期刊
JOURNAL OF POWER SOURCES
卷 194, 期 2, 页码 730-736出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2009.06.022
关键词
Polyvinyl alcohol; Chitosan; Nafion (R) ionomer; Methanol permeability; Proton conductivity; Direct methanol fuel cells
资金
- Chinese High Technology Research Program [2007AA05Z159]
- Chinese Nature Science Foundation [20433060]
- Institute for Fuel Cell Innovation, National Research Council of Canada (NRC-IFCI)
A series of cost-effective, proton-conducting composite membranes, comprising of Nafion (R) ionomer, chitosan (CS). and polyvinyl alcohol (PVA), is successfully prepared. By taking advantage of the strong electrostatic interactions between Nafion (R) ionomer and CS component, Nafion ionomer is effectively implanted into the PVA/CS composite membranes, and improves proton conductivity of the PVA/CS composite membranes. Furthermore, this effect dramatically depends on the composition ratio of PVA/CS, and the optimum conductivity is obtained at the PVA/CS ratio of 1:1. The developed composite membranes exhibit much lower methanol permeability compared with the widely used Nafion (R) membrane, indicating that these novel membranes have great potential for direct methanol fuel cells (DMFCs). (C) 2009 Elsevier B.V. All rights reserved.
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