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Design of high-performance supercapacitor based on MoS2/ZnCo2O4 composite nanoelectrode

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Abstract

Unique nanostructures can provide better electrochemical performance for supercapacitors. The unique network structure is formed by coating MoS2 nanospheres on ZnCo2O4 nanosheets, which has good synergistic effect. In this paper, the MoS2/ZnCo2O4 heterostructures were prepared by two-step hydrothermal method. MoS2/ZnCo2O4 was verified by XRD test, and the microstructure of MoS2/ZnCo2O4 was studied by scanning electron microscopy and transmission electron microscopy. Electrochemical tests show that the heterostructure has a larger specific surface area and more electroactive centers than single ZnCo2O4 or MoS2 nanospheres. Using 1 M KOH as electrolyte, the maximum specific capacitance of the heterostructure nanocomposite electrode is 2705.2 F/g at a current density of 15 A/g. After 2000 cycles at a current density 50 A/g, the initial capacitance remains at 88.2%. A symmetric supercapacitor device with MoS2/ZnCo2O4 as positive and negative electrodes was assembled, which has good electrochemical performance, high capacity of 147 C/g, and good cycling stability of 90.3%.

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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 (no. 135409423) and 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

    Fengjuan Miao, Wanghui Peng & Bairui Tao

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

    Yu Zang

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  1. Fengjuan Miao
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  2. Wanghui Peng
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  3. Bairui Tao
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  4. Yu Zang
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Correspondence to Fengjuan Miao or Bairui Tao.

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Wanghui Peng and Fengjuan Miao are co-first authors.

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Miao, F., Peng, W., Tao, B. et al. Design of high-performance supercapacitor based on MoS2/ZnCo2O4 composite nanoelectrode. Ionics 27, 4037–4045 (2021). https://doi.org/10.1007/s11581-021-04175-x

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