Preparation and performance of carbon dot decorated copper sulphide/carbon nanotubes hybrid composite as supercapacitor electrode materials
| Autor: | Tiehu Li, Ishaq Ahmad, Xiaofeng Lu, Heng Zhang, Jingtian Hu, Tao Jiang, Xin Zhao, Tingkai Zhao, Xiarong Peng |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Composite number chemistry.chemical_element 02 engineering and technology Carbon nanotube 010402 general chemistry Electrochemistry 01 natural sciences law.invention symbols.namesake law Materials Chemistry Supercapacitor Mechanical Engineering Metals and Alloys 021001 nanoscience & nanotechnology Copper 0104 chemical sciences chemistry Chemical engineering Mechanics of Materials Electrode Pseudocapacitor symbols 0210 nano-technology Raman spectroscopy |
| Zdroj: | Journal of Alloys and Compounds. 817:153057 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2019.153057 |
| Popis: | In this work, carbon dot decorated copper sulphide/carbon nanotubes (CuS@CD-CNTs) composite with a unique three-dimensional (3D) grape string-like structure was directly prepared via in situ hydrothermal process at the temperature of 180 °C for 12 h and applied for supercapacitors. The chemical composition and morphology were systematically tested by XRD, Raman, SEM and TEM characterization techniques. The as-prepared CuS@CD-CNTs composite brings out a novel 3D grape string-like structure, where the CuS spheres are distributed homogeneously with CNTs as a result of the addition of carbon dot. As the active material of pseudocapacitor electrode, the CuS@CD-CNTs composite delivers superior electrochemical properties with a decent specific capacitance of 736.1 F g−1 at the current density of 1 A g−1. Also, the CuS@CD-CNTs composite showed exceptional cycling stability, maintaining 92% retention after 5000 charge-discharge cycles. Such superior electrochemical properties owe to the collective contribution of CuS, CD and CNTs and 3D grape string-like architecture. The excellent electrochemical results above suggest that CuS@CD-CNTs composite has promising electrochemical energy storage application in supercapacitors. |
| Databáze: | OpenAIRE |
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