Rationalizing the catalytic surface area of oxygen vacancy-enriched layered perovskite LaSrCrO4 nanowires on oxygen electrocatalyst for enhanced performance of Li–O2 batteries

Myeong Chang Sung; Chan Ho Kim; Byoungjoon Hwang; Dong Wan Kim

doi:10.1002/cey2.550

Rationalizing the catalytic surface area of oxygen vacancy-enriched layered perovskite LaSrCrO₄ nanowires on oxygen electrocatalyst for enhanced performance of Li–O₂ batteries

Myeong Chang Sung
, Chan Ho Kim
, Byoungjoon Hwang
, Dong Wan Kim

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

7 Scopus citations

Abstract

Efficient electrocatalysis at the cathode is crucial to addressing the limited stability and low rate capability of Li−O₂ batteries. This study examines the kinetic behavior of Li−O₂ batteries utilizing layered perovskite LaSrCrO₄ nanowires (NWs) composed of lower oxidation states. Layered perovskite LaSrCrO₄ NWs exhibited improved rate capability over a wide range of current densities and longer cycle life in Li−O₂ batteries than V-based layered perovskite (LaSrVO₄) and simple perovskite (La_0.8Sr_0.2CrO₃) NWs. X-ray photoelectron spectroscopy and electrochemical surface area analyses showed that the observed performance variations primarily stemmed from active sites such as oxygen vacancies. In situ Raman analysis showed that these active sites significantly modulate the kinetics of oxygen reduction and evolution, which are related to LiO₂ intermediate adsorption. Electrochemical impedance spectroscopy showed that the active sites in layered perovskite LaSrCrO₄ NWs contributed to their high charge transfer capability and reduced polarization. This study presents an appealing method for the precise fabrication and analysis of Cr-based layered perovskites, aimed at achieving highly efficient and stable bifunctional oxygen electrocatalysis.

Original language	English
Article number	e550
Journal	Carbon Energy
Volume	6
Issue number	10
DOIs	https://doi.org/10.1002/cey2.550
State	Published - Oct 2024
Externally published	Yes

Funding

This work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Ministry of Science and ICT (2022R1A2C3003319), and by the Creative Materials Discovery Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2020R1A6A1A03045059). This work was supported by a Korea University Grant. This work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Ministry of Science and ICT (2022R1A2C3003319), and by the Creative Materials Discovery Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2020R1A6A1A03045059). This work was supported by a Korea University Grant.

Keywords

Cr-based layered perovskite
LaSrCrO
Li−O batteries
bifunctional electrocatalysts
oxygen vacancies

Access to Document

10.1002/cey2.550

Cite this

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title = "Rationalizing the catalytic surface area of oxygen vacancy-enriched layered perovskite LaSrCrO4 nanowires on oxygen electrocatalyst for enhanced performance of Li–O2 batteries",

abstract = "Efficient electrocatalysis at the cathode is crucial to addressing the limited stability and low rate capability of Li−O2 batteries. This study examines the kinetic behavior of Li−O2 batteries utilizing layered perovskite LaSrCrO4 nanowires (NWs) composed of lower oxidation states. Layered perovskite LaSrCrO4 NWs exhibited improved rate capability over a wide range of current densities and longer cycle life in Li−O2 batteries than V-based layered perovskite (LaSrVO4) and simple perovskite (La0.8Sr0.2CrO3) NWs. X-ray photoelectron spectroscopy and electrochemical surface area analyses showed that the observed performance variations primarily stemmed from active sites such as oxygen vacancies. In situ Raman analysis showed that these active sites significantly modulate the kinetics of oxygen reduction and evolution, which are related to LiO2 intermediate adsorption. Electrochemical impedance spectroscopy showed that the active sites in layered perovskite LaSrCrO4 NWs contributed to their high charge transfer capability and reduced polarization. This study presents an appealing method for the precise fabrication and analysis of Cr-based layered perovskites, aimed at achieving highly efficient and stable bifunctional oxygen electrocatalysis.",

keywords = "Cr-based layered perovskite, LaSrCrO, Li−O batteries, bifunctional electrocatalysts, oxygen vacancies",

author = "Sung, \{Myeong Chang\} and Kim, \{Chan Ho\} and Byoungjoon Hwang and Kim, \{Dong Wan\}",

note = "Publisher Copyright: {\textcopyright} 2024 The Authors. Carbon Energy published by Wenzhou University and John Wiley \& Sons Australia, Ltd.",

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AU - Hwang, Byoungjoon

AU - Kim, Dong Wan

PY - 2024/10

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N2 - Efficient electrocatalysis at the cathode is crucial to addressing the limited stability and low rate capability of Li−O2 batteries. This study examines the kinetic behavior of Li−O2 batteries utilizing layered perovskite LaSrCrO4 nanowires (NWs) composed of lower oxidation states. Layered perovskite LaSrCrO4 NWs exhibited improved rate capability over a wide range of current densities and longer cycle life in Li−O2 batteries than V-based layered perovskite (LaSrVO4) and simple perovskite (La0.8Sr0.2CrO3) NWs. X-ray photoelectron spectroscopy and electrochemical surface area analyses showed that the observed performance variations primarily stemmed from active sites such as oxygen vacancies. In situ Raman analysis showed that these active sites significantly modulate the kinetics of oxygen reduction and evolution, which are related to LiO2 intermediate adsorption. Electrochemical impedance spectroscopy showed that the active sites in layered perovskite LaSrCrO4 NWs contributed to their high charge transfer capability and reduced polarization. This study presents an appealing method for the precise fabrication and analysis of Cr-based layered perovskites, aimed at achieving highly efficient and stable bifunctional oxygen electrocatalysis.

AB - Efficient electrocatalysis at the cathode is crucial to addressing the limited stability and low rate capability of Li−O2 batteries. This study examines the kinetic behavior of Li−O2 batteries utilizing layered perovskite LaSrCrO4 nanowires (NWs) composed of lower oxidation states. Layered perovskite LaSrCrO4 NWs exhibited improved rate capability over a wide range of current densities and longer cycle life in Li−O2 batteries than V-based layered perovskite (LaSrVO4) and simple perovskite (La0.8Sr0.2CrO3) NWs. X-ray photoelectron spectroscopy and electrochemical surface area analyses showed that the observed performance variations primarily stemmed from active sites such as oxygen vacancies. In situ Raman analysis showed that these active sites significantly modulate the kinetics of oxygen reduction and evolution, which are related to LiO2 intermediate adsorption. Electrochemical impedance spectroscopy showed that the active sites in layered perovskite LaSrCrO4 NWs contributed to their high charge transfer capability and reduced polarization. This study presents an appealing method for the precise fabrication and analysis of Cr-based layered perovskites, aimed at achieving highly efficient and stable bifunctional oxygen electrocatalysis.

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