Abstract
Pseudocapacitance materials composite is a simple and practical approach for improving the performance of supercapacitors. In this study, Bi2O3@ACF nanocomposite was synthesized from the transition metal oxide Bi2O3 in an activated Carbon Felt (ACF) substrate by microwave irradiation. Electrochemical tests of the sample at 1000 W for 120 s show that the capacitance of the Bi2O3/ACF nanocomposite was 736 F g−1 at 1 A g−1. The electrochemical performance of flexible asymmetric supercapacitors with a voltage window of 1.7 V was evaluated. The energy density was calculated, and the obtained value was 28.6 Wh kg−1 at a power density of 0.9 kW kg−1. The device shows a capacitance retention of 67 % with a stability of approximately 5000 cycles. Bi2O3/ACF nanocomposite with excellent electrochemical properties may improve the performance of supercapacitors.
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