Abstract
The flower-like NiO and Co-doped NiO mesoporous microspheres were successfully synthesized via hydrothermal method. The structural, morphological and electrochemical properties were studied. The X-ray diffraction analysis reveals the formation of cubic-structured NiO in both the samples. Pore size distribution spectrum confirms the mesoporous nature of the NiO and Co-doped NiO samples. Scanning electron microscopic images shows the formation of NiO and Co-doped NiO microspheres. The electrochemical nature of the NiO based samples were studied using cyclic voltammetric (CV), galvanostatic charge-discharge (GCD) and impedance analysis. The doping of Co enhances the electrochemical properties of NiO. GCD analysis exhibits the specific capacitance of 927 and 1052 Fg−1 at 1 A g−1 for NiO and Co doped NiO microspheres, respectively. The Co-doped NiO microspheres retained 100% of maximum capacitance even after 1000 cycles.
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Acknowledgement One of the authors (K.K.P.) thanks Department of Science and Technology-SERC, New Delhi, India, for providing the financial support under Young Scientist scheme(SR/FTP/PS-030/2011).
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Material preparation, data collection and analysis were performed by [KKP]. The analysis and first draft of the manuscript was written by [SV].
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Purushothaman, K.K., Vijayakumar, S. Flower like cobalt-doped nickel oxide mesoporous microspheres for supercapacitor applications. J Mater Sci: Mater Electron 35, 493 (2024). https://doi.org/10.1007/s10854-024-12184-5
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DOI: https://doi.org/10.1007/s10854-024-12184-5