Preparation and improvement electrochemical properties of transition metal Zn-doped NiS nanospheres
| Autor: | G. M. Qu, Yanling Wang, X. Q. Wei |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Scanning electron microscope General Chemical Engineering Doping General Engineering General Physics and Astronomy 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Capacitance 0104 chemical sciences law.invention Transition metal Transmission electron microscopy law General Materials Science Cyclic voltammetry Crystallization 0210 nano-technology Nuclear chemistry |
| Zdroj: | Ionics. 26:895-903 |
| ISSN: | 1862-0760 0947-7047 |
| DOI: | 10.1007/s11581-019-03200-4 |
| Popis: | In this paper, the NiS- and Zn-doped NiS nanospheres were prepared by solvothermal method, respectively. The structural characterizations are studied by scanning electron microscope (SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM), and energy dispersive spectrometer (EDS). The results show that the NiS- and Zn-doped NiS nanospheres with high specific surface areas and perfect crystallization were obtained. The Ni atoms are replaced partly by Zn atoms in NiS by doping. Electrochemical performance was tested by cyclic voltammetry (CV), the galvanostatic charge-discharge analysis (GCD), and electrochemical impedance spectrometry (EIS). The experimental results show that the synthesized Zn-doped NiS nanospheres exhibit better rate capability and cyclic stability than that of pure NiS microspheres. The electrochemical performance of obtained Zn-doped NiS nanospheres with the high specific capacitance of 894.3 F g−1 at 1 A g−1 has been dominantly improved. |
| Databáze: | OpenAIRE |
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