The high energy yielding supercapattery of PANI/VO2 binary nanocomposite

Abstract

The supercapattery material that is capable of providing high energy density (E) similar to that of batteries involving Li-ion containing organic electrolytes is achieved by using an aqueous electrolyte (1 M H₂SO₄). The supercapattery material is the nanocomposite of composition PANI59.32 %: VO₂40.68 % (PV) and which is synthesized by an insitu one-step method. The PV nanocomposite exhibited a special feature of increase of energy storage with increase in number of charge/discharge cycles at 0.4 V s¹. The PV exhibited an exceptional durability and robustness up to 16790 cycles at 0.4 V s¹. At 1 A g¹, the PV furnished a specific capacity (Q) of 623.6 C g¹, an E of 103.9 W h kg¹ and a power density (P) of 1.200 kW kg¹. In addition, the PV also exhibited an remarkable tolerance to the high applied current load during charging and discharging by withstanding up to 21 A g¹ establishing its high rate capability.