Self-assembled polyelectrolyte multilayered films on Nafion with lowered methanol cross-over for DMFC applications

被引：65

作者：

Deligoz, Huseyin ^{[1
]}

Yilmazturk, Serpil ^{[1
]}

Karaca, Tuba ^{[1
]}

Ozdemir, Hasan ^{[1
]}

Koc, S. Naci ^{[1
]}

Oksuzomer, Faruk ^{[1
]}

Durmus, Ali ^{[1
]}

Gurkaynak, M. Ali ^{[1
]}

机构：

[1] Istanbul Univ, Fac Engn, Dept Chem Engn, TR-34320 Avcilar, Turkey

来源：

JOURNAL OF MEMBRANE SCIENCE | 2009年 / 326卷 / 02期

关键词：

Direct methanol fuel cell; Layer by layer (LbL); Membrane Methanol permeation; Proton conductivity; Self-assembly; PROTON-EXCHANGE MEMBRANES; TRANSPORT;

D O I：

10.1016/j.memsci.2008.10.055

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The paper is concerned with the deposition of self-assembled polyelectrolyte multilayer on Naflon membrane by layer-by-layer (LbL) technique with lowered methanol cross-over for direct methanol fuel cell (DMFC) applications. The formation of self-assembled multilayered film on Nafion was characterized by UV-vis spectroscopy and it was found that the polyelectrolyte layers growth on the Nafion surface regularly. Furthermore, the proton conductivity and methanol cross-over measurements were carried out for characterization of the LbL self-assembled composite membranes. The results showed that the concentration and pH of the polyelectrolytes significantly affect the proton conductivity and methanol barrier properties of the composite membranes. 10(-1) monomol polyelectrolyte concentration and pH 1.8 was found to be optimum deposition conditions considering proton conductivity and methanol permeation properties of the LbL self-assembled composite membranes. The methanol permeability of the 10 bilayers of PAH1.8/PSS1.8 deposited LbL self-assembly composite membrane was significantly suppressed and found to be 4.41 X 10(-7) cm(2)/s while the proton conductivity value is in acceptable range for fuel cell applications. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：643 / 649

页数：7

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