Proton-conducting Ba1-xKxCe0.6Zr 0.2Y0.2O3-δ oxides synthesized by sol-gel combined with composition-exchange method

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Title:	Proton-conducting Ba1-xKxCe0.6Zr 0.2Y0.2O3-δ oxides synthesized by sol-gel combined with composition-exchange method
Authors:	曾重仁;Lee, Kan-Rong;Chiang, Yen-Chun;Hung, I-Ming;Tseng, Chung-Jen;Chang, Jeng-Kuei;Lee, Sheng-Wei
Contributors:	工學院能源工程研究所
Keywords:	Ba1−xKxCe0.6Zr0.2Y0.2O3−δ;C. Ionic conductivity;Chemical stability;Proton-conducting electrolyte;Solid oxide fuel cells
Date:	2014-01-01
Issue Date:	2026-04-23 12:02:31 (UTC+8)
Publisher:	Elsevier Ltd.;Elsevier Ltd
Abstract:	摘要： This study reports the synthesis of proton-conducting Ba1−xKxCe0.6Zr0.2Y0.2O3−δ (x=0.025–0.075) ceramics by using a combination of citrate–EDTA complexing sol–gel process and the composition-exchange method. Compared to the sintered oxides of similar composition prepared from conventional sol–gel powders, Ba1−xKxCe0.6Zr0.2Y0.2O3−δ oxides synthesized by sol–gel combined with the composition-exchange method are found to exhibit improved sinterability, higher conductivity, more homogeneous phase, and excellent chemical stability against CO2. Among all sintered oxides in this study, the Ba0.925K0.075Ce0.6Zr0.2Y0.2O3−δ pellet fabricated by this new method has the highest conductivity, 0.0094S/cm at 800°C, which is higher than those pressed from conventional sol–gel powders in the K doping range of 0–15%. Based on the experimental results, we discuss the mechanism for improvement in these properties in terms of calcined particle characteristics. This work demonstrates that Ba1−xKxCe0.6Zr0.2Y0.2O3−δ oxides synthesized by sol–gel combined with the composition-exchange method would be a promising electrolyte for H+-SOFC applications. More importantly, this new fabrication approach may be applied to other similar material systems, such as Sr-doped Ba(Ce,Zr)O3 ceramics. 出版者： Elsevier Ltd 出版日期： 2014-01 出處： Ceramics international, 2014-01, Vol.40 (1), p.1865-1872 版權： 2013 Elsevier Ltd and Techna Group S.r.l. 識別號： ISSN: 0272-8842 識別號： EISSN: 1873-3956 識別號： DOI: 10.1016/j.ceramint.2013.07.089
Appears in Collections:	[Energy of Mechatronics] journal & Dissertation

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