Investigation on structural, optical and electrochemical behavior of NiO/ZnMn2O4 ternary nanocomposites via two-step synthesis approach for supercapacitor application
| Autor: | N. Senthilkumar, J. Joseph Prince, M. John Abel, P. Anbalagan, C Lydia Pearline, A. Pramothkumar |
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| Rok vydání: | 2020 |
| Předmět: |
Nanocomposite
Materials science General Chemical Engineering Nickel oxide Non-blocking I/O 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Biochemistry Industrial and Manufacturing Engineering 0104 chemical sciences Dielectric spectroscopy Field emission microscopy Tetragonal crystal system Chemical engineering Materials Chemistry Cyclic voltammetry 0210 nano-technology Powder diffraction |
| Zdroj: | Chemical Papers. 75:641-651 |
| ISSN: | 1336-9075 2585-7290 |
| DOI: | 10.1007/s11696-020-01258-3 |
| Popis: | The present investigation deals with the synthesis of nickel oxide (NiO)/zinc manganite (ZnMn2O4) nanocomposites (NCs) by a two-step approach. The powder X-ray diffraction (PXRD) pattern revealed the existence of face-centered cubic (FCC) phase of NiO and tetragonal rutile phase structure of ZnMn2O4 in NiO/ZnMn2O4 NCs. The optical properties of NiO/ZnMn2O4NCs have been investigated by the UV-diffuse reflectance Spectroscopy (UV-DRS) and photoluminescence (PL) spectral analysis. The surface morphology and elemental composition of NiO/ZnMn2O4NCs was investigated by field emission scanning electron microscope (FESEM) and energy-dispersive X-ray spectrum (EDX) analysis. The surface area and the nature of porosity of the samples were analyzed using Brunauer–Emmett–Teller (BET) method. The electrochemical properties were investigated from the cyclic voltammetry (CV), galvanostatic charge discharge (GCD) and electrochemical impedance spectroscopy (EIS) measurements. In 0.5 M potassium hydroxide (KOH) electrolyte solution, NiO/ZnMn2O4NCs exhibited higher specific capacitance of 886 F/g at a current density of 1Ag−1 with high cyclic stability over 1000 charge–discharging cycles. Thus, the result demonstrates that the prepared NiO/ZnMn2O4NCs is a promising electrode material for future energy-storage devices. |
| Databáze: | OpenAIRE |
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