(Invited) understanding and controlling chemo-mechanical coupling in perovskite oxides

N. H. Perry, D. Marrocchelli, S. R. Bishop, H. L. Tuller

研究成果: 著書/レポートタイプへの貢献会議での発言

3 引用 (Scopus)

抜粋

Mixed ionic and electronic conducting perovskites that can readily exchange oxygen with the atmosphere exhibit a chemo-mechanical coupling between their oxygen content and their lattice dimensions. The lattice dilation accompanying oxygen loss, termed "chemical expansion," causes large chemical stresses in devices during operation that can lead to mechanical failure. This paper describes our work aimed at understanding, across multiple length scales, which factors impact chemical expansion coefficients in perovskites. Polycrystalline gallate and titanate perovskites containing multivalent Ni, Fe, and Co have been studied using in situ thermogravimetry, dilatometry, and diffraction to probe the chemical expansion process at macroscopic and crystal structure levels. Density functional theory, molecular dynamics, and empirical simulations have provided atomistic insight into changes taking place on the anion and cation sublattices during oxygen loss. Factors impacting the magnitude of the chemo-mechanical coupling, including oxygen vacancy radii, charge localization on cations, temperature, and crystal symmetry have been identified.

元の言語英語
ホスト出版物のタイトルMechano-Electro-Chemical Coupling in Energy Related Materials and Devices 2
編集者S. R. Bishop, P. Mukherjee, J. Rupp, Y.-T. Cheng
出版者Electrochemical Society Inc.
ページ1-8
ページ数8
エディション24
ISBN(電子版)9781607685395
DOI
出版物ステータス出版済み - 1 1 2016
イベントSymposium on Mechano-Electro-Chemical Coupling in Energy Related Materials and Devices 2 - 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24
72
ISSN(印刷物)1938-5862
ISSN(電子版)1938-6737

その他

その他Symposium on Mechano-Electro-Chemical Coupling in Energy Related Materials and Devices 2 - 229th ECS Meeting
米国
San Diego
期間5/29/166/2/16

    フィンガープリント

All Science Journal Classification (ASJC) codes

  • Engineering(all)

これを引用

Perry, N. H., Marrocchelli, D., Bishop, S. R., & Tuller, H. L. (2016). (Invited) understanding and controlling chemo-mechanical coupling in perovskite oxides. : S. R. Bishop, P. Mukherjee, J. Rupp, & Y-T. Cheng (版), Mechano-Electro-Chemical Coupling in Energy Related Materials and Devices 2 (24 版, pp. 1-8). (ECS Transactions; 巻数 72, 番号 24). Electrochemical Society Inc.. https://doi.org/10.1149/07224.0001ecst