Development of MnCoO Coating with New Aluminizing Process for Planar SOFC Stacks
Low-cost, chromia-forming steels find widespread use in SOFCs at operating temperatures below 800°C, because of their low thermal expansion mismatch and low cost. However, volatile Cr-containing species originating from this scale poison the cathode material in the cells and subsequently cause power degradation in the devices. To prevent this, a conductive manganese cobaltite coating has been developed. However, this coating is not compatible with forming hermetic seals between the interconnect or window frame component and ceramic cell. This coating reacts with sealing materials. Thus, a new aluminizing process has been developed for the sealing regions in these parts, as well as for other metallic stack and balance-of-plant components. From this development, the sealing performance and SOFC stack performance became very stable.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 1009710
- Report Number(s):
- PNNL-SA-67464; IJHEDX; AA2530000; TRN: US201107%%824
- Journal Information:
- International Journal of Hydrogen Energy, 36(7):4549-4556, Vol. 36, Issue 7; ISSN 0360-3199
- Country of Publication:
- United States
- Language:
- English
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