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Zn-BTC MOF as Self-Template to Hierarchical ZnS/NiS 2 Heterostructure with Improved Electrochemical Performance for Hybrid Supercapacitor.
- Source :
- Nanomaterials (2079-4991); Jan2024, Vol. 14 Issue 1, p22, 14p
- Publication Year :
- 2024
-
Abstract
- Zn-BTC (H3BTC refers to 1, 3, 5-benzoic acid) MOF was used as a self-template and a zinc source to prepare ZnS/NiS<subscript>2</subscript> with a layered heterogeneous structure as a promising electrode material using cation exchange and solid-phase vulcanization processes. The synergistic effect of the two metal sulfides enhances the application of ZnS/NiS<subscript>2</subscript>. And the high specific surface area and abundant active sites further promote the mass/charge transfer and redox reaction kinetics. In the three-electrode system, the specific capacitance was as high as 1547 F/g at a current density of 1 A/g, along with satisfactory rate capability (1214 F/g at 6 A/g) and cycling performance. Coupled with activated carbon (AC), the prepared hybrid device (ZnS/NiS<subscript>2</subscript> as the positive electrode and AC as the negative electrode) (ZnS/NiS<subscript>2</subscript>/AC) can be operated under a potential window of 1.6 V and provides a high energy density of 26.3 Wh/kg at a power density of 794 W/kg. Notably, the assembled ZnS/NiS<subscript>2</subscript>//AC showed little capacity degradation after 5000 charge/discharge cycles. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20794991
- Volume :
- 14
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Nanomaterials (2079-4991)
- Publication Type :
- Academic Journal
- Accession number :
- 174718751
- Full Text :
- https://doi.org/10.3390/nano14010022