Browsing by Author "Ramesh, T.P."

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    Energy density comparable with Li-ion batteries from aqueous supercapatteries of PANI/V2O5/SnO2 nanocomposite and its green electrolytes
    (Elsevier B.V., 2025) Viswanathan, A.; Ramesh, T.P.; Naik, M.; Nityananda Shetty, A.N.
    The PANI53.85 %: V2O534.62 %: SnO211.53 % (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 H2SO4. 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. © 2025 The Authors
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    Exploring the potential of CoAl2O4 nanoflakes in supercapacitor applications
    (Elsevier B.V., 2025) Ramesh, T.P.; Shenoy, U.S.; Bhat, D.K.
    Spinel structured nanoparticles with binary and ternary metal oxide combinations have recently been identified as a viable material for use in supercapacitors. Two mixed-valence metal cations provide easy electron transport between various metal cations. High-performance CoAl2O4 spinel nanoflakes were synthesized using a mixed-solvent solvothermal method, followed by calcination. First principles calculations revealed high density of states near the Fermi level indicating its potential for supercapacitor applications. These nanostructured materials were then experimentally explored as promising electrode candidates for supercapacitor applications, using a 2 M KOH aqueous electrolyte. The results were impressive: the material demonstrated a high specific capacitance of 851.9 F/g at a current density of 1 A/g and the fabricated supercapacitor exhibited a power density of 14940.0 W/kg at a current density of 12 A/g. Even under more demanding conditions, the electrode maintained strong durability, in terms of cyclic stability along with high energy and power density values making it a strong contender for next-generation energy storage devices. © 2025 Elsevier B.V.