Preparation and characteristics of Ba0.5Sr0.5Co0.8Fe0.2O3-delta cathodes for IT-SOFCs by electrostatic slurry spray deposition
- Authors
- Choi, Jinyi; Im, Jongmo; Park, Inyu; Shin, Dongwook
- Issue Date
- Jan-2012
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Thermal expansion; Perovskites; SOFCs; BSCF
- Citation
- CERAMICS INTERNATIONAL, v.38, pp.S489 - S492
- Indexed
- SCIE
SCOPUS
- Journal Title
- CERAMICS INTERNATIONAL
- Volume
- 38
- Start Page
- S489
- End Page
- S492
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/166533
- DOI
- 10.1016/j.ceramint.2011.05.060
- ISSN
- 0272-8842
- Abstract
- To solve the interfacial peeling-off problem of cathode materials Ba0.5Sr0.5Co0.8Fe0.2O3-delta (BSCF), electrostatic slurry spray deposition (ESSD) was applied. The BSCF cathode was deposited on a COO pellet by ESSD and the electrochemical performance of the BSCF cathode is investigated at various temperatures (650-800 degrees C) and oxygen partial pressures (0.15-0.8 atm). Microstructural observation showed that the BSCF/CGO half cell exhibited good adhesion between cathode and electrolyte layers without any cracks for peeling-off problem. The polarization resistance was estimated to 1.78 Omega cm(2) at 650 degrees C and the average activation energy was 118.8 kJ mol(-1). The dependence of polarization resistances on Po-2 shows that the rate-determining step of the oxygen reduction reaction in the prepared BSCF cathode is the charge transfer between electrolyte and electrode.
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