Lee, Sung-Il Park, Mansoo Hong, Jongsup Kim, Hyoungchul Son, Ji-Won Lee, Jong-Ho Kim, Byung-Kook Lee, Hae-Weon Yoon, Kyung Joong 2024-01-20T01:01:19Z 2024-01-20T01:01:19Z 2021-09-05 2017-08 0955-2219 https://pubs.kist.re.kr/handle/201004/122452 To enable the development of next-generation solid oxide fuel cells (SOFCs), the fabrication of dense and defect-free diffusion barrier layers via constrained sintering has been a significant challenge. Here, we present a double layer technique that enables complete densification of a defect-free gadolinia-doped ceria diffusion barrier layer. In this approach, top and bottom layers were individually designed to perform unique functions based on systematic analysis of constrained sintering. The top layer, which contains 1 wt% CuO as a sintering aid, provides sufficient sintering driving force via liquid-phase sintering to allow complete densification of the film, while the bottom layer without a sintering aid prevents detrimental chemical reactions and regulates the global sintering rate to eliminate macro-defects. Such fabrication of dense diffusion barrier layers via a standard ceramic processing route would allow the use of novel cathode materials in practical SOFC manufacturing. Furthermore, the strategy presented in this study could be exploited in various multi-layer ceramic applications involving constrained sintering. (C) 2017 Elsevier Ltd. All rights reserved. English ELSEVIER SCI LTD GADOLINIA-DOPED CERIA THIN-FILMS IT-SOFC TEMPERATURE ELECTROLYTES PERFORMANCE DEPOSITION SUBSTRATE Fabrication of dense and defect-free diffusion barrier layer via constrained sintering for solid oxide fuel cells Article 10.1016/j.jeurceramsoc.2017.03.041 1 JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, v.37, no.9, pp.3219 - 3223 JOURNAL OF THE EUROPEAN CERAMIC SOCIETY 37 9 3219 3223 scie scopus 000401596300025 2-s2.0-85016468680 Materials Science, Ceramics Materials Science Article GADOLINIA-DOPED CERIA THIN-FILMS IT-SOFC TEMPERATURE ELECTROLYTES PERFORMANCE DEPOSITION SUBSTRATE Gadolinia-doped ceria Diffusion barrier layer Constrained sintering Sintering aid Solid oxide fuel cell