Influence of crystal structure on the electrochemical performance of A-site-deficient Sr1-sNb0.1Co0.9O3-δperovskite cathodes

Yinlong Zhu; Ye Lin; Xuan Shen; Jaka Sunarso; Wei Zhou; Shanshan Jiang; Dong Su; Fanglin Chen; Zongping Shao

doi:10.1039/c4ra06191h

Influence of crystal structure on the electrochemical performance of A-site-deficient Sr_1-sNb_0.1Co_0.9O_3-δperovskite cathodes

Yinlong Zhu, Ye Lin, Xuan Shen, Jaka Sunarso, Wei Zhou, Shanshan Jiang, Dong Su, Fanglin Chen, Zongping Shao

College of Chemical Engineering

Research output: Contribution to journal › Article › peer-review

42 Scopus citations

Abstract

The creation of A-site cation defects within a perovskite oxide can substantially alter the structure and properties of its stoichiometric analogue. In this work, we demonstrate that by vacating 2 and 5% of A-site cations from SrNb_0.1Co_0.9O_3-δ(SNC1.00) perovskites (Sr_1-sNb_0.1Co_0.9O_3-δ, s = 0.02 and 0.05; denoted as SNC0.98 and SNC0.95, respectively), a Jahn-Teller (JT) distortion with varying extents takes place, leading to the formation of a modified crystal lattice within a the perovskite framework. Electrical conductivity, electrochemical performance, chemical compatibility and microstructure of Sr_1-sNb_0.1Co_0.9O_3-δas cathodes for solid oxide fuel cells were evaluated. Among SNC1.00, SNC0.98 and SNC0.95, SNC0.95 (P4/mmm symmetry (#123)) which exhibits a large JT distortion in conjunction with charge-ordering of cobalt (Co) shows the best oxygen reduction reaction (ORR) activity at low temperature while SNC0.98 (P4mm symmetry (#99)), which displays a local JT distortion, shows the poorest performance.

Original language	English
Pages (from-to)	40865-40872
Number of pages	8
Journal	RSC Advances
Volume	4
Issue number	77
DOIs	https://doi.org/10.1039/c4ra06191h
State	Published - 2014

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title = "Influence of crystal structure on the electrochemical performance of A-site-deficient Sr1-sNb0.1Co0.9O3-δperovskite cathodes",

abstract = "The creation of A-site cation defects within a perovskite oxide can substantially alter the structure and properties of its stoichiometric analogue. In this work, we demonstrate that by vacating 2 and 5% of A-site cations from SrNb0.1Co0.9O3-δ(SNC1.00) perovskites (Sr1-sNb0.1Co0.9O3-δ, s = 0.02 and 0.05; denoted as SNC0.98 and SNC0.95, respectively), a Jahn-Teller (JT) distortion with varying extents takes place, leading to the formation of a modified crystal lattice within a the perovskite framework. Electrical conductivity, electrochemical performance, chemical compatibility and microstructure of Sr1-sNb0.1Co0.9O3-δas cathodes for solid oxide fuel cells were evaluated. Among SNC1.00, SNC0.98 and SNC0.95, SNC0.95 (P4/mmm symmetry (#123)) which exhibits a large JT distortion in conjunction with charge-ordering of cobalt (Co) shows the best oxygen reduction reaction (ORR) activity at low temperature while SNC0.98 (P4mm symmetry (#99)), which displays a local JT distortion, shows the poorest performance.",

author = "Yinlong Zhu and Ye Lin and Xuan Shen and Jaka Sunarso and Wei Zhou and Shanshan Jiang and Dong Su and Fanglin Chen and Zongping Shao",

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doi = "10.1039/c4ra06191h",

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T1 - Influence of crystal structure on the electrochemical performance of A-site-deficient Sr1-sNb0.1Co0.9O3-δperovskite cathodes

AU - Zhu, Yinlong

AU - Lin, Ye

AU - Shen, Xuan

AU - Sunarso, Jaka

AU - Zhou, Wei

AU - Jiang, Shanshan

AU - Su, Dong

AU - Chen, Fanglin

AU - Shao, Zongping

PY - 2014

Y1 - 2014

N2 - The creation of A-site cation defects within a perovskite oxide can substantially alter the structure and properties of its stoichiometric analogue. In this work, we demonstrate that by vacating 2 and 5% of A-site cations from SrNb0.1Co0.9O3-δ(SNC1.00) perovskites (Sr1-sNb0.1Co0.9O3-δ, s = 0.02 and 0.05; denoted as SNC0.98 and SNC0.95, respectively), a Jahn-Teller (JT) distortion with varying extents takes place, leading to the formation of a modified crystal lattice within a the perovskite framework. Electrical conductivity, electrochemical performance, chemical compatibility and microstructure of Sr1-sNb0.1Co0.9O3-δas cathodes for solid oxide fuel cells were evaluated. Among SNC1.00, SNC0.98 and SNC0.95, SNC0.95 (P4/mmm symmetry (#123)) which exhibits a large JT distortion in conjunction with charge-ordering of cobalt (Co) shows the best oxygen reduction reaction (ORR) activity at low temperature while SNC0.98 (P4mm symmetry (#99)), which displays a local JT distortion, shows the poorest performance.

AB - The creation of A-site cation defects within a perovskite oxide can substantially alter the structure and properties of its stoichiometric analogue. In this work, we demonstrate that by vacating 2 and 5% of A-site cations from SrNb0.1Co0.9O3-δ(SNC1.00) perovskites (Sr1-sNb0.1Co0.9O3-δ, s = 0.02 and 0.05; denoted as SNC0.98 and SNC0.95, respectively), a Jahn-Teller (JT) distortion with varying extents takes place, leading to the formation of a modified crystal lattice within a the perovskite framework. Electrical conductivity, electrochemical performance, chemical compatibility and microstructure of Sr1-sNb0.1Co0.9O3-δas cathodes for solid oxide fuel cells were evaluated. Among SNC1.00, SNC0.98 and SNC0.95, SNC0.95 (P4/mmm symmetry (#123)) which exhibits a large JT distortion in conjunction with charge-ordering of cobalt (Co) shows the best oxygen reduction reaction (ORR) activity at low temperature while SNC0.98 (P4mm symmetry (#99)), which displays a local JT distortion, shows the poorest performance.

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Influence of crystal structure on the electrochemical performance of A-site-deficient Sr_1-sNb_0.1Co_0.9O_3-δperovskite cathodes

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