Boosting the electrochemical performance of ZnO nanomaterials through a conductive CuS matrix for aqueous supercapacitors

Mubeen, Khalida; Shah, Muhammad Zia Ullah; Irshad, Afshan; Ali, Zahid; Zafar, Zainab; Shah, A. F. M. Shahen

doi:10.1039/d2nj05744a

Cited by 4 publications

(1 citation statement)

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“…The capacitor uses a novel electrode with a vanadium pentoxide/zinc oxide (V 2 O 5 /ZnO) stacked structure and is optically responsive. Mubeen et al [70] reported novel ZnO/CuS composite materials with different CuS ratios used as the electrode materials for supercapacitor applications. The capacitive performances of ZnO/CuS electrodes were measured in a three-electrode cell, where a capacitance of 487 F g −1 , a high-power density of 13,448 W kg −1 , and a maximum energy density of 26 W h kg −1 were achieved.…”

Section: Introductionmentioning

confidence: 99%

Enhancing the Electrochemical Performance of ZnO-Co3O4 and Zn-Co-O Supercapacitor Electrodes Due to the In Situ Electrochemical Etching Process and the Formation of Co3O4 Nanoparticles

Abdullin,

Gabdullin,

Kalkozova

et al. 2024

Energies

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Zinc oxide (ZnO) and materials based on it are often used to create battery-type supercapacitor electrodes and are considered as promising materials for hybrid asymmetric supercapacitors. However, when creating such electrodes, it is necessary to take into account the instability and degradation of zinc oxide in aggressive environments with a non-neutral pH. To the best of our knowledge, studies of the changes in the properties of ZnO-containing electrodes in alkaline electrolytes have not been carried out. In this work, changes in the structure and properties of these electrodes under alkaline treatment were investigated using the example of ZnO-containing composites, which are often used for the manufacturing of supercapacitor electrodes. Supercapacitor electrodes made of two materials containing ZnO were studied: (i) a heterogeneous ZnO-Co3O4 system, and (ii) a hexagonal h-Zn-Co-O solid solution. A comparison was made between the structure and properties of these materials before and after in situ electrochemical oxidation in the process of measuring cyclic voltammetry and galvanostatic charge/discharge. It has been shown that the structure of both nanoparticles of the heterogeneous ZnO-Co3O4 system and the h-Zn-Co-O solid solution changes due to the dissolution of ZnO in the alkaline electrolyte 3.5 M KOH, with the short-term alkaline treatment producing cobalt and zinc hydroxides, and long-term exposure leading to electrochemical cyclic oxidation–reduction, forming cobalt oxide Co3O4. Since the resulting cobalt oxide nanoparticles are immobilized in the electrode structure, a considerable specific capacity of 446 F g−1 or 74.4 mA h g−1 is achieved at a mass loading of 0.0105 g. The fabricated hybrid capacitor showed a good electrochemical performance, with a series resistance of 0.2 Ohm and a capacitance retention of 87% after 10,000 cycles.

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Section: Introductionmentioning

confidence: 99%

Enhancing the Electrochemical Performance of ZnO-Co3O4 and Zn-Co-O Supercapacitor Electrodes Due to the In Situ Electrochemical Etching Process and the Formation of Co3O4 Nanoparticles

Abdullin,

Gabdullin,

Kalkozova

et al. 2024

Energies

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Hydrothermal Synthesis of a Layered ZnO@MnO2 Nanocomposite for High-Performance Supercapacitor Electrodes

Gupta,

Kumar,

Shukla

2024

J. Electron. Mater.

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ZnO nanostructures – Future frontiers in photocatalysis, solar cells, sensing, supercapacitor, fingerprint technologies, toxicity, and clinical diagnostics

Ansari,

Lv,

Gai

et al. 2024

Coordination Chemistry Reviews

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Boosting the electrochemical performance of ZnO nanomaterials through a conductive CuS matrix for aqueous supercapacitors

Abstract: The impressive electrochemical performance of metal oxides/metal sulfides and their derivatives are proven to be innovative electrodes for achieving a remarkable performance for supercapacitors.

Cited by 4 publications

References 63 publications

Enhancing the Electrochemical Performance of ZnO-Co3O4 and Zn-Co-O Supercapacitor Electrodes Due to the In Situ Electrochemical Etching Process and the Formation of Co3O4 Nanoparticles

Enhancing the Electrochemical Performance of ZnO-Co3O4 and Zn-Co-O Supercapacitor Electrodes Due to the In Situ Electrochemical Etching Process and the Formation of Co3O4 Nanoparticles

Hydrothermal Synthesis of a Layered ZnO@MnO2 Nanocomposite for High-Performance Supercapacitor Electrodes

ZnO nanostructures – Future frontiers in photocatalysis, solar cells, sensing, supercapacitor, fingerprint technologies, toxicity, and clinical diagnostics

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