Self-assembled three-dimensional hierarchical CoMoO4 nanosheets on NiCo2O4 for high-performance supercapacitor
| Autor: | Yunrui Tian, Yueli Wu, Wenbin Guo, Weike Wang, Xiaojie Lian, Junzhi Li, Shuang Wang |
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| Rok vydání: | 2019 |
| Předmět: |
Supercapacitor
Materials science Mechanical Engineering Metals and Alloys 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Redox Capacitance Hydrothermal circulation 0104 chemical sciences chemistry.chemical_compound chemistry Chemical engineering Mechanics of Materials Electrode Materials Chemistry Ethylamine 0210 nano-technology Porosity |
| Zdroj: | Journal of Alloys and Compounds. 793:418-424 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2019.04.189 |
| Popis: | Highly regular three-dimensional (3D) NiCo2O4/CoMoO4 hierarchical nanosheets (NSs) were prepared through a simple hydrothermal process. During the hydrothermal process, ethylamine solution is crucial for the morphology of NiCo2O4/CoMoO4 NSs and self-assembled formation of CoMoO4 with porous architecture on NiCo2O4. Such curly porous hierarchical structure with large surface areas is benefit to provide numerous accessible electrochemically active sites for faradaic redox reactions. In addition, the morphologies and the mass loading adjustment of NiCo2O4/CoMoO4 NSs can be easily achieved by controlling growth time. The as-prepared NiCo2O4/CoMoO4 electrode demonstrates superior specific capacitance (1730 F/g at 1 A/g), satisfied rate capability (60%, at 20 A/g), and excellent cycling stability (76.2% capacitance retention at 10 A/g). These good electrochemical performances exhibit that the as-obtained NiCo2O4/CoMoO4 composites are efficient electrode materials for pseudo-capacitors and may provide a useful guidance for obtaining electrode materials with outstanding electrochemical performance. |
| Databáze: | OpenAIRE |
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