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Performance and stability analysis of SOFC containing thin and dense gadolinium-doped ceria interlayer sintered at low temperature

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Journal of Materiomics 2022年第2期8卷 347-357页

作者： Yige Wang Chuan Jia Zewei Lyu Minfang Han Junwei Wu Zaihong Sun Fumitada Iguchi Keiji Yashiro Tatsuya Kawada Department of Energy and Power Engineering Tsinghua UniversityBeijing100084China Department of Materials Science and Engineering Harbin Institute of Technology(Shenzhen)Shenzhen518055China Suzhou Huatsing Jingkun New Energy Technology Co.Ltd Jiangsu215314China Tohoku University Sendai 980-8579Japan

gadolinium-doped ceria(GDC)interlayers are required to prevent the interfacial reaction between La_(0.6)Sr_(0.4)Co_(0.2)Fe_(0.8)O_(3)(LSCF)cathode and Y_(2)O_(3)-stabilized ZrO 2(YSZ)electrolyte in solid oxide fuel cells(SOFCs).However,it's difficult to prepare a thin and dense GDC interlayer on the sintered half-cell at a low *** this study,the physical vapor deposition(PVD)method was employed to success-fully manufacture dense GDC interlayers with the thickness of 1 m *** influences of GDC sintering temperature(900℃,1000℃ and 1100℃)on cell performance characteristics and degradation behavior were *** cell with GDC interlayer sintered at 1100?C showed the lowest degradation rate during the 216-h *** best stability was attributed to the most effective inhibition of Sr diffusion by the GDC interlayer,which was demonstrated by the almost unchanged Ohmic and polari-zation resistances during the aging stage and the negligible Sr enrichment at YSZ/GDC *** to the conventional screen-printed GDC interlayers(sintered above 1250℃),the GDC inter-layer prepared by the PVD method and sintered at 1100℃ was significantly denser and thinner,showing a promising application prospect due to its benefits for cell stability.

关键词： Solid oxide fuel cell gadolinium-doped ceria Interlayer Sr diffusion Stability analysis

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