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

Nicola Helen Perry, D. Marrocchelli, S. R. Bishop, H. L. Tuller

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationMechano-Electro-Chemical Coupling in Energy Related Materials and Devices 2
EditorsS. R. Bishop, P. Mukherjee, J. Rupp, Y.-T. Cheng
PublisherElectrochemical Society Inc.
Pages1-8
Number of pages8
Edition24
ISBN (Electronic)9781607685395
DOIs
Publication statusPublished - Jan 1 2016
EventSymposium on Mechano-Electro-Chemical Coupling in Energy Related Materials and Devices 2 - 229th ECS Meeting - San Diego, United States
Duration: May 29 2016Jun 2 2016

Publication series

NameECS Transactions
Number24
Volume72
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

OtherSymposium on Mechano-Electro-Chemical Coupling in Energy Related Materials and Devices 2 - 229th ECS Meeting
CountryUnited States
CitySan Diego
Period5/29/166/2/16

Fingerprint

Perovskite
Oxides
Oxygen
Positive ions
Crystal symmetry
Oxygen vacancies
Density functional theory
Thermogravimetric analysis
Molecular dynamics
Negative ions
Diffraction
Crystal structure
Temperature

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Perry, N. H., Marrocchelli, D., Bishop, S. R., & Tuller, H. L. (2016). (Invited) understanding and controlling chemo-mechanical coupling in perovskite oxides. In S. R. Bishop, P. Mukherjee, J. Rupp, & Y-T. Cheng (Eds.), Mechano-Electro-Chemical Coupling in Energy Related Materials and Devices 2 (24 ed., pp. 1-8). (ECS Transactions; Vol. 72, No. 24). Electrochemical Society Inc.. https://doi.org/10.1149/07224.0001ecst

(Invited) understanding and controlling chemo-mechanical coupling in perovskite oxides. / Perry, Nicola Helen; Marrocchelli, D.; Bishop, S. R.; Tuller, H. L.

Mechano-Electro-Chemical Coupling in Energy Related Materials and Devices 2. ed. / S. R. Bishop; P. Mukherjee; J. Rupp; Y.-T. Cheng. 24. ed. Electrochemical Society Inc., 2016. p. 1-8 (ECS Transactions; Vol. 72, No. 24).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Perry, NH, Marrocchelli, D, Bishop, SR & Tuller, HL 2016, (Invited) understanding and controlling chemo-mechanical coupling in perovskite oxides. in SR Bishop, P Mukherjee, J Rupp & Y-T Cheng (eds), Mechano-Electro-Chemical Coupling in Energy Related Materials and Devices 2. 24 edn, ECS Transactions, no. 24, vol. 72, Electrochemical Society Inc., pp. 1-8, Symposium on Mechano-Electro-Chemical Coupling in Energy Related Materials and Devices 2 - 229th ECS Meeting, San Diego, United States, 5/29/16. https://doi.org/10.1149/07224.0001ecst
Perry NH, Marrocchelli D, Bishop SR, Tuller HL. (Invited) understanding and controlling chemo-mechanical coupling in perovskite oxides. In Bishop SR, Mukherjee P, Rupp J, Cheng Y-T, editors, Mechano-Electro-Chemical Coupling in Energy Related Materials and Devices 2. 24 ed. Electrochemical Society Inc. 2016. p. 1-8. (ECS Transactions; 24). https://doi.org/10.1149/07224.0001ecst
Perry, Nicola Helen ; Marrocchelli, D. ; Bishop, S. R. ; Tuller, H. L. / (Invited) understanding and controlling chemo-mechanical coupling in perovskite oxides. Mechano-Electro-Chemical Coupling in Energy Related Materials and Devices 2. editor / S. R. Bishop ; P. Mukherjee ; J. Rupp ; Y.-T. Cheng. 24. ed. Electrochemical Society Inc., 2016. pp. 1-8 (ECS Transactions; 24).
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