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タイトル: | Origins of structural and electrochemical influence on Y-doped BaZrO[3] heat-treated with NiO additive |
著者: | Han, Donglin https://orcid.org/0000-0003-1692-8850 (unconfirmed) Shinoda, Kozo Tsukimoto, Susumu Takeuchi, Hisao Hiraiwa, Chihiro Majima, Masatoshi Uda, Tetsuya |
著者名の別形: | 韓, 東麟 |
発行日: | 29-May-2014 |
出版者: | Royal Society of Chemistry |
誌名: | Journal of Materials Chemistry A |
巻: | 2 |
号: | 31 |
開始ページ: | 12552 |
終了ページ: | 12560 |
抄録: | Nickel (Ni) is expected to be an attractive anode material for protonic ceramic fuel cells using Y-doped BaZrO_3 (BZY) as an electrolyte, since Ni shows good catalytic properties for the anode reaction, and NiO is a sintering aid for BZY. In this work, a systematic investigation has been performed to reveal the influence of Ni incorporation on structural and electrochemical properties of BZY. Then, some new knowledge was obtained; the important point is that Ni cations occupy the interstitial position of (1/2, 0, 0) in the lattice of BZY, with a greatly Ba-deficient environment. As a result, Ba cations were possibly driven to the grain boundary and induced the formation of a liquid phase, which promoted the sintering process. However, the occupation of Ni on this (1/2, 0, 0) position also resulted in a negative influence on conductivity. A careful processing is required to apply Ni as the electrode in BZY based fuel cells. |
著作権等: | © The Royal Society of Chemistry 2014. This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 |
URI: | http://hdl.handle.net/2433/198561 |
DOI(出版社版): | 10.1039/C4TA01689K |
出現コレクション: | 学術雑誌掲載論文等 |
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