Graphene (G) and ternary nanocomposites of Mn₃O₄, TiO₂, and reduced graphene oxide(rGO) electrodes have been prepared for supercapacitor applications. The as-synthesized samples were characterized using several techniques including XRD, SEM, TEM, XPS, and Raman spectroscopy. Electrochemical characterizations were studied via cyclic voltammetry (CV), galvanostatic charge–discharge (GCD), and electrochemical impedance spectroscopy (EIS). XRD patterns of TiO₂ and Mn₃O₄ showed the formation of anatase and hausmannite tetragonal nanoparticles, respectively, whereas rGO and G showed an amorphous structure. The TEM analysis showed spherical shaped particles with less than 50 nm sizes for Mn₃O₄, nanotube for TiO₂, fiber structure for rGO, and layered structure for graphene. The Mn₃O₄/TiO₂/rGO ternary nanocomposite electrode presented a much higher specific capacitance than its single individual constituents. The ternary nanocomposite has a specific capacitance of 356 F g⁻¹ in 6 M KOH aqueous electrolyte and respectable cycling performance, with 91% capacitance retained over 3000 cycles referring to its suitability for supercapacitor applications. An asymmetric supercapacitor (ASC) was constructed using a Mn₃O₄–TiO₂–rGO (MTrGO) as a positive electrode and G as a negative electrode. The organized (ASC) works steadily under the potential window of 0–1.8 V and provides a high-energy density of 31.95 Wh kg⁻¹ at a power density of 7188 W kg⁻¹ complemented by satisfactory cycle stability with 87% capacitance retention over 1000 cycles.

已经为超级电容器应用制备了石墨烯（G）和Mn ₃ O ₄，TiO ₂和还原型石墨烯氧化物（rGO）电极的三元纳米复合材料。使用多种技术对合成后的样品进行表征，包括XRD，SEM，TEM，XPS和拉曼光谱。通过循环伏安法（CV），恒电流充放电（GCD）和电化学阻抗谱（EIS）研究了电化学特性。TiO ₂和Mn ₃ O _4的X射线衍射图分别显示了锐钛矿和方锰矿四方纳米颗粒的形成，而rGO和G显示出无定形结构。TEM分析显示出Mn ₃ O ₄小于50 nm ，TiO ₂纳米管，rGO的纤维结构和石墨烯的层状结构的球形颗粒。Mn ₃ O ₄ / TiO ₂ / rGO三元纳米复合电极比其单个单个成分具有更高的比电容。三元纳米复合材料的比电容为356 F g ^-1在6 M KOH水性电解液中具有出色的循环性能，在3000次循环中保留91％的电容，这表明它适用于超级电容器应用。使用Mn ₃ O ₄ -TiO ₂ -rGO（MTrGO）作为正电极和G作为负电极来构造不对称超级电容器（ASC）。有组织的（ASC）在0–1.8 V的电势窗口下稳定工作，并在7188 W kg ^-1的功率密度下提供31.95 Wh kg ^-1的高能量密度，并具有令人满意的循环稳定性和超过87％的电容保持率1000个周期。