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Structural, electrochemical and corrosion resistance properties of ZnO/rGO nanocomposite for supercapacitor electrode material

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Abstract

In this work, zinc oxide/reduced graphene oxide (ZnO/rGO) nanocomposites have been synthesized by a chemical reduction approach with different concentrations of ZnO. The morphology, structural, optical and electrochemical, and corrosion properties characterizations of the synthesized ZnO/rGO nanocomposite were analysed. From XRD, the crystalline size of rGO was found to be 0.28 nm and the average crystallite size for the ZnO/rGO composite was found to be 36.62–30.56 nm from 5 and 7 wt%. The maximum specific capacitance of 7 wt% of ZnO/rGO was found to be 848 F g–1 at a scan rate of 10 mV s–1 with the potential window range of –0.3 to 0.3 in 1 M KCl as the electrolyte, when compared for GO. The cyclic stability of the specific capacitance was tested for 1000 cycles at 5 A g–1 current density, the result shows good cyclic stability, with a retention rate of 60.7%. The minimum values of corrosion potential (Ecorr) and corrosion current (Icorr) are 0.012 V and 2.17 A. The ZnO/rGO nanocomposite demonstrated high specific capacitance and strong supercapacitor capabilities.

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Acknowledgement

We acknowledge the Department of Chemistry, NIT Manipur, for providing the FTIR, XRD and electrochemical analysis facilities.

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Authors and Affiliations

  1. Department of Physics, National Institute of Technology Manipur, Imphal, 795004, India

    Sagolsem Nonganbi Chanu, Shubham Jha, Pukhrambam Sushma Devi & Bibhu Prasad Swain

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  1. Sagolsem Nonganbi Chanu
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  2. Shubham Jha
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  3. Pukhrambam Sushma Devi
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  4. Bibhu Prasad Swain
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Correspondence to Bibhu Prasad Swain.

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Chanu, S.N., Jha, S., Devi, P.S. et al. Structural, electrochemical and corrosion resistance properties of ZnO/rGO nanocomposite for supercapacitor electrode material. Bull Mater Sci 47, 33 (2024). https://doi.org/10.1007/s12034-023-03099-8

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