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

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

Research output: Contribution to journalArticlepeer-review

13 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 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.

Original languageEnglish
Article number126896
JournalChemical Engineering Journal
Volume406
DOIs
Publication statusPublished - 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

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