<p>Supercapacitors (SCs) play an important role in fulfilling the rising energy demands. It is necessary to design such electrode materials which have strong electrocapacitive nature in order to increase the performance of metal oxide-based SCs. Recently, a large number of articles have been published for the synthesis of electrode materials for SCs. Ternary metal oxide (TMOs) possess multiple oxidation states and higher super capacitive performance than single component metal oxides. This study presents pure and Mo-doped MnV₂O₄ ternary metal oxides synthesized by employing hydrothermal method. The synthesized materials were used for assembling symmetric SC device. The MnV₂O₄ and MnV_0.98Mo_0.02O₂ delivers a good specific capacitance of 497.27 Fg⁻¹ and 573.21 Fg⁻¹ at 5 mVs⁻¹, respectively. The fabricated device possesses a high energy density of 24.86 Wh kg⁻¹ at a power density of 341.63 Wkg⁻¹ for MnV₂O₄ and 28.66 Whkg⁻¹ at a power density 318.45 Wkg⁻¹ for MnV_0.98Mo_0.02O₂ sample. Both the samples possess high BET surface area of 67.51 and 87.76 m²/g. Moreover, the fabricated device exhibit excellent cyclic stability of 92.6% for pure sample and 96.1% for Mo doped sample at 5 Ag⁻¹ after 5000 cycles. This study represents a next-generation electrode material for high energy storage devices as the developed material demonstrates promising SCs properties.</p>