Effect of solvents on the characteristics of Nafion®/PTFE composite membranes for fuel cell applications

被引：50
|
作者：
Ramya, K. [1 ]
Velayutham, G. [1 ]
Subramaniam, C. K. [1 ]
Rajalakshmi, N. [1 ]
Dhathathreyan, K. S. [1 ]
机构：
[1] Ctr Fuel Cell Technol, Madras 601302, Tamil Nadu, India
来源：
JOURNAL OF POWER SOURCES | 2006年 / 160卷 / 01期
关键词：
composite membranes; porous PTFE; fuel cells; Nafion (R);
D O I：
10.1016/j.jpowsour.2005.12.082
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：
Composite membranes were prepared by impregnation of porous PTFE membrane with 2.5% Nafion (R) solution prepared in various solvents. The solvents chosen were based on their solubility parameters to effectively wet the substrate for obtaining membranes with lower resistances. Earlier studies on composite membrane preparation did not take the solubility parameter of the solvent to wet the substrate into account. Membrane conductivity was dependent on the solvent type and its solubility parameter. Solvents with solubility parameter close to Nafion (R) backbone/PTFE showed lower charge transfer resistance and the solvents with solubility parameter close to ionic groups showed higher conductivity. The effect of other parameters like compaction pressure, humidity and incorporation of Pt particles on the membrane resistance have also been investigated. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：10 / 17
页数：8
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