Oxygen diffusion and electrochemical performance of La0.6−xSr0.4BaxCo1−yFeyO3−δ

La 0.6−x Sr 0.4 Ba x Co 1−y Fe y O 3−δ (x = 0, 0.2, y = 0.1, 0.2, 0.3, 0.4) were prepared by the glycine–nitrate process. The electrochemical property and oxygen diffusion behavior of La 0.6−x Sr 0.4 Ba x Co 1−y Fe y O 3−δ were investigated. The electrochemical impedance spectroscopy analysis sugges...

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Published in:Journal of materials science. Materials in electronics 2019-11, Vol.30 (22), p.20050-20057
Main Authors: Zhang, Huanhuan, Zhao, Lei, Jian, Binghua, jin, Jiang, Zhang, Hua
Format: Article
Language:English
Subjects:
Barium
Characterization and Evaluation of Materials
Chemistry and Materials Science
Crystal structure
Diffusion
Doping
Electrochemical analysis
Electrochemical impedance spectroscopy
Electrode polarization
Electrodes
Electrolytes
Free energy
Glycine
Heat of formation
Iron
Materials Science
Maximum power density
Nitrates
Optical and Electronic Materials
Oxygen
Vacancies
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Zhao, Lei
Jian, Binghua
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Zhang, Hua
description La 0.6−x Sr 0.4 Ba x Co 1−y Fe y O 3−δ (x = 0, 0.2, y = 0.1, 0.2, 0.3, 0.4) were prepared by the glycine–nitrate process. The electrochemical property and oxygen diffusion behavior of La 0.6−x Sr 0.4 Ba x Co 1−y Fe y O 3−δ were investigated. The electrochemical impedance spectroscopy analysis suggests that doping with an appropriate amount of iron and barium improves the catalytic performance. La 0.4 Sr 0.4 Ba 0.2 Co 0.9 Fe 0.1 O 3−δ calcined at 950 °C exhibits the minimum polarization resistance of 0.0349 Ω cm 2 at 750 °C. The doping of Fe improves the sintering performance. The crystalline size of La 0.6−x Sr 0.4 Ba x Co 1−y Fe y O 3−δ becomes smaller with the doping amount of Ba, which increase the number of active sites. The doping of Ba decreases the oxygen vacancy formation energy and increases the oxygen vacancy concentration, which accelerates the oxygen diffusion. Further, the single cell performance for La 0.4 Sr 0.4 Ba 0.2 Co 0.9 Fe 0.1 O 3−δ as cathode shows the maximum power density of 539.49 W cm −2 at 750 °C.
doi_str_mv 10.1007/s10854-019-02376-9
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The electrochemical property and oxygen diffusion behavior of La 0.6−x Sr 0.4 Ba x Co 1−y Fe y O 3−δ were investigated. The electrochemical impedance spectroscopy analysis suggests that doping with an appropriate amount of iron and barium improves the catalytic performance. La 0.4 Sr 0.4 Ba 0.2 Co 0.9 Fe 0.1 O 3−δ calcined at 950 °C exhibits the minimum polarization resistance of 0.0349 Ω cm 2 at 750 °C. The doping of Fe improves the sintering performance. The crystalline size of La 0.6−x Sr 0.4 Ba x Co 1−y Fe y O 3−δ becomes smaller with the doping amount of Ba, which increase the number of active sites. The doping of Ba decreases the oxygen vacancy formation energy and increases the oxygen vacancy concentration, which accelerates the oxygen diffusion. 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The electrochemical impedance spectroscopy analysis suggests that doping with an appropriate amount of iron and barium improves the catalytic performance. La 0.4 Sr 0.4 Ba 0.2 Co 0.9 Fe 0.1 O 3−δ calcined at 950 °C exhibits the minimum polarization resistance of 0.0349 Ω cm 2 at 750 °C. The doping of Fe improves the sintering performance. The crystalline size of La 0.6−x Sr 0.4 Ba x Co 1−y Fe y O 3−δ becomes smaller with the doping amount of Ba, which increase the number of active sites. The doping of Ba decreases the oxygen vacancy formation energy and increases the oxygen vacancy concentration, which accelerates the oxygen diffusion. Further, the single cell performance for La 0.4 Sr 0.4 Ba 0.2 Co 0.9 Fe 0.1 O 3−δ as cathode shows the maximum power density of 539.49 W cm −2 at 750 °C.</abstract><cop>New York</cop><pub>Springer US</pub><doi>10.1007/s10854-019-02376-9</doi><tpages>8</tpages><orcidid>https://orcid.org/0000-0001-8514-0958</orcidid></addata></record>
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subjects Barium
Characterization and Evaluation of Materials
Chemistry and Materials Science
Crystal structure
Diffusion
Doping
Electrochemical analysis
Electrochemical impedance spectroscopy
Electrode polarization
Electrodes
Electrolytes
Free energy
Glycine
Heat of formation
Iron
Materials Science
Maximum power density
Nitrates
Optical and Electronic Materials
Oxygen
Vacancies
title Oxygen diffusion and electrochemical performance of La0.6−xSr0.4BaxCo1−yFeyO3−δ
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