Electric double-layer capacitors with tea waste derived activated carbon electrodes and plastic crystal based flexible gel polymer electrolytes

6th Asian Physics Symposium

Suleman, M.^1 ; Deraman, M.^1 ; Othman, M.A.R.^1 ; Omar, R.^1 ; Hashim, M.A.^2 ; Basri, N.H.^1 ; Nor, N.S.M.^1 ; Dolah, B.N.M.^1 ; Hanappi, M.F.Y.M.^1 ; Hamdan, E.^1 ; Sazali, N.E.S.^1 ; Tajuddin, N.S.M.^1 ; Jasni, M.R.M.^1

School of Applied Physics, Faculty of Science and Technology, National University of Malaysia, Bangi, Selangor

43600, Malaysia^1

Faculty of Science and Technology, Universiti Sains Islam Malaysia, Bandar Baru Nilai, Negeri Sembilan, Nilai

71800, Malaysia^2

关键词: Activated carbon electrode;    Activated carbon powder;    Electrochemical stabilities;    Galvanostatic charge discharges;    Gel polymer electrolytes;    Specific capacitance;    Specific surface area (SSA);    Supercapacitor electrodes;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/739/1/012086/pdf
DOI  :  10.1088/1742-6596/739/1/012086

来源: IOP

【 摘 要 】

We report a novel configuration of symmetrical electric double-layer capacitors (EDLCs) comprising a plastic crystalline succinonitrile (SN) based flexible polymer gel electrolyte, incorporated with sodium trifluoromethane sulfonate (NaTf) immobilised in a host polymer poly (vinylidine fluoride-co-hexafluoropropylene) (PVdF-HFP). The cost-effective activated carbon powder possessing a specific surface area (SSA) of ∼ 1700 m2g-1containing a large proportion of meso-porosity has been derived from tea waste to use as supercapacitor electrodes. The high ionic conductivity (∼3.6×10-3S cm-1at room temperature) and good electrochemical stability render the gel polymer electrolyte film a suitable candidate for the fabrication of EDLCs. The performance of the EDLCs has been tested by electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and galvanostatic charge-discharge studies. The performance of the EDLC cell is found to be promising in terms of high values of specific capacitance (∼270 F g-1), specific energy (∼ 36 Wh kg-1), and power density (∼ 33 kW kg-1).