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Core shell structure CoMoO4@CuCo2O4 hybrids as advanced electrode materials for high-performance asymmetric supercapacitors

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Abstract

CoMoO4 microspheres were deposited on nickel (Ni) foam by simple hydrothermal method, and CuCo2O4 nanowires were uniformly grown on CoMoO4 microspheres, then CoMoO4@CuCo2O4 core shell structure composite material was successfully synthesized. The electrochemical test of CoMoO4@CuCo2O4 electrode was completed by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and galvanostatic charge–discharge (GCD). These experiment results exhibit that CoMoO4@CuCo2O4 electrode has excellent capacitance characteristic, including a remarkable specific capacitance of 2639 F g−1 at 1 A g−1 and an outstanding cycle life with a captaincy retention of 91.6% after 2000 cycles at 30 A g−1. Furthermore, an asymmetric supercapacitor (ASC) based on CoMoO4@CuCo2O4//activated carbon (AC) exhibited a high energy density of 51.2 W h kg−1 at 800.3 W kg−1. These performances strongly demonstrate that the CoMoO4@CuCo2O4 electrode synthesized by simple methods is an excellent electrode material in the application of supercapacitors (SCs).

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Acknowledgements

We would like to thank the Engineering Research Center of Agricultural Multi-Dimensional Sensor Information Perception, Heilongjiang Province, and Heilongjiang Provincial Key Laboratory of Micro-Nano Sensor Component. This work was jointly supported by the Fundamental Research Funds in Heilongjiang Provincial Universities (Nos. 135109244, 135309115, 135309211, and 135409104), Heilongjiang Science Foundation Project (JQ2019F003 and ZD2019F004).

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Authors and Affiliations

  1. College of Communications and Electronics Engineering, Qiqihar University, Heilongjiang, 161006, China

    Bairui Tao, Jingli Li & Fengjuan Miao

  2. College of Materials Science and Engineering, Qiqihar University, Wenhua Street 42, Qiqihar, China

    Yu Zang

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  1. Bairui Tao
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  2. Jingli Li
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  3. Fengjuan Miao
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  4. Yu Zang
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Correspondence to Bairui Tao or Fengjuan Miao.

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Tao, B., Li, J., Miao, F. et al. Core shell structure CoMoO4@CuCo2O4 hybrids as advanced electrode materials for high-performance asymmetric supercapacitors. Ionics 27, 3627–3637 (2021). https://doi.org/10.1007/s11581-021-04129-3

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