FeSe hollow spheroids as electrocatalysts for high-rate Li–O2 battery cathodes

Heewon Yoo; Gwang Hee Lee; Dong Wan Kim

doi:10.1016/j.jallcom.2020.158269

FeSe hollow spheroids as electrocatalysts for high-rate Li–O₂ battery cathodes

Heewon Yoo, Gwang Hee Lee, Dong Wan Kim

School of Civil, Environmental and Architectural Engineering

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

6 Citations (Scopus)

Abstract

In this study, FeSe hollow spheroids were prepared for application as cathode electrocatalysts in Li–O₂ batteries. The hollow spheroids were synthesized through hydrothermal and thermal selenization processing based on a silk–fibroin template. At the high current rate of 1000 mA g⁻¹, the FeSe spheroids exhibited higher reversibility (100 cycles) and a similar voltage gap to that at 200 mA g⁻¹. Therefore, FeSe hollow spheroids exhibit high oxygen reduction/evolution catalytic efficiency for high–rate Li–O₂ batteries. This result was demonstrated via comparison of the oxygen reduction/evolution kinetics of FeSe and Fe₂O₃ hollow spheroids using electrochemical impedance spectroscopy.

Original language	English
Article number	158269
Journal	Journal of Alloys and Compounds
Volume	856
DOIs	https://doi.org/10.1016/j.jallcom.2020.158269
Publication status	Published - 2021 Mar 5

Bibliographical note

Funding Information:
This work was supported by a Korea University Grant, South Korea , and, the National Research Foundation of Korea (NRF) Grant funded by the Ministry of Science, ICT, and Future Planning [ NRF-2017R1C1B2004869 , 2019R1A2B5B02070203 ], 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

Electrocatalyst
High–rate performance
Hollow spheroids
Iron selenide
Li–O battery

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/j.jallcom.2020.158269

Cite this

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title = "FeSe hollow spheroids as electrocatalysts for high-rate Li–O2 battery cathodes",

abstract = "In this study, FeSe hollow spheroids were prepared for application as cathode electrocatalysts in Li–O2 batteries. The hollow spheroids were synthesized through hydrothermal and thermal selenization processing based on a silk–fibroin template. At the high current rate of 1000 mA g−1, the FeSe spheroids exhibited higher reversibility (100 cycles) and a similar voltage gap to that at 200 mA g−1. Therefore, FeSe hollow spheroids exhibit high oxygen reduction/evolution catalytic efficiency for high–rate Li–O2 batteries. This result was demonstrated via comparison of the oxygen reduction/evolution kinetics of FeSe and Fe2O3 hollow spheroids using electrochemical impedance spectroscopy.",

keywords = "Electrocatalyst, High–rate performance, Hollow spheroids, Iron selenide, Li–O battery",

author = "Heewon Yoo and Lee, {Gwang Hee} and Kim, {Dong Wan}",

note = "Funding Information: This work was supported by a Korea University Grant, South Korea , and, the National Research Foundation of Korea (NRF) Grant funded by the Ministry of Science, ICT, and Future Planning [ NRF-2017R1C1B2004869 , 2019R1A2B5B02070203 ], 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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doi = "10.1016/j.jallcom.2020.158269",

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AU - Yoo, Heewon

AU - Lee, Gwang Hee

AU - Kim, Dong Wan

N1 - Funding Information: This work was supported by a Korea University Grant, South Korea , and, the National Research Foundation of Korea (NRF) Grant funded by the Ministry of Science, ICT, and Future Planning [ NRF-2017R1C1B2004869 , 2019R1A2B5B02070203 ], 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.

PY - 2021/3/5

Y1 - 2021/3/5

N2 - In this study, FeSe hollow spheroids were prepared for application as cathode electrocatalysts in Li–O2 batteries. The hollow spheroids were synthesized through hydrothermal and thermal selenization processing based on a silk–fibroin template. At the high current rate of 1000 mA g−1, the FeSe spheroids exhibited higher reversibility (100 cycles) and a similar voltage gap to that at 200 mA g−1. Therefore, FeSe hollow spheroids exhibit high oxygen reduction/evolution catalytic efficiency for high–rate Li–O2 batteries. This result was demonstrated via comparison of the oxygen reduction/evolution kinetics of FeSe and Fe2O3 hollow spheroids using electrochemical impedance spectroscopy.

AB - In this study, FeSe hollow spheroids were prepared for application as cathode electrocatalysts in Li–O2 batteries. The hollow spheroids were synthesized through hydrothermal and thermal selenization processing based on a silk–fibroin template. At the high current rate of 1000 mA g−1, the FeSe spheroids exhibited higher reversibility (100 cycles) and a similar voltage gap to that at 200 mA g−1. Therefore, FeSe hollow spheroids exhibit high oxygen reduction/evolution catalytic efficiency for high–rate Li–O2 batteries. This result was demonstrated via comparison of the oxygen reduction/evolution kinetics of FeSe and Fe2O3 hollow spheroids using electrochemical impedance spectroscopy.

KW - Electrocatalyst

KW - High–rate performance

KW - Hollow spheroids

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