Back to Search
Start Over
Rational nanostructured FeSe2 wrapped in nitrogen-doped carbon shell for high-rate capability and long cycling sodium-ion storage.
- Source :
-
Journal of Colloid & Interface Science . Sep2022, Vol. 622, p840-848. 9p. - Publication Year :
- 2022
-
Abstract
- [Display omitted] Transition metal selenides (TMSs) have drawn substantial attention as promising anode materials for sodium-ion batteries (SIBs) on account of their rapid reaction kinetics and high reversible capacity. However, the undesirable capacity decay and inferior rate performance still hamper their large-scale application. Herein, an anode material comprising combination of olivary nanostructure FeSe 2 core and nitrogen-doped carbon shell (designated as FeSe 2 @NC) is well designed by in-situ polymerization and selenization method. The well-designed nitrogen-doped carbon shell can not only alleviate the volume variation during the electrode cycling but also provide an optimized ion/electron transport pathway. The resulting FeSe 2 @NC electrodes exhibit a superior rate capability of 228.4 mA h g−1 at 10 A g−1 and a long cycling performance of 246.5 mA h g−1 at 5 A g−1 after 1000 cycles, which can be assigned to the enhanced structural integrity and improved electrical conductivity. The strategy would present a promising thought for structure design of TMSs as anode materials, which could enhance high-rate and long-lasting cycle performances for SIBs. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00219797
- Volume :
- 622
- Database :
- Academic Search Index
- Journal :
- Journal of Colloid & Interface Science
- Publication Type :
- Academic Journal
- Accession number :
- 157500033
- Full Text :
- https://doi.org/10.1016/j.jcis.2022.04.171