Development of solid-oxide fuel cells that operate at 500 C

Journal Article · Thu Apr 01 04:00:00 EST 1999 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1.1391758· OSTI ID:345312

Doshi, R; Carter, J D; Wang, X; Krumpelt, M ^[1]; Richards, V L ^[2]

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1. Argonne National Lab., IL (United States). Electrochemical Technology Program
2. Tri-State Univ., Angola, IN (United States). Dept. of Mechanical and Aerospace Engineering

Solid-oxide fuel cells based on doped ceria electrolytes and operating at 500 C are shown to be feasible. The operating regime of doped ceria electrolytes is discussed. It is shown that the ionic conductivity of ceria-based fuel cells is sufficiently high for operation with hydrogen fuel at low temperatures. The major challenges of fabricating a thin electrolyte by a conventional method and the development of high-performance cathodes capable of operating at 500--600 C are addressed. Cells based on thin-film ceria electrolytes also exhibited good open-circuit voltages between 0.97 and 1 V. Cathode materials with high performance have been developed from pyrochlores, perovskites, and cermets of silver and doped bismuth oxide. The advantages and disadvantages of different cathode materials are discussed. The maximum power density obtained at 500 C was 140 mW/cm{sup 2}.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 345312
• Journal Information: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 4 Vol. 146; ISSN 0013-4651; ISSN JESOAN
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
CATHODES
CERIUM OXIDES
FABRICATION
HYDROGEN FUEL CELLS
IONIC CONDUCTIVITY
PERFORMANCE
SOLID ELECTROLYTE FUEL CELLS
SOLID ELECTROLYTES