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Improved Electrochemical Performance of NTs-WS 2 @C Nanocomposites for Lithium-Ion and Sodium-Ion Batteries.
- Source :
-
ACS applied materials & interfaces [ACS Appl Mater Interfaces] 2022 Oct 19; Vol. 14 (41), pp. 46386-46400. Date of Electronic Publication: 2022 Oct 07. - Publication Year :
- 2022
-
Abstract
- Even though WS <subscript>2</subscript> nanotubes (NTs-WS <subscript>2</subscript> ) have great potential as anode materials for lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs) thanks to their unusual layered structure, their conductivity and cycling stability are far from satisfactory. To tackle these issues, carbon-coated WS <subscript>2</subscript> (NTs-WS <subscript>2</subscript> @C) nanocomposites were prepared through a facile synthesis method that involved precipitating a carbon precursor (20% sucrose) on WS <subscript>2</subscript> nanotubes, followed by annealing treatment under an argon environment. Thanks to the presence of highly conductive and mechanically robust carbon on the outer surface, NTs-WS <subscript>2</subscript> @C nanocomposites show improved electrochemical performance compared with bare NTs-WS <subscript>2</subscript> . After 60 cycles at 80 mA g <superscript>-1</superscript> current density, the cells display high capacities of 305 mAh g <superscript>-1</superscript> in LIBs and 152 mAh g <superscript>-1</superscript> in SIBs, respectively. As the current density increases to 600 mA g <superscript>-1</superscript> , it provides specific capacities of 209 and 115 mAh g <superscript>-1</superscript> , correspondingly. The enhanced electrochemical performance in LIBs and SIBs is primarily attributed to the synergistic effects of the tubular architecture of WS <subscript>2</subscript> , carbon network and stable nanocomposite structure, which can effectively constrain volume variation during the metal ions intercalation/deintercalation processes.
Details
- Language :
- English
- ISSN :
- 1944-8252
- Volume :
- 14
- Issue :
- 41
- Database :
- MEDLINE
- Journal :
- ACS applied materials & interfaces
- Publication Type :
- Academic Journal
- Accession number :
- 36206403
- Full Text :
- https://doi.org/10.1021/acsami.2c06295