On the electrochemical impedance spectroscopy of direct methanol fuel cell

被引：57

作者：

Lai, Chien-Ming ^{[1
]}

Lin, Jing-Chie ^{[1
]}

Hsueh, Kan-Lin ^{[2
]}

Hwang, Chiou-Ping ^{[2
]}

Tsay, Keh-Chyun ^{[2
]}

Tsai, Li-Duan ^{[2
]}

Peng, Yu-Min ^{[2
]}

机构：

[1] Natl Cent Univ, Dept Mech Engn, Inst Mat Sci & Engn, Jhongli 320, Taoyuan County, Taiwan

[2] Ind Technol Res Inst, Mat Res Labs, Hsinchu 310, Taiwan

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2007年 / 32卷 / 17期

关键词：

electrochemical impedance spectroscopy; direct methanol fuel cell; membrane electrode assembly; equivalent circuit elements; interfacial impedance;

D O I：

10.1016/j.ijhydene.2007.03.040

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：

The direct methanol fuel cell (DMFC) was operated under a variety of current densities to monitor the electrochemical impedance spectroscopy (EIS) for understanding its reaction mechanism. Based on the EIS analysis, the impedance of the cell reaction is divided into three components, two of them are current dependent and the remainder is current independent. Through detailed exploration of the impedance components, the high-frequency impedance was attributed to interfacial behavior, the medium-frequency impedance to electrochemical reactions, and the low-frequency impedance to the adsorption/relaxation of CO. Based on EIS analysis, a qualitative model is proposed to delineate the reaction mechanisms of DMFC, which is confirmed quantitatively by one set of equivalent circuit elements. The experimental data are satisfactorily consistent with the results simulated from the proposed model. (c) 2007 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.

引用

页码：4381 / 4388

页数：8

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