<p>In the current study, yttrium-doped manganese cobalt spinel ferrite (Y_xMn_0.5Co_0.5Fe_2-xO₄ (<i>x</i> = 0.00, 0.01, 0.02) electrode nanomaterials were used as supercapacitors. Y_xMn_0.5Co_0.5Fe_2-xO₄ was synthesized using the sol-gel auto-combustion technique. Various characterization techniques were employed, including X-ray diffraction, field emission scanning electron microscopy, vibrating sample magnetometry, cyclic voltammetry, galvanic charge-discharge (GCD), and electrochemical impedance analysis (EIS). The structural properties of Y_xMn_0.5Co_0.5Fe_2-xO₄ (<i>x</i> = 0.00, 0.01, 0.02) were examined using XRD, with all values of x yielding single-phase spinel ferrites within the Fd-3m space group. The FESEM average particle size was in the range 440–560 nm. Magnetic studies reveal that the synthesized ferrite is soft in nature, with saturation magnetization of 40.84 emu/g (<i>x</i> = 0.00), 63.56 emu/g (<i>x</i> = 0.01) and 64.39 emu/g (<i>x</i> = 0.02). Electrochemical studies of Y_xMn_0.5Co_0.5Fe_2-xO₄ (<i>x</i> = 0.00, 0.01, 0.02) electrodes were examined using CV, GCD, and EIS in a 3 M KOH electrolyte solution, revealing higher C_sp in the range of 185.6–384.2Fg⁻¹ at 10mVs⁻¹. The fabricated Y_0.02Mn_0.5Co_0.5Fe_1.98O₄ electrode is a promising contender for supercapacitor applications.</p> Graphical Abstract <p></p>