Surface composition and oxygen exchange properties of alkaline earth-free perovskites; LaCo0.6Ni0.4O3

J. Druce, H. Tellez, T. Ishihara, J. A. Kilner

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

1 引用 (Scopus)

抜粋

It is well known that alkaline earth additives in conventional perovskite-based solid oxide electrode materials tend to segregate rapidly to the outer surfaces, which is associated with degradation in device performance. It may be possible to avoid these problems by developing materials which do not contain alkaline earth dopants; however, without the oxygen vacancies introduced by alkaline earth doping, the oxygen transport and electro-catalytic properties may suffer. Here, we investigate oxygen transport in the nickel doped lanthanum cobaltite system, and find that the relatively low oxygen diffusivity is dominated by grain boundary transport. Despite this, at higher temperatures, the surface exchange coefficient is comparable to state-of-the-art Sr doped cobaltites. The surface composition of the annealed samples measured by Low Energy Ion Scattering spectroscopy does not appear different from the as-polished samples, suggesting that the surface composition is indeed more stable for this alkaline earth free material.

元の言語英語
ホスト出版物のタイトルIonic and Mixed Conducting Ceramics 10
編集者X. D. Zhou, M. B. Mogensen, T. M. Gur, T. Kawada, A. Manivannan
出版者Electrochemical Society Inc.
ページ71-80
ページ数10
エディション7
ISBN(電子版)9781607685395
DOI
出版物ステータス出版済み - 2016
イベントSymposium on Ionic and Mixed Conducting Ceramics 10 - 229th ECS Meeting - San Diego, 米国
継続期間: 5 29 20166 2 2016

出版物シリーズ

名前ECS Transactions
番号7
72
ISSN(印刷物)1938-6737
ISSN(電子版)1938-5862

その他

その他Symposium on Ionic and Mixed Conducting Ceramics 10 - 229th ECS Meeting
米国
San Diego
期間5/29/166/2/16

All Science Journal Classification (ASJC) codes

  • Engineering(all)

フィンガープリント Surface composition and oxygen exchange properties of alkaline earth-free perovskites; LaCo<sub>0.6</sub>Ni<sub>0.4</sub>O<sub>3</sub>' の研究トピックを掘り下げます。これらはともに一意のフィンガープリントを構成します。

  • これを引用

    Druce, J., Tellez, H., Ishihara, T., & Kilner, J. A. (2016). Surface composition and oxygen exchange properties of alkaline earth-free perovskites; LaCo0.6Ni0.4O3 : X. D. Zhou, M. B. Mogensen, T. M. Gur, T. Kawada, & A. Manivannan (版), Ionic and Mixed Conducting Ceramics 10 (7 版, pp. 71-80). (ECS Transactions; 巻数 72, 番号 7). Electrochemical Society Inc.. https://doi.org/10.1149/07207.0071ecst