Abstract
The development of an inexpensive, efficient, and sustainable material suitable for energy storage applications is the need of modern era. Due to their affordability, eco-friendliness, high efficiency, and unique electronic structure metal oxides are the favorable candidate for this purpose. Here, the most desirable MnO2/ZnO nanocomposites were fabricated via hydrothermal route. The successful fabrication of synthetic material was confirmed via X-ray diffraction, Fourier-transform infrared spectroscopy, scanning electron microscope, Raman spectroscopy, and X-ray photoelectron spectroscopy by analyzing the crystal structure, functionality, morphology, chemical property, and electronic properties. The electrochemical study was carried out in 1.0 M KOH (alkaline media) to assess the electrochemical performance of the fabricated composite materials for oxygen evolution reaction (OER) and supercapacitors. For this purpose, several various tests, like cyclic voltammetry, linear sweep voltammetry, galvanostatic charge discharge, and electrochemical impedance spectroscopy were performed. The electrochemical results revealed that the fabricated MnO2/ZnO nanocomposite has a Tafel slope and overpotential of 33.7 mV dec−1 and 274 mV, respectively. The small values of the Tafel slope and overpotential confirmed that our fabricated MnO2/ZnO nanocomposite is a potential candidate for OER. Moreover, the resultant MnO2/ZnO nanocomposite has a specific capacitance of 1038.3 F g−1 and a power density of 396.3 Wh kg−1. All these results confirmed that the fabricated MnO2/ZnO nanocomposite is a potential candidate for energy storage applications.
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The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
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Acknowledgements
The Deanship of Scientific Research at King Khalid University is greatly appreciated for funding (R.G.P-1/356/44). The authors express their gratitude to Princess Nourah bint Abdulrahman University Researchers Supporting Project number (PNURSP2024R453), Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia. A.M.A. Henaish thanks to Ministry of Science and Higher Education of the Russian Federation (Ural Federal University Program of Development within the Priority-2030 Program) for financial support.
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Waheed, M.S., Alsalhi, S.A., Abdelmohsen, S.A.M. et al. Development of Novel Cube-Embedded MnO2/ZnO Nanocomposite for OER Activity and Supercapacitor Performance Evaluation. JOM (2024). https://doi.org/10.1007/s11837-024-06559-6
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DOI: https://doi.org/10.1007/s11837-024-06559-6