Orthorhombically distorted perovskite SeZnO3 nanosheets as an electrocatalyst for lithium-oxygen batteries

Yoon Seon Kim; Gwang Hee Lee; Myeong Chang Sung; Dong Wan Kim

doi:10.1016/j.cej.2020.126896

Orthorhombically distorted perovskite SeZnO₃ nanosheets as an electrocatalyst for lithium-oxygen batteries

Yoon Seon Kim, Gwang Hee Lee, Myeong Chang Sung, Dong Wan Kim

School of Civil, Environmental and Architectural Engineering

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

16 Citations (Scopus)

Abstract

Perovskite ABO₃ provides higher catalytic activity than binary metal oxides owing to crystallographic defects and oxygen vacancies due to the multivalence of the A and B cations. In this study, perovskite SeZnO₃ nanosheets were synthesized via a simple wet chemistry method with sodium dodecyl sulfate as the surfactant. Material surface analysis using O 1s X-ray photo-electron spectroscopy confirmed an O_vacancy concentration of 50%, confirming the presence of large amounts of defects on the surface of the SeZnO₃ nanosheets. The lithium-oxygen batteries with SeZnO₃ nanosheet as an oxygen-electrode electrocatalyst exhibited a high reversibility (140 cycles) and a stable rate capability (50–500 mA g⁻¹). Additionally, electrochemical impedance spectroscopy measurements indicated that the electronic conductivity of a SeZnO₃ nanosheet was higher than that of ZnO. Therefore, we propose that the unique SeZnO₃ structure exhibits excellent catalytic activity and electrical conductivity and can serve as a route towards improved lithium-oxygen batteries.

Original language	English
Article number	126896
Journal	Chemical Engineering Journal
Volume	406
DOIs	https://doi.org/10.1016/j.cej.2020.126896
Publication status	Published - 2021 Feb 15

Bibliographical note

Funding Information:
This work was supported by a Korea University Grant and, the National Research Foundation of Korea (NRF) Grant funded by the Ministry of Science, ICT and Future Planning [ NRF-2017R1C1B2004869 , 2019R1A2B5B02070203 , and 2018M3D1A1058744 ], South Korea. This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2020R1A6A1A03045059), South Korea.

Publisher Copyright:
© 2020 Elsevier B.V.

Keywords

Distorted perovskite
Electrocatalyst
Li-O batteries
O-electrode
SeZnO

ASJC Scopus subject areas

General Chemistry
Environmental Chemistry
General Chemical Engineering
Industrial and Manufacturing Engineering

Access to Document

10.1016/j.cej.2020.126896

Cite this

@article{0966c6fe360c47db9c17ed842228d655,

title = "Orthorhombically distorted perovskite SeZnO3 nanosheets as an electrocatalyst for lithium-oxygen batteries",

abstract = "Perovskite ABO3 provides higher catalytic activity than binary metal oxides owing to crystallographic defects and oxygen vacancies due to the multivalence of the A and B cations. In this study, perovskite SeZnO3 nanosheets were synthesized via a simple wet chemistry method with sodium dodecyl sulfate as the surfactant. Material surface analysis using O 1s X-ray photo-electron spectroscopy confirmed an Ovacancy concentration of 50%, confirming the presence of large amounts of defects on the surface of the SeZnO3 nanosheets. The lithium-oxygen batteries with SeZnO3 nanosheet as an oxygen-electrode electrocatalyst exhibited a high reversibility (140 cycles) and a stable rate capability (50–500 mA g−1). Additionally, electrochemical impedance spectroscopy measurements indicated that the electronic conductivity of a SeZnO3 nanosheet was higher than that of ZnO. Therefore, we propose that the unique SeZnO3 structure exhibits excellent catalytic activity and electrical conductivity and can serve as a route towards improved lithium-oxygen batteries.",

keywords = "Distorted perovskite, Electrocatalyst, Li-O batteries, O-electrode, SeZnO",

author = "Kim, {Yoon Seon} and Lee, {Gwang Hee} and Sung, {Myeong Chang} and Kim, {Dong Wan}",

note = "Funding Information: This work was supported by a Korea University Grant and, the National Research Foundation of Korea (NRF) Grant funded by the Ministry of Science, ICT and Future Planning [ NRF-2017R1C1B2004869 , 2019R1A2B5B02070203 , and 2018M3D1A1058744 ], South Korea. This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2020R1A6A1A03045059), South Korea. Publisher Copyright: {\textcopyright} 2020 Elsevier B.V.",

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AU - Kim, Yoon Seon

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AU - Kim, Dong Wan

N1 - Funding Information: This work was supported by a Korea University Grant and, the National Research Foundation of Korea (NRF) Grant funded by the Ministry of Science, ICT and Future Planning [ NRF-2017R1C1B2004869 , 2019R1A2B5B02070203 , and 2018M3D1A1058744 ], South Korea. This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2020R1A6A1A03045059), South Korea. Publisher Copyright: © 2020 Elsevier B.V.

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Y1 - 2021/2/15

N2 - Perovskite ABO3 provides higher catalytic activity than binary metal oxides owing to crystallographic defects and oxygen vacancies due to the multivalence of the A and B cations. In this study, perovskite SeZnO3 nanosheets were synthesized via a simple wet chemistry method with sodium dodecyl sulfate as the surfactant. Material surface analysis using O 1s X-ray photo-electron spectroscopy confirmed an Ovacancy concentration of 50%, confirming the presence of large amounts of defects on the surface of the SeZnO3 nanosheets. The lithium-oxygen batteries with SeZnO3 nanosheet as an oxygen-electrode electrocatalyst exhibited a high reversibility (140 cycles) and a stable rate capability (50–500 mA g−1). Additionally, electrochemical impedance spectroscopy measurements indicated that the electronic conductivity of a SeZnO3 nanosheet was higher than that of ZnO. Therefore, we propose that the unique SeZnO3 structure exhibits excellent catalytic activity and electrical conductivity and can serve as a route towards improved lithium-oxygen batteries.

AB - Perovskite ABO3 provides higher catalytic activity than binary metal oxides owing to crystallographic defects and oxygen vacancies due to the multivalence of the A and B cations. In this study, perovskite SeZnO3 nanosheets were synthesized via a simple wet chemistry method with sodium dodecyl sulfate as the surfactant. Material surface analysis using O 1s X-ray photo-electron spectroscopy confirmed an Ovacancy concentration of 50%, confirming the presence of large amounts of defects on the surface of the SeZnO3 nanosheets. The lithium-oxygen batteries with SeZnO3 nanosheet as an oxygen-electrode electrocatalyst exhibited a high reversibility (140 cycles) and a stable rate capability (50–500 mA g−1). Additionally, electrochemical impedance spectroscopy measurements indicated that the electronic conductivity of a SeZnO3 nanosheet was higher than that of ZnO. Therefore, we propose that the unique SeZnO3 structure exhibits excellent catalytic activity and electrical conductivity and can serve as a route towards improved lithium-oxygen batteries.

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