Water uptake, ionic conductivity and swelling properties of anion-exchange membrane

被引：147

作者：

Duan, Qiongjuan ^{[1
,2
,3
]}

Ge, Shanhai ^{[1
,2
]}

Wang, Chao-Yang ^{[1
,2
]}

机构：

[1] Penn State Univ, Electrochem Engine Ctr ECEC, University Pk, PA 16802 USA

[2] Penn State Univ, Dept Mech & Nucl Engn, University Pk, PA 16802 USA

[3] Donghua Univ, Coll Mat Sci & Engn, State Key Lab Modificat Chem Fibers & Polymer Mat, Shanghai 201620, Peoples R China

来源：

JOURNAL OF POWER SOURCES | 2013年 / 243卷

关键词：

Anion-exchange membrane; Water uptake; Conductivity; Dimensional change; Excess volume of mixing; TRANSPORT-PROPERTIES; NAFION; PERFORMANCE; PERCOLATION; PROTON;

D O I：

10.1016/j.jpowsour.2013.06.095

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Water uptake, ionic conductivity and dimensional change of the anion-exchange membrane made by Tokuyama Corporation (A201 membrane) are investigated at different temperatures and water activities. Specifically, the amount of water taken up by membranes exposed to water vapor and membranes soaked in liquid water is determined. The water uptake of the A201 membrane increases with water content as well as temperature. In addition, water sorption data shows Schroeder's paradox for the AEMs investigated. The swelling properties of the A201 membrane exhibit improved dimensional stability compared with Nafion membrane. Water sorption of the A201 membrane occurs with a substantial negative excess volume of mixing. The threshold value of hydrophilic fraction in the A201 membrane for ionic conductivity is around 0.34, above which, the conductivity begins to rise quickly. This indicates that a change in the connectivity of the hydrophilic domains occurs when hydrophilic fraction approaches 0.34. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：773 / 778

页数：6

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