Sodium dodecyl sulphate assisted hydrothermally synthesized hexagonal prismatic nanocrystalline zinc cobaltite for high performance supercapacitors
| Autor: | A. Lakshmi Narayana, Obili M. Hussain, N.Y.Sreedhar, N. Varalakshmi, Dasari Rekha |
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| Rok vydání: | 2019 |
| Předmět: |
Hexagonal prism
Materials science General Chemical Engineering General Engineering General Physics and Astronomy chemistry.chemical_element 02 engineering and technology Zinc 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Grain size Nanocrystalline material 0104 chemical sciences Cobaltite chemistry.chemical_compound chemistry Chemical engineering Electrode General Materials Science Crystallite 0210 nano-technology |
| Zdroj: | Ionics. 25:3897-3905 |
| ISSN: | 1862-0760 0947-7047 |
| DOI: | 10.1007/s11581-019-02949-y |
| Popis: | Hexagonal prismatic nanocrystalline ZnCo2O4 (HPNZCO) has been successfully synthesized via sodium dodecyl sulphate-assisted facile hydrothermal method. The crystallographic analysis revealed that the obtained compound is in pure ZnCo2O4 phase with Fd $$ \overline{\ 3} $$ m space group and the estimated crystallite size is 10 nm. The surface morphological features depict homogenously distributed hexagonal prism grains with an average grain size of less than 10 nm. TEM analysis revealed that the hexagonal morphology prisms are closely packed together as a group and facilitate large electrochemical active sites for the redox reactions and accelerate ion transport during the electrochemical process. The HPNZCO electrode delivered the highest specific capacitance (CS) of 1060 F g−1 at a current density of 1 A g−1 and retained 93% of capacitance even after 5000 cycles, suggesting its excellent cycling stability. The demonstrations infer that the HPNZCO electrode opens up new opportunities for next-generation high performance supercapacitors. |
| Databáze: | OpenAIRE |
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