Sethi, M.Bhat, D.K.2026-02-052019Journal of Alloys and Compounds, 2019, 781, , pp. 1013-10209258388https://doi.org/10.1016/j.jallcom.2018.12.143https://idr.nitk.ac.in/handle/123456789/24597NiCo<inf>2</inf>O<inf>4</inf> nanorod arrays were synthesized employing a facile low-temperature solvothermal approach, followed by post-calcination treatment. The structural, morphological and elemental characterizations were done by diffraction, microscopic and spectroscopic techniques. The prepared sample was studied as an active electrode material for supercapacitor application in 2 M KOH aqueous electrolyte. The cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectral (EIS) studies were carried out to know the electrochemical activity of the prepared material. From the CV study, a high capacitance value of 440 F g?1 was obtained at a scan rate of 5 mV s?1 in a 3-electrode method. Apart from high capacitance value, the prepared electrode depicted 94% initial capacitance retention value after 2000 charge-discharge cycles at a current density of 8 A g?1. The fabricated symmetrical supercapacitor depicted a high energy density of 12.6 Wh kg?1 and a high power density of 4003 W kg?1. This was attributed to the better electrical conductivity of NiCo<inf>2</inf>O<inf>4</inf> nanorods. © 2018 Elsevier B.V.CapacitanceCobalt compoundsCyclic voltammetryElectric dischargesElectrochemical electrodesElectrolytesNanorodsPotassium hydroxideSupercapacitorTemperatureActive electrode materialsElectrochemical activitiesElectrochemical studiesEnergy densityGalvanostatic charge dischargesNiCo2O4Power densitiesSupercapacitor applicationNickel compounds