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

Heewon Yoo, Gwang Hee Lee, Dong Wan Kim

Research output: Contribution to journalArticlepeer-review


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 languageEnglish
Article number158269
JournalJournal of Alloys and Compounds
Publication statusPublished - 2021 Mar 5


  • 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

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