Long-term cell degradation mechanism in high-temperature proton exchange membrane fuel cells

被引：109

作者：

Oono, Yuka ^{[1
]}

Sounai, Atsuo ^{[2
]}

Hori, Michio ^{[1
]}

机构：

[1] Daido Univ, Fuel Cell Res Ctr, Minami Ku, Nagoya, Aichi 4578530, Japan

[2] Suzuka Natl Coll Technol, Dept Mat Sci & Engn, Suzuka, Mie 5100294, Japan

来源：

JOURNAL OF POWER SOURCES | 2012年 / 210卷

关键词：

High-temperature proton exchange membrane fuel cells; Performance; Durability; Polybenzimidazole; Phosphoric acid; Mechanism; PHOSPHORIC-ACID; POLYBENZIMIDAZOLE-MEMBRANE; DOPED POLYBENZIMIDAZOLE; CARBON-MONOXIDE; PERFORMANCE; CATALYST; PEMFCS; NMR; PBI;

D O I：

10.1016/j.jpowsour.2012.02.098

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 mechanism underlying the decline in cell voltage over time was investigated for high-temperature proton exchange membrane fuel cells. Five identical cells were prepared and long-term powergeneration tests were conducted at an operation temperature of 150 degrees C and a current density of 0.2 A cm(-2) for periods of up to 17,860 h. Each of the cells was then analyzed using transmission electron microscopy and electron probe micro-analysis (EPMA). The results indicated that growth of the Pt catalyst particles occurred during operation, in addition to oxidation of the carbon support. Degradation of the catalyst layers was investigated by EPMA of cross sections of the membrane electrode assemblies, allowing the mechanism of cell performance reduction to be clarified. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：366 / 373

页数：8

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