Facile synthesis of N-doped NiCo2S4/CNTs with coordinated effects as cathode materials for high-performance supercapacitors
| Autor: | Mingxing Wang, Yonghao Hao, Zhongbing Wang, Chunnian Chen |
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| Rok vydání: | 2021 |
| Předmět: |
Supercapacitor
Materials science Nanocomposite General Chemical Engineering Doping General Engineering General Physics and Astronomy 02 engineering and technology Carbon nanotube 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Capacitance Energy storage Cathode 0104 chemical sciences law.invention Chemical engineering law General Materials Science 0210 nano-technology |
| Zdroj: | Ionics. 27:3567-3578 |
| ISSN: | 1862-0760 0947-7047 |
| Popis: | In this paper, a two-step hydrothermal method was used to prepare NiCo2S4/N-CNT nanocomposites with excellent cycling performance. N-doped carbon nanotubes occur coordination effect; it is conducive to enhancing the overall electrochemical effects of NiCo2S4. Besides, the introduction of carbon nanotubes (CNTs) greatly improved the cycling stability of the materials. Electrochemical tests show that the NiCo2S4/N-CNT composite materials have an ultra-high specific capacitance of 1428 F g−1 at 1 A g−1, while the capacitance of pure NiCo2S4 is 733.5 F g−1. After 4000 charge and discharge cycles, the capacitance of NiCo2S4/N-CNT electrode materials still maintains 80.2%, while the retention rate of NiCo2S4 materials is only 60.2%. Compared with the electrochemical performance of NiCo2S4 materials reported by most people, it has greatly improved. Therefore, the NiCo2S4/N-CNT composite material is a promising electrode material. |
| Databáze: | OpenAIRE |
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