Chromium Vapor Sensor for Monitoring Solid Oxide Fuel Cell Systems
One of the major degradation mechanisms in solid oxide fuel cells (SOFCs) is cathode poisoning by chromium due to vaporization from the metallic interconnect or balance-of-plant materials. Information on the chromium content in an operating fuel cell would be useful to anticipate degradation and take appropriate precautions. In this project, sensors for measuring the concentration of chromium-containing gases in a SOFC system were developed. The sensors are electrochemical sensors based on solid electrolytes with an auxiliary electrode to provide the sensitivity to chromium. Two different solid electrolyte materials were used: An oxygen ion conducting electrolyte, yttria stabilized zirconia, and a sodium ion conducting electrolyte, beta” alumina. The sensor based on beta” alumina generated a larger response to the presence of chromium. The concept of using a thin-film conducting oxide to measure the cumulative amount of chromium was also evaluated. The sensor was based on amanganese-copper oxide thin film and underwent an increase in resistance upon exposure to a chromium-containing gas.
- Research Organization:
- Auburn Univ., AL (United States)
- Sponsoring Organization:
- USDOE Office of Fossil Energy (FE); USDOE Office of International Affairs (IA), Climate Change Policy and Technology (IA-40)
- DOE Contract Number:
- FE0028183
- OSTI ID:
- 1566829
- Report Number(s):
- DOE-AUBURN-0028183-2
- Country of Publication:
- United States
- Language:
- English
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