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