期刊
JOURNAL OF POWER SOURCES
卷 173, 期 1, 页码 162-165出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2007.08.006
关键词
polyelectrolyte complexes; chitosan; phosphotungstic acid; methanol permeation; proton-conducting
Surface-modified Nafion (R) membrane was prepared by casting proton-conducting polyelectrolyte complexes on the surface of Nafion (R). The casting layer is homogeneous and its thickness is about 900 nm. The proton conductivity of modified Nafion (R) is slightly lower than that of plain Nafion (R); however, its methanol permeability is 41% lower than that of plain Nafion (R). The single cells with modified Nafion (R) exhibit higher open circuit voltage (OCV = 0.73 V) and maximal power density (P-max = 58 mW cm(-2)) than the single cells with plain Nafion (R) (OCV = 0.67 V, P x = 49 mW cm-2). It is a simple, efficient, cost-effective approach to modifying Nafion (R) by casting proton-conducting materials on the surface of Nafion (R). (C) 2007 Elsevier B.V. All rights reserved.
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