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.
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