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Development of Novel Cube-Embedded MnO2/ZnO Nanocomposite for OER Activity and Supercapacitor Performance Evaluation.

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Title: Development of Novel Cube-Embedded MnO2/ZnO Nanocomposite for OER Activity and Supercapacitor Performance Evaluation.
Authors: Waheed, Muhammad Suleman1 (AUTHOR), Alsalhi, Sarah A.2 (AUTHOR), Abdelmohsen, Shaimaa A. M.2 (AUTHOR), Zaman, Sher3 (AUTHOR), Ahmad, Sayam4 (AUTHOR), Aman, Salma5 (AUTHOR) salma.physics.kfu@gmail.com, Ahmad, Zubair6 (AUTHOR), Henaish, A. M. A.7,8 (AUTHOR), Al-Sehemi, Abdullah G.9,10 (AUTHOR), Taha, Taha Abdel Mohaymen11 (AUTHOR)
Source: JOM: The Journal of The Minerals, Metals & Materials Society (TMS). Jul2024, Vol. 76 Issue 7, p3665-3678. 14p.
Subjects: Supercapacitor performance, Nanocomposite materials, X-ray photoelectron spectroscopy, Oxygen evolution reactions, Scanning electron microscopes
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. [ABSTRACT FROM AUTHOR]
Copyright of JOM: The Journal of The Minerals, Metals & Materials Society (TMS) is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Development of Novel Cube-Embedded MnO<subscript>2</subscript>/ZnO Nanocomposite for OER Activity and Supercapacitor Performance Evaluation.
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  Data: <searchLink fieldCode="DE" term="%22Supercapacitor+performance%22">Supercapacitor performance</searchLink><br /><searchLink fieldCode="DE" term="%22Nanocomposite+materials%22">Nanocomposite materials</searchLink><br /><searchLink fieldCode="DE" term="%22X-ray+photoelectron+spectroscopy%22">X-ray photoelectron spectroscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Oxygen+evolution+reactions%22">Oxygen evolution reactions</searchLink><br /><searchLink fieldCode="DE" term="%22Scanning+electron+microscopes%22">Scanning electron microscopes</searchLink>
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  Data: 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. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of JOM: The Journal of The Minerals, Metals & Materials Society (TMS) is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s11837-024-06559-6
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        Text: English
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        PageCount: 14
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      – SubjectFull: Supercapacitor performance
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      – SubjectFull: Nanocomposite materials
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      – SubjectFull: X-ray photoelectron spectroscopy
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      – SubjectFull: Oxygen evolution reactions
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      – SubjectFull: Scanning electron microscopes
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              Text: Jul2024
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