Crystal Structure and Transport Properties of Oxygen-Deficient Perovskite Sr0.9Y0.1CoO3-δ

Yang, Tianrang; Mattick, Victoria F.; Chen, Yan; An, Ke; Ma, Dong; Huang, Kevin

doi:10.1021/acsaem.7b00275

Title: Crystal Structure and Transport Properties of Oxygen-Deficient Perovskite Sr_0.9Y_0.1CoO_3-δ

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Abstract

The present work reports a systematic study on temperature-dependent local crystal structure, oxygen stoichiometry, and electrical/electrochemical properties of an oxygen-deficient Sr_0.9Y_0.1CoO_3-δ (SYC10) perovskite using variable-temperature neutron diffraction (VTND), thermal gravimetric analysis, and electrical/electrochemical methods, respectively. The VTND reveals that the crystal symmetry of SYC10 remains P4/mmm tetragonal up to 900 °C. The tetragonal symmetry reflects the net effects of temperature and oxygen stoichiometry on crystal symmetry. The observed p-type electronic conductivity behavior originates from the charge-ordering between the two distinctive Co-sites. The partial oxide-ion conductivity and diffusivity obtained from oxygen permeation measurements are 2.3 × 10^–2 S cm^–1 and 7.98 × 10–8 cm²/s at 800 °C in air, respectively. The electrochemical oxygen reduction reaction kinetics of the SYC10 cathode is primarily limited by the charge-transfer process at low temperatures (600–650 °C) and oxide-ion migration from the cathode into the electrolyte at high temperatures (700–800 °C).

Authors:

Yang, Tianrang ^[1]; Mattick, Victoria F. ^[1]; Chen, Yan ^[2]; An, Ke ^[2]; Ma, Dong ^[2];

^[1]

Univ. of South Carolina, Columbia, SC (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Publication Date:: 2018-01-29

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE Advanced Research Projects Agency - Energy (ARPA-E); USDOE Office of Fossil Energy (FE)

OSTI Identifier:: 1429188

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: ACS Applied Energy Materials

Additional Journal Information:: Journal Volume: 1; Journal Issue: 2; Journal ID: ISSN 2574-0962

Publisher:: American Chemical Society (ACS)

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE

Citation Formats


                    Yang, Tianrang, Mattick, Victoria F., Chen, Yan, An, Ke, Ma, Dong, and Huang, Kevin. Crystal Structure and Transport Properties of Oxygen-Deficient Perovskite Sr0.9Y0.1CoO3-δ.  United States: N. p., 2018. 
Web.  doi:10.1021/acsaem.7b00275.

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                    Yang, Tianrang, Mattick, Victoria F., Chen, Yan, An, Ke, Ma, Dong, & Huang, Kevin. Crystal Structure and Transport Properties of Oxygen-Deficient Perovskite Sr0.9Y0.1CoO3-δ.  United States.  https://doi.org/10.1021/acsaem.7b00275

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                    Yang, Tianrang, Mattick, Victoria F., Chen, Yan, An, Ke, Ma, Dong, and Huang, Kevin. Mon .  
"Crystal Structure and Transport Properties of Oxygen-Deficient Perovskite Sr0.9Y0.1CoO3-δ".  United States.  https://doi.org/10.1021/acsaem.7b00275.  https://www.osti.gov/servlets/purl/1429188.

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@article{osti_1429188,

  title        = {Crystal Structure and Transport Properties of Oxygen-Deficient Perovskite Sr0.9Y0.1CoO3-δ},

  author       = {Yang, Tianrang and Mattick, Victoria F. and Chen, Yan and An, Ke and Ma, Dong and Huang, Kevin},

  abstractNote = {The present work reports a systematic study on temperature-dependent local crystal structure, oxygen stoichiometry, and electrical/electrochemical properties of an oxygen-deficient Sr0.9Y0.1CoO3-δ (SYC10) perovskite using variable-temperature neutron diffraction (VTND), thermal gravimetric analysis, and electrical/electrochemical methods, respectively. The VTND reveals that the crystal symmetry of SYC10 remains P4/mmm tetragonal up to 900 °C. The tetragonal symmetry reflects the net effects of temperature and oxygen stoichiometry on crystal symmetry. The observed p-type electronic conductivity behavior originates from the charge-ordering between the two distinctive Co-sites. The partial oxide-ion conductivity and diffusivity obtained from oxygen permeation measurements are 2.3 × 10–2 S cm–1 and 7.98 × 10–8 cm2/s at 800 °C in air, respectively. The electrochemical oxygen reduction reaction kinetics of the SYC10 cathode is primarily limited by the charge-transfer process at low temperatures (600–650 °C) and oxide-ion migration from the cathode into the electrolyte at high temperatures (700–800 °C).},

  doi          = {10.1021/acsaem.7b00275},

  journal      = {ACS Applied Energy Materials},

  number       = 2,

  volume       = 1,

  place        = {United States},

  year         = {2018},

  month        = {1}

}

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Title: Crystal Structure and Transport Properties of Oxygen-Deficient Perovskite Sr0.9Y0.1CoO3-δ

Abstract

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Title: Crystal Structure and Transport Properties of Oxygen-Deficient Perovskite Sr_0.9Y_0.1CoO_3-δ