Enhanced power density of metal-supported solid oxide fuel cell with a two-step firing process
SCIE
SCOPUS
- Title
- Enhanced power density of metal-supported solid oxide fuel cell with a two-step firing process
- Authors
- Cho, HJ; Park, YM; Choi, GM
- Date Issued
- 2011-06-16
- Publisher
- ELSEVIER SCIENCE BV
- Abstract
- In order to solve the Ni-coarsening problem during fabrication, Ni-supported solid oxide fuel cells (SOFCs) were fabricated using a two step process; co-sintering the cell at a high temperature in air and reducing it at a low temperature. NiO, NiO-YSZ, and YSZ (yttria-stabilized zirconia) were tape casted and the laminated cell was co-fired at 1300 degrees C in air to form a three-layered half cell and then reduced at 800 degrees C in H(2) in order to convert the NiO to the Ni support. Thin and strong Ni-supported SOFC was successfully fabricated by the two-step process without visible cracks. The anodic microstructure was compared with that sintered at 1350 degrees C in H(2). The particle size of Ni in anode, reduced at 800 degrees C, was much smaller (< 1 mu m) and more uniform than that of Ni sintered at 1350 degrees C in H(2) (similar to 5 mu m). The cell with the two-step fired anode showed a power density as high as similar to 0.93 W/cm(2) when it was measured at 800 degrees C using LSCF as cathodes. This was about twice higher than that of the cell co-fired at 1350 degrees C in H(2) and thus the highest value among many metal-supported cells based on a YSZ electrolyte. Thus, the anode microstructure is critical in the performance of metal-supported SOFC. (C) 2010 Elsevier B.V. All rights reserved.
- Keywords
- SOFC; Metal support; Ni; Anode; Microstructure; Two-step sintering; SOFC INTERCONNECT; PERFORMANCE; FABRICATION
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/17191
- DOI
- 10.1016/J.SSI.2010.03.023
- ISSN
- 0167-2738
- Article Type
- Article
- Citation
- SOLID STATE IONICS, vol. 192, no. 1, page. 519 - 522, 2011-06-16
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