Development of solid-oxide fuel cells that operate at 500{degree}C.
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/cm2.
- Research Organization:
- Argonne National Laboratory (ANL)
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 938325
- Report Number(s):
- ANL/CMT/JA-29346
- Journal Information:
- J. Electrochem. Soc., Journal Name: J. Electrochem. Soc. Journal Issue: 4 ; 1999 Vol. 146; ISSN JESOAN; ISSN 0013-4651
- Country of Publication:
- United States
- Language:
- ENGLISH
Similar Records
Development of solid-oxide fuel cells that operate at 500 C
Cathodes for ceria-based fuel cells
Journal Article
·
Wed Mar 31 23:00:00 EST 1999
· Journal of the Electrochemical Society
·
OSTI ID:345312
Cathodes for ceria-based fuel cells
Conference
·
Fri Aug 01 00:00:00 EDT 1997
·
OSTI ID:508164