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Title: Semi-interpenetrating polymer network proton exchange membranes with narrow and well-connected hydrophilic channels
Authors: Fang, C.
Toh, X.N.
Yao, Q.
Julius, D.
Hong, L. 
Lee, J.Y. 
Keywords: Direct methanol fuel cell
Poly(2,6-dimethyl-1,4-phenylene oxide)
Proton exchange membrane
Semi-interpenetrating polymer network
Issue Date: 15-Mar-2013
Citation: Fang, C., Toh, X.N., Yao, Q., Julius, D., Hong, L., Lee, J.Y. (2013-03-15). Semi-interpenetrating polymer network proton exchange membranes with narrow and well-connected hydrophilic channels. Journal of Power Sources 226 : 289-298. ScholarBank@NUS Repository.
Abstract: Four series of semi-interpenetrating polymer network (SIPN) membranes are fabricated by thermally cross-linking aminated BPPO (brominated poly(2,6-dimethyl-1,4-phenylene oxide)) with different epoxide cross-linkers in the presence of sulfonated PPO (SPPO). The cross-link structure and hydrophobicity are found to impact the membrane morphology strongly - smaller and more hydrophobic cross-links form narrow and well-connected hydrophilic channels whereas bulky and less hydrophobic cross-links form wide but less-connected hydrophilic channels. The membranes of the former can support facile proton transport and suppress methanol crossover to result in higher proton conductivity and lower methanol permeability than the membranes of the latter. The membranes are also fabricated into membrane electrode assemblies (MEAs) and tested in single-stack direct methanol fuel cells (DMFCs). It is found that some of these SIPN membranes can surpass Nafion® 117 in maximum power density, demonstrating their potential as a proton exchange membrane (PEM) for the DMFCs. © 2012 Published by Elsevier B.V. All rights reserved.
Source Title: Journal of Power Sources
ISSN: 03787753
DOI: 10.1016/j.jpowsour.2012.11.001
Appears in Collections:Staff Publications

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