Abstract In this study, we investigated that the activated carbon (AC)-based supercapacitor and introduced SIFSIX-3-Ni as a porous conducting additive to increase its electrochemical performances of AC/SIFSIX-3-Ni composite-based supercapacitor. The AC/SIFSIX-3-Ni composites are coated onto the aluminum substrate using the doctor blade method and conducted an ion-gel electrolyte to produce a symmetrical supercapacitor. The electrochemical properties of the AC/SIFSIX-3-Ni composite-based supercapacitor are evaluated through cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and galvanostatic charge/discharge tests (GCD). The AC/SIFSIX-3-Ni composite-based supercapacitor showed reasonable capacitive behavior in various electrochemical measurements, including CV, EIS, and GCD. The highest specific capacitance of the AC/SIFSIX-3-Ni composite-based supercapacitor was 129 F g−1 at 20 mV s−1.

    Abstract
    1 Introduction
    2 Experimental
        2.1 Materials
        2.2 Synthesis of SIFSIX-3-Ni metal–organic framework
        2.3 Preparation of ion-gel electrolyte
        2.4 Fabrication of ACSIFSIX-3-Ni composite slurry
        2.5 Fabrication of ACSIFSIX-3-Ni electrodes
        2.6 Preparation of ACSIFSIX-3-Ni composite-based supercapacitor
    3 Characterization
        3.1 XRD
        3.2 FT-IR
        3.3 SEM
        3.4 Cyclic voltammetry
    4 Results and discussion
        4.1 Physical properties of the SIFSIX-3-Ni
        4.2 Electrochemical properties of the SIFSIX-3-Ni-based supercapacitor
    5 Conclusion
    Acknowledgements 
    References

• Kyu Seok Lee(Division of Energy and Environmental Engineering, Daejin University)
• Ye Ji Seo(Division of Energy and Environmental Engineering, Daejin University)
• Hyeon Taek Jeong(Division of Energy and Environmental Engineering, Daejin University)