Electrochemical Performance and Stability of the Cathode for Solid Oxide Fuel Cells II. Role of Ni diffusion on LSM performance
Journal Article
·
· Journal of the Electrochemical Society
The sintering of a standard (La0.8Sr0.2)0.98MnO3 (LSM-20) solid oxide fuel cell cathode composition (in the temperature range of 1050-1200ºC) on anode-supported cells utilizing a Ni-YSZ anode and thin YSZ electrolyte (<10 μm thickness) has revealed the need for a protective ceria interlayer to prevent a detrimental interaction between the YSZ and the LSM. The interaction, however, is not the typically assumed formation of insulating La- and/or Sr-zirconate, but rather the result of Ni diffusion from the anode through the YSZ electrolyte and into the LSM resulting in coarsening and increased densification of the LSM microstructure. As an alternative to the use of a protective ceria interlayer, the presence of YSZ in the cathode material was able to suppress coarsening of LSM, thereby significantly improving the electrochemical performance.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 979497
- Report Number(s):
- PNNL-SA-68676; 35406; AA2530000
- Journal Information:
- Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 5 Vol. 157; ISSN 0013-4651; ISSN JESOAN
- Publisher:
- The Electrochemical Society
- Country of Publication:
- United States
- Language:
- English
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