Energy density comparable with Li-ion batteries from aqueous supercapatteries of PANI/V2O5/SnO2 nanocomposite and its green electrolytes

The PANI53.85 %: V 2 O 5 34.62 %: SnO 2 11.53 % (PVS) ternary nanocomposite synthesized by insitu synthesis as supercapattery electrode material has exhibited energy density ( E ) equivalent to that of Li-ion batteries as the PVS furnishes an impressive E of 114.13 W h kg 1 with a high power density ( P ) of 2.400 kW kg 1 at 2 A g 1 in real 2 EL-supercapattery cell set up with low potential window (1.2 V) provided by 1 M H 2 SO 4 . The energy storage performance resulted by PVS is, a specific capacity ( Q ) of 684.8 C g 1 , at 2 A g 1 . The PVS is robust to withstand its energy storage characters up to 13600 cycles at 0.4 V s 1 . The Li-ion supercapattery device of PVS made with a green electrolyte exhibited a Q of 672.0 C g 1 , E of 112.0 W h kg 1 and P of 1.200 kW kg 1 at 1 A g 1 . • The PANI53.85 %: V 2 O 5 34.62 %: SnO 2 11.53 % (PVS) furnished an E equivalent to E of Li-ion batteries. • PVS produces an E of 114.13 W h kg 1 with a high P of 2.400 kW kg 1 at 2 A g 1. • The Li-ion supercapattery of PVS with a green electrolyte produced an E of 112 W h kg 1 at 1 A g 1. • All these high energy storages are obtained in 2 EL-supercapattery cell set up with 1 M H 2 SO 4 (1.2 V).