A novel facile process for fabrication of amorphous MnO2/bamboo charcoal monolith hybrids (MnO2/BC) for potential supercapacitor applications using γ-irradiation methods is described. The structural, morphological and electrochemical properties of the MnO2/BC hybrids have been investigated using X-ray
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A novel facile process for fabrication of amorphous MnO2
/bamboo charcoal monolith hybrids (MnO2
/BC) for potential supercapacitor applications using γ-irradiation methods is described. The structural, morphological and electrochemical properties of the MnO2
/BC hybrids have been investigated using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), cyclic voltammetry (CV), galvanostatic charge/discharge (GCD) and electrochemical impedance spectroscopy (EIS) techniques. The combination of BC (electrical double layer charge) and MnO2
(pseudocapacitance) created a complementary effect, which enhanced the specific capacitance and good cyclic stability of the MnO2
/BC hybrid electrodes. The MnO2
/BC hybrids showed a higher specific capacitance (449 F g−1
at the constant current density of 0.5 A g−1
over the potential range from –0.2 V to 0.8 V), compared with BC (101 F g−1
) in 1 M of Na2
aqueous electrolyte. Furthermore, the MnO2
/BC hybrid electrodes showed superior cycling stability with 78% capacitance retention, even after 10,000 cycles. The experimental results demonstrated that the high performance of MnO2
/BC hybrids could be a potential electrode material for supercapacitors.