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Fabrication of FeCo2S4/Ag NWs/G Ternary Nanocomposites with Honeycomb-Like Nanostructure for High-Performance Supercapacitors
- Source :
- Journal of Electronic Materials. 50:6353-6362
- Publication Year :
- 2021
- Publisher :
- Springer Science and Business Media LLC, 2021.
-
Abstract
- Ferric cobalt sulfide/silver nanowires/graphene (FeCo2S4/Ag NWs/G) ternary nanocomposites with hierarchical honeycomb-like morphology have been obtained through hydrothermal synthesis. In the FeCo2S4/Ag NWs/G composite electrode, the Ag NWs provide effective electron transport channels and prevent the graphene and FeCo2S4 nanosheets from aggregating. The graphene sheets can not only provide connected channels for ion transportation and charge transfer but also significantly buffer the volume change of electrode. As a result, the as-prepared FeCo2S4/Ag NWs/G composite electrode exhibits a high specific capacitance of 2689.2 F/g at a current density of 1 A/g, and excellent capacitance retention of 96.1% after 5000 charge–discharge cycles. In addition, an asymmetric supercapacitor was fabricated using FeCo2S4/Ag NWs/G as positive electrode and flower-like hierarchical porous nitrogen-doped carbon sphere as negative electrode. The assembled supercapacitor delivered a high energy density of 80.6 Wh/kg at a power density of 806 W/kg. These results demonstrate that such FeCo2S4/Ag NWs/G nanocomposites have widespread application prospects in the field of electrochemical energy storage.
- Subjects :
- Supercapacitor
Nanostructure
Nanocomposite
Materials science
Graphene
Condensed Matter Physics
Capacitance
Cobalt sulfide
Electronic, Optical and Magnetic Materials
law.invention
chemistry.chemical_compound
Chemical engineering
chemistry
law
Electrode
Materials Chemistry
Electrical and Electronic Engineering
Ternary operation
Subjects
Details
- ISSN :
- 1543186X and 03615235
- Volume :
- 50
- Database :
- OpenAIRE
- Journal :
- Journal of Electronic Materials
- Accession number :
- edsair.doi...........1a28755b56f522a373b29ce84d4fd3af