powder spraying with powder synthesized via two techniques

Shi, Huangang, Zhou, Wei, Ran, Ran and Shao, Zongping (2010) powder spraying with powder synthesized via two techniques. Journal of Power Sources, 195 2: 393-401. doi:10.1016/j.jpowsour.2009.07.056


Author Shi, Huangang
Zhou, Wei
Ran, Ran
Shao, Zongping
Title powder spraying with powder synthesized via two techniques
Journal name Journal of Power Sources   Check publisher's open access policy
ISSN 0378-7753
1873-2755
Publication date 2010-01-15
Sub-type Article (original research)
DOI 10.1016/j.jpowsour.2009.07.056
Open Access Status
Volume 195
Issue 2
Start page 393
End page 401
Total pages 9
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Language eng
Formatted abstract
Fabrication of dense Sm0.2Ce0.8O1.9 (SDC) thin-film electrolytes by wet powder spraying in combination with high-temperature sintering is investigated. Two powder synthesis techniques, i.e., a hydrothermal synthesis and an EDTA-citrate complexing sol-gel process, were investigated. X-ray diffraction, BET surface area and laser particle size analysis demonstrate there is certain level of aggregation in both powders. However, it is more pronounced in powders obtained by the complexing process, and only the colloidal suspensions of powders prepared by hydrothermal synthesis are stable. SEM analysis of the green and sintered thin-film electrolytes demonstrate that the SDC electrolyte with powders prepared via the hydrothermal synthesis is denser. By optimizing the fabrication conditions, dense SDC electrolytes with a thickness of ∼12 μm are successfully fabricated. The cells with SDC prepared from hydrothermal synthesis demonstrate open circuit voltages and power outputs similar to those of similar cells fabricated from other advanced techniques. Because of its simplicity and flexibility for anode substrate geometric shape, it turns out to be a promising technology to fabricate thin-film SDC electrolyte for solid-oxide fuel cell application.
Keyword Fabrication
Samaria-doped ceria
Solid-oxide fuel cells
Thin-film electrolyte
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ
Additional Notes Published online 8 August 2009

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Chemical Engineering Publications
 
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