Faradaic supercapattery of rGO/PANI/CuO/ SnO2 nanocomposite and its application in DC-DC switched capacitor convertors

Abstract

Manifestation of high energy density (E) by a supercapattery which is proficient in delivering high power density (P) is the most desirable feature and which is achieved from the nanocomposite of rGO12 %: PANI48 %: CuO32 %: SnO₂8 %, (GPC32S8) synthesized in an easy in situ one step chemical method. The GPC32S8, one among the four composites synthesized in the series. The GPC32S8 involves the integration of mixed metal oxides with PANI as a source of E. The GPC32S8 supercapattery device exhibited a high specific capacity of 111.9 C g¹, an E of 18.65 W h kg¹ and a P of 0.3000 kW kg¹ at 0.5 A g¹. The obtained E, is comparable with the vanadium redox flow batteries in terms of E. The GPC32S8 retains 58 % of its initial Q up to 3000 cycles at 0.4 V s¹. The GPC32S8 exhibits a power back up of 10 mins on charging for 2 mins at high current rate using 9 V commercial EW high power 6F22 battery. The real time application of GPC32S8 in DC-DC switched capacitor convertor (SCC) is successfully demonstrated.