In situ diagnostic of liquid water distribution in cathode catalyst layer in an operating PEMFC by high-resolution soft X-ray radiography

被引：39

作者：

Deevanhxay, Phengxay ^{[1
]}

Sasabe, Takashi ^{[1
]}

Tsushima, Shohji ^{[1
]}

Hirai, Shuichiro ^{[1
]}

机构：

[1] Tokyo Inst Technol, Dept Mech & Control Engn, Meguro Ku, Tokyo 1528552, Japan

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2012年 / 22卷

关键词：

PEMFC; Soft X-ray radiography; In situ diagnostic; Liquid water transport; Cathode catalyst layer; Charge-transfer; ELECTROLYTE FUEL-CELLS; GAS-DIFFUSION; MEMBRANE; HYDROPHOBICITY; VISUALIZATION; MANAGEMENT; TRANSPORT; BEHAVIOR;

D O I：

10.1016/j.elecom.2012.05.028

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

070208 [无线电物理];

摘要：

To investigate the water transport behavior in the cathode catalyst layer (CCL) of an operating proton exchange membrane fuel cell (PEMFC), we examined transversal liquid water distributions in the CCL by using high-resolution soft X-ray radiography. The liquid water concentration gradient across the CCL was observed at a spatial resolution of 1.5 mu m. More liquid water accumulated in the CCL at the gas diffusion layer side than at the polymer electrolyte membrane side. The effect of accumulated liquid water in the CCL on the charge-transfer resistance was confirmed by electrochemical impedance spectroscopy. Liquid water accumulation in the CCL corresponds to deterioration of charge-transfer in the electrode. (C) 2012 Elsevier B.V. All rights reserved.

引用

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页码：33 / 36

页数：4

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