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Effect of Time on a Hierarchical Corn Skeleton-Like Composite of CoO@ZnO as Capacitive Electrode Material for High Specific Performance Supercapacitors

Author

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  • Yedluri Anil Kumar

    (School of Electrical Engineering, Pusan National University, Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 46241, Korea)

  • Hee-Je Kim

    (School of Electrical Engineering, Pusan National University, Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 46241, Korea)

Abstract

CoO–ZnO-based composites have attracted considerable attention for the development of energy storage devices because of their multifunctional characterization and ease of integration with existing components. This paper reports the synthesis of CoO@ZnO (CZ) nanostructures on Ni foam by the chemical bath deposition (CBD) method for facile and eco-friendly supercapacitor applications. The formation of a CoO@ZnO electrode functioned with cobalt, zinc, nickel and oxygen groups was confirmed by X-ray diffraction (XRD) analysis, X-ray photoelectron spectroscopy (XPS), low and high-resolution scanning electron microscopy (SEM), and transmission electron microscopy (TEM) analysis. The as-synthesized hierarchical nanocorn skeleton-like structure of a CoO@ZnO-3h (CZ3h) electrode delivered a higher specific capacitance (C s ) of 1136 F/g at 3 A/g with outstanding cycling performance, showing 98.3% capacitance retention over 3000 cycles in an aqueous 2 M KOH electrolyte solution. This retention was significantly better than that of other prepared electrodes, such as CoO, ZnO, CoO@ZnO-1h (CZ1h), and CoO@ZnO-7h (CZ7h) (274 F/g, 383 F/g, 240 F/g and 537 F/g). This outstanding performance was attributed to the excellent surface morphology of CZ3h, which is responsible for the rapid electron/ion transfer between the electrolyte and the electrode surface area. The enhanced features of the CZ3h electrode highlight potential applications in high performance supercapacitors, solar cells, photocatalysis, and electrocatalysis.

Suggested Citation

  • Yedluri Anil Kumar & Hee-Je Kim, 2018. "Effect of Time on a Hierarchical Corn Skeleton-Like Composite of CoO@ZnO as Capacitive Electrode Material for High Specific Performance Supercapacitors," Energies, MDPI, vol. 11(12), pages 1-16, November.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:12:p:3285-:d:185382
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    1. Xu, Le & Zhao, Yan & Lian, Jiabiao & Xu, Yuanguo & Bao, Jian & Qiu, Jingxia & Xu, Li & Xu, Hui & Hua, Mingqing & Li, Huaming, 2017. "Morphology controlled preparation of ZnCo2O4 nanostructures for asymmetric supercapacitor with ultrahigh energy density," Energy, Elsevier, vol. 123(C), pages 296-304.
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    Cited by:

    1. Zhangyang Kang & Wu Zhou & Kaijie Qiu & Chaojie Wang & Zhaolong Qin & Bingyang Zhang & Qiongqiong Yao, 2023. "Numerical Simulation of an Indirect Contact Mobilized Thermal Energy Storage Container with Different Tube Bundle Layout and Fin Structure," Sustainability, MDPI, vol. 15(6), pages 1-13, March.
    2. Xin Zhang & Shi Liu & Yuqi Zhao & Haicun Yang & Jinchun Li, 2023. "Honeycomb-like Hierarchical Porous Carbon from Lignosulphonate by Enzymatic Hydrolysis and Alkali Activation for High-Performance Supercapacitors," Energies, MDPI, vol. 16(9), pages 1-17, April.
    3. Anil Kumar Yedluri & Tarugu Anitha & Hee-Je Kim, 2019. "Fabrication of Hierarchical NiMoO 4 /NiMoO 4 Nanoflowers on Highly Conductive Flexible Nickel Foam Substrate as a Capacitive Electrode Material for Supercapacitors with Enhanced Electrochemical Perfor," Energies, MDPI, vol. 12(6), pages 1-11, March.
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    5. Zhangyang Kang & Rufei Tan & Wu Zhou & Zhaolong Qin & Sen Liu, 2023. "Numerical Simulation and Optimization of a Phase-Change Energy Storage Box in a Modular Mobile Thermal Energy Supply System," Sustainability, MDPI, vol. 15(18), pages 1-19, September.
    6. Cong Zhang & Qun Gao & Ke Peng & Yan Jiang, 2023. "An EV Charging Guidance Strategy Based on the Hierarchical Comprehensive Evaluation Method," Energies, MDPI, vol. 16(7), pages 1-16, March.
    7. Anil Kumar Yedluri & Eswar Reddy Araveeti & Hee-Je Kim, 2019. "Facilely Synthesized NiCo 2 O 4 /NiCo 2 O 4 Nanofile Arrays Supported on Nickel Foam by a Hydrothermal Method and Their Excellent Performance for High-Rate Supercapacitance," Energies, MDPI, vol. 12(7), pages 1-11, April.
    8. Amil Daraz & Suheel Abdullah Malik & Athar Waseem & Ahmad Taher Azar & Ihsan Ul Haq & Zahid Ullah & Sheraz Aslam, 2021. "Automatic Generation Control of Multi-Source Interconnected Power System Using FOI-TD Controller," Energies, MDPI, vol. 14(18), pages 1-18, September.
    9. Vladimir Parra-Elizondo & Ana Karina Cuentas-Gallegos & Beatriz Escobar-Morales & José Martín Baas-López & Jorge Alonso Uribe-Calderón & Daniella Esperanza Pacheco-Catalán, 2019. "Electrochemical Assessment of As-Deposited Co(OH) 2 by Electrochemical Synthesis: The Effect of Synthesis Temperature on Performance," Energies, MDPI, vol. 12(22), pages 1-17, November.
    10. Wei Chen & Na Sun & Zhicheng Ma & Wenfei Liu & Haiying Dong, 2023. "A Two-Layer Optimization Strategy for Battery Energy Storage Systems to Achieve Primary Frequency Regulation of Power Grid," Energies, MDPI, vol. 16(6), pages 1-18, March.

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