Cobalt Oxide (Co₃O₄) nanoparticles were synthesized with an aid of urea by sol–gel method. The results of X-ray diffraction revealed that the formation of face-centered cubic (Fd3m) structure and the average crystallite size of the product were found to be 13.76 nm. The formation of cobalt oxide is confirmed by FT-IR analysis. The results of HR-TEM images reveal that Co₃O₄ nanoparticles were found to have within the range of 13–15 nm. At 3 M KOH, electrochemical analyses were investigated with impedance spectroscopy and an intrinsic pseudo capacitance and the results were reported. The results of Galvanostatic charge-discharge (GCD) tests revealed the capacitive properties of Co₃O₄ with the highest specific capacitance of 761.25 F g⁻¹.

溶胶-凝胶法借助尿素合成了氧化钴（Co ₃ O ₄）纳米颗粒。X射线衍射结果表明，面心立方（Fd3m）结构的形成和产物的平均微晶尺寸为13.76nm。通过FT-IR分析确认了氧化钴的形成。HR-TEM图像的结果表明，发现Co ₃ O ₄纳米粒子的范围为13-15 nm。在3 M KOH下，用阻抗谱和固有的伪电容研究了电化学分析，并报道了结果。恒电流充放电（GCD）测试的结果表明Co ₃ O ₄的电容特性最高比电容为761.25 F g ^-1。