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Joo, Sang Hoon
Nanomaterials & Catalysis Lab
Research Interests
  • Catalyst, energy conversion, fuel cells, electrolyzer, ORR, HER, OER

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Functionalized carbon nanotube-poly(arylene sulfone) composite membranes for direct methanol fuel cells with enhanced performance

Cited 40 times inthomson ciCited 41 times inthomson ci
Title
Functionalized carbon nanotube-poly(arylene sulfone) composite membranes for direct methanol fuel cells with enhanced performance
Author
Joo, Sang HoonPak, ChanhoKim, Eun AhLee, Yoon HoChang, HyukSeung, DoyoungChoi, Yeong SukPark, Jong-BongKim, Tae Kyoung
Keywords
Carbon nanotubes; Composites; Direct methanol fuel cell (DMFC); Poly(arylene sulfone)s; Polymer electrolyte membrane; Power density
Issue Date
2008-05
Publisher
ELSEVIER SCIENCE BV
Citation
JOURNAL OF POWER SOURCES, v.180, no.1, pp.63 - 70
Abstract
A new type of composite membrane, consisting of functionalized carbon nanotubes (CNTs) and sulfonated poly(arylene sulfone) (sPAS), is prepared for direct methanol fuel cell (DMFC) applications. The CNTs modified with sulfonic acid or PtRu nanopaticles are dispersed within the sPAS matrix by a solution casting method to afford SO3CNT-sPAS or PtRu/CNT-sPAS composite membranes, respectively. Characterization of the composite membranes reveals that the functionalized CNTs are homogeneously distributed within the sPAS matrix and the composite membranes contain smaller ion clusters than the neat sPAS. The composite membranes exhibit enhanced mechanical properties in terms of tensile strength, strain and toughness, which leads to improvements in ion conductivity and methanol permeability compared with the neat sPAS membrane. In DMFC performance tests, the use of a PtRu/CNT-sPAS membrane yields high power density compared with the neat sPAS membrane, which demonstrates that the improved properties of the composite membranes induce an increase in power density. The strategy for CNT-sPAS composite membranes presented in this work can potentially be extended to other CNT-polymer composite systems.
URI
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DOI
10.1016/j.jpowsour.2008.02.014
ISSN
0378-7753
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ECHE_Journal Papers
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