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 journalArticle

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

Keywords

  • Distorted perovskite
  • Electrocatalyst
  • Li-O batteries
  • O-electrode
  • SeZnO

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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