Electrochemical Impedance Spectroscopy of Proton Exchange Membrane Fuel Cells (PEMFC) using Embedded Probes

被引：0
|
作者：
Abbaraju, Ravikanth R. [1 ]
Dasgupta, Niladri [1 ]
Virkar, Anil V. [1 ]
机构：
[1] Univ Utah, Dept Mat Sci & Engn, Salt Lake City, UT 84112 USA
来源：
PROTON EXCHANGE MEMBRANE FUEL CELLS 9 | 2009年 / 25卷 / 01期
关键词：
REFERENCE ELECTRODE; SOLID-ELECTROLYTE; HYDROGEN;
D O I：
10.1149/1.3210650
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Three cast Nafion membranes were laminated with two silver mesh (screens) to form proton exchange membrane fuel cells (PEMFC) with embedded reference electrodes. Performance characteristics of the PEMFC were evaluated at 80 degrees C with humidified (100% RH) H-2 and air or O-2 as fuel and oxidant respectively. Impedance spectra were obtained between the cathode and the anode, between the reference electrodes and the cathode, between the reference electrodes and the anode, and across the reference electrodes under various loads. DC voltage between the reference electrodes and the cathode and the anode were also measured at various loads. Individual electrode polarizations were obtained from impedance spectra. The results showed that cathode polarization was greater than anode polarization. Also, the cathode exhibited significant concentration polarization.
引用
收藏
页码：961 / 970
页数：10
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