Abstract
A PbO2/AC asymmetric electrochemical capacitor (AEC) with energy density as high as 49.4 Wh kg−1, power density of 433.2 W kg−1 and specific capacitance of 135.2 F g−1 was fabricated with PbO2 electrodeposited on three-dimensional porous titanium (3D-Ti/PbO2) and activated carbon. The high electrochemical active surface of 3D-Ti/PbO2 resulted in high specific capacity making it suitable for use as positive electrode in PbO2/AC AEC. The fabricated AEC demonstrated good power performance with an energy density conservation of 30 Wh kg−1 at power density of 2078 W kg−1. The fabricated AEC also showed excellent cycling stability with capacitance retention of 99.2% after 1000 cycles.
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