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 |
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Article number | 158269 |
Journal | Journal of Alloys and Compounds |
Volume | 856 |
DOIs | |
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