A reverse-current decay mechanism for fuel cells

被引：815

作者：

Reiser, CA ^{[1
]}

Bregoli, L ^{[1
]}

Patterson, TW ^{[1
]}

Yi, JS ^{[1
]}

Yang, JDL ^{[1
]}

Perry, ML ^{[1
]}

Jarvi, TD ^{[1
]}

机构：

[1] UTC Fuel Cells, S Windsor, CT 06074 USA

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2005年 / 8卷 / 06期

关键词：

D O I：

10.1149/1.1896466

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A mechanism that may cause accelerated performance decay of fuel cells is presented. The mechanism is explained using a one-dimensional model of the potential profile. The analysis indicates that the electrolyte potential drops from 0 to -0.59 V (vs. RHE) when the anode is partially exposed to hydrogen and partially exposed to oxygen. This causes flow of current opposite to normal fuel cell mode at the oxygen-exposed region and raises the cathode interfacial potential difference to 1.44 V, causing carbon corrosion, which decreases performance. The decay mechanism was validated using two different experimental setups which reproduced the carbon-corrosion phenomenon. (c) 2005 The Electrochemical Society.

引用

页码：A273 / A276

页数：4

共 8 条

[1]

CONDIT DA, 2003, Patent No. 66635370

[2] Kinetic model of platinum dissolution in PEMFCs [J].

Darling, RM ;

Meyers, JP .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2003, 150 (11) :A1523-A1527

[3]

Dine LLV, 2003, Procedure for shutting down a fuel cell system having an anode exhuast recycle loop, Patent No. [US6514635B2, 6514635]

[4] POTENTIAL CYCLING EFFECTS ON PLATINUM ELECTROCATALYST SURFACES [J].

KINOSHITA, K ;

LUNDQUIST, JT ;

STONEHART, P .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1973, 48 (02) :157-166

[5]

KINOSHITA K, 1988, CARBON ELECTROCHEMIC, P316

[6]

PATTERSON T, 2002, FUEL CELL TECHNOLOGY, P313

[7]

Reiser C., 2002, Patent No. [US2002/ 0076582 A1, 20020076582]

[8] Electrocatalytic corrosion of carbon support in PEMFC cathodes [J].

Roen, LM ;

Paik, CH ;

Jarvic, TD .

ELECTROCHEMICAL AND SOLID STATE LETTERS, 2004, 7 (01) :A19-A22

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