Acceptor-doped ceria deposited on a porous Ni film as a possible micro-SOFC electrolyte
SCIE
SCOPUS
- Title
- Acceptor-doped ceria deposited on a porous Ni film as a possible micro-SOFC electrolyte
- Authors
- YounKi Lee; Choi, GM
- Date Issued
- 2013-10
- Publisher
- SPRINGER
- Abstract
- 3 Micro-SOFCs, miniaturized solid oxide fuel cells (SOFCs) for low temperature operation, are being developed as a power source for portable electronics. Reducing the thickness of the electrolyte and the adoption of acceptor-doped ceria as an electrolyte material are important to minimize the Ohmic resistance at low temperature. Acceptor-doped ceria thin-films are often deposited on nano-porous metal substrates to reduce cracking of the thin electrolyte. However, due to the difficulty of depositing a pore-free electrolyte on a porous medium, the cells often show the low open circuit voltages (OCVs). In this study, we have deposited similar to 1 mu m-thick Gd-doped ceria on a nano-porous nickel film to assess whether a thin-film, metal-supported GDC can be deposited as a pore-free layer and would thus be suitable as an electrolyte of micro-SOFCs. The Ni-supported GDC cell showed an OCV of similar to 0.92 V at 450 A degrees C under a hydrogen/air gradient. The high OCV verifies that the thin-electrolyte layer, deposited on porous Ni using the pulsed laser deposition (PLD) method, is dense enough to prevent gas leakage as also observed in its microstructure.
- Keywords
- Micro-solid oxide fuel cell; Acceptor-doped ceria; Open circuit voltage; Thin film; OXIDE FUEL-CELLS; OPEN-CIRCUIT VOLTAGE; THERMAL-EXPANSION; PERFORMANCE; MEMBRANES; TEMPERATURE; FABRICATION; THICKNESS; STABILITY; NICKEL
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/15009
- DOI
- 10.1007/S10832-013-9824-X
- ISSN
- 1385-3449
- Article Type
- Article
- Citation
- Journal of Electroceramics, vol. 31, no. 1-2, page. 238 - 244, 2013-10
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