A comparative study of the electro-osmotic behavior of cation and anion exchange membranes in alcohol-water media

被引：19
|
作者：
Garcia-Nieto, David [1 ]
Maria Barragan, V. [1 ]
机构：
[1] Univ Complutense Madrid, Fac Phys, Dept Appl Phys 1, E-28040 Madrid, Spain
来源：
ELECTROCHIMICA ACTA | 2015年 / 154卷
关键词：
Electro-osmosis; Methanol; Ethanol; Ion exchange membrane; Limiting current density; METHANOL FUEL-CELL; CONDUCTING MEMBRANES; TRANSPORT-PROPERTIES; PROTON; MODEL; DRAG; PERMEABILITY; EFFICIENCY; NAFION(R); STATE;
D O I：
10.1016/j.electacta.2014.12.070
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Fuel flow coupled to the migration of ions is an important aspect of direct alcohol fuel cells, since it strongly affects the fuel cell performance. Solvent uptake and electro-osmotic transport in alcohol-water media have been investigated for different ion selective membranes. Cation and anion exchange membranes, and methanol and ethanol were used to assess the influence of the ion nature of the membrane and the type of alcohol. Current-voltage curves were also measured to determine the values of the limiting current density of each membrane system and analyze the influence of the concentration polarization effects on the measure of the electro-osmotic flow. The obtained results indicated that both the ionic nature and the type of alcohol affect the electro-osmotic transport. The membrane system with the anion exchange membrane and methanol-water solvent presented the lowest electro-osmotic permeability and a lower influence of the concentration polarization effects. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：166 / 176
页数：11
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