Supercapacitor performances of RuO2/MWCNT, RuO2/Fullerene nanocomposites

다국어 초록 (Multilingual Abstract)

In this study, RuO2/Fullerene and RuO2/MWCNT nanocomposites were synthesized to use as an electroactive materials in symmetric supercapacitor device performances. The materials were examined via Fourier transform infrared spectroscopy‐attenuated total reflectance (FTIR‐ATR), thermo‐gravimetric analysis (TGA‐DTA), scanning electron microscopy‐energy dispersive X‐ray analysis (SEM‐EDX), cyclic voltammetry (CV), galvanostatic charge/discharge (GCD) and electrochemical impedance spectroscopy (EIS). The RuO2/MWCNT and RuO2/Fullerene nanocomposite electrodes show good electrochemical performances. For instance, the highest specific capacitance of RuO2/Fullerene and RuO2/MWCNT electrodes reaches Csp = 3895.11 and 1662.19 F/g at 1 mV/s within the potential range of 0.8 V in 1 M H2SO4 solution. RuO2/MWCNT and RuO2/Fullerene nanocomposites have good cycle stability ~100% specific capacitance at [RuO2]o/[MWCNT]o = 1:1; 2:1 and [RuO2]o/[Fullerene]o = 2:1, respectively. The different equivalent circuit models of LR1Q(C1R2) and LR1(Q1R2)(Q2R3) were used to interpret EIS data.