Non-Isothermal Decomposition as Efficient and Simple Synthesis Method of NiO/C Nanoparticles for Asymmetric Supercapacitors
| Autor: | A. L. Nikolaev, Nina V. Smirnova, Daria V. Chernysheva, Nikolay Leontyev, Ludmila Pudova, Olga Maslova, I. N. Leontyev, Mathieu Allix, Yuri V. Popov, Aydar Rakhmatullin |
|---|---|
| Přispěvatelé: | Conditions Extrêmes et Matériaux : Haute Température et Irradiation (CEMHTI), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université d'Orléans (UO) |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
General Chemical Engineering Composite number Analytical chemistry chemistry.chemical_element Nanoparticle nickel oxide 02 engineering and technology [CHIM.INOR]Chemical Sciences/Inorganic chemistry 010402 general chemistry 7. Clean energy 01 natural sciences Article Isothermal process lcsh:Chemistry NiO/C nanocomposite [CHIM.CRIS]Chemical Sciences/Cristallography [CHIM]Chemical Sciences General Materials Science supercapacitor Nanocomposite Nickel oxide Non-blocking I/O [CHIM.MATE]Chemical Sciences/Material chemistry 021001 nanoscience & nanotechnology Decomposition 0104 chemical sciences Nickel lcsh:QD1-999 chemistry non-isothermal decomposition 0210 nano-technology |
| Zdroj: | Nanomaterials Volume 11 Issue 1 Nanomaterials, MDPI, 2021, 11 (1), pp.187. ⟨10.3390/nano11010187⟩ Nanomaterials, Vol 11, Iss 187, p 187 (2021) |
| ISSN: | 2079-4991 |
| Popis: | A series of NiO/C nanocomposites with NiO concentrations ranging from 10 to 90 wt% was synthesized using a simple and efficient two-step method based on non-isothermal decomposition of Nickel(II) bis(acetylacetonate). X-ray diffraction (XRD) measurements of these NiO/C nanocomposites demonstrate the presence of &beta NiO. NiO/C nanocomposites are composed of spherical particles distributed over the carbon support surface. The average diameter of nickel oxide spheres increases with the NiO content and are estimated as 36, 50 and 205 nm for nanocomposites with 10, 50 and 80 wt% NiO concentrations, respectively. In turn, each NiO sphere contains several nickel oxide nanoparticles, whose average sizes are 7&ndash 8 nm. According to the tests performed using a three-electrode cell, specific capacitance (SC) of NiO/C nanocomposites increases from 200 to 400 F/g as the NiO content achieves a maximum of 60 wt% concentration, after which the SC decreases. The study of the NiO/C composite showing the highest SC in three- and two-electrode cells reveals that its SC remains almost unchanged while increasing the current density, and the sample demonstrates excellent cycling stability properties. Finally, NiO/C (60% NiO) composites are shown to be promising materials for charging quartz clocks with a power rating of 1.5 V (30 min). |
| Databáze: | OpenAIRE |
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