Spray pyrolytic deposition of ruthenium incorporated cobalt oxide thin film electrodes was carried outvia methanolic route at 623 ± 2 K. Structural, morphological, optical, compositional and electrochemi-cal study was made using XRD, SAED, SEM, TEM, UV–vis, EDX, XPS and electrochemical work station.Deposited samples shows face centered cubic crystal structure for Co₃O₄ and tetragonal for RuO₂ having crystalline nature was confirmed form SAED. Mixed oxide samples having porous nano-grain morphologyand mixed microstructure as observed form SEM and TEM. Cyclic voltammogram study reveals double-pseudo-capacitive nature with optimum specific capacitance (SC) 628.33 F/g at the scan rate 1 mV/s in1 M KOH with good stability. Charge–discharge behavior was studied to calculate electric parameterssuch as specific energy (SE), specific power (SP) and columbic efficiency (η). The calculated maximumvalues are SE 19.94 W h/kg, SP 5.33 kW/kg and η 99.43%. Electrochemical impedance study was made inthe frequency range 1 mHz to 1 MHz to see the internal resistance and capacitive behavior of the optimizedsample. The randles equivalent circuit and its parameters are reported in the text.