Novel MnO₂-CuO-BaO (MCB) spherical nanocomposite was synthesized by facile hydrothermal method at 80 °C from aqueous solutions. The sample was primarily characterized by Powder X-ray Diffraction, Scanning Electron Microscopy and Dynamic Light scattering measurements. XRD showed the existence of MnO₂, CuO and BaO in crystalline form with average crystallite size 16 nm. SEM and DLS studies demonstrated a wide particle size distribution. Cyclic voltammetry (CV) and electrochemical impedance (EIS) measurements were recorded to examine the electrochemical characteristics. CV profile revealed a pseudocapacitance behavior of the nanocomposite. A noticeably high specific capacitance of 198 F/g was established at a scan rate of 10 mV/sec in aqueous 1 M KOH electrolyte. This strongly suggested Mn-Cu-Ba mixed metal oxide nanocomposite as a promising electrode material in supercapacitor technology.

新型MnO ₂ -CuO-BaO (MCB) 球形纳米复合材料是通过简便的水热法在80 °C 下从水溶液中合成的。样品的主要特征是粉末 X 射线衍射、扫描电子显微镜和动态光散射测量。XRD表明存在MnO ₂, CuO 和 BaO 以结晶形式存在，平均晶粒尺寸为 16 nm。SEM 和 DLS 研究证明了广泛的粒度分布。记录循环伏安法 (CV) 和电化学阻抗 (EIS) 测量值以检查电化学特性。CV 曲线揭示了纳米复合材料的赝电容行为。在 1 M KOH 水溶液中以 10 mV/sec 的扫描速率建立了 198 F/g 的显着高比电容。这强烈表明 Mn-Cu-Ba 混合金属氧化物纳米复合材料是超级电容器技术中一种很有前途的电极材料。