Mixed transition metal oxides have attracted great attention in supercapacitors applications due to their better electrochemical performance than their single oxides. In this work, iron cobaltite (FeCo₂O₄) and its single metal oxides i.e. iron oxide (Fe₂O₃) and cobalt oxide (Co₃O₄) were synthesized by a simple hydrothermal process. The structural, spectroscopic and morphological properties were studied using X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy and field-emission scanning electron microscope (FESEM). XRD and FTIR results show the composition of the products. The obtained iron oxide was α-Fe₂O₃. FESEM images show that FeCo₂O₄ and its single metal oxides exhibit different morphology even though they were synthesized via similar method. The electrochemical properties of the α-Fe₂O₃, Co₃O₄ and FeCo₂O₄ electrodes were examined by cyclic voltammetry (CV), galvanostatic charge/discharge (GCD) and electrochemical impedance spectroscopy (EIS) in a 6 M KOH electrolyte solution. At comparable current density, the FeCo₂O₄ electrode has the highest specific capacitance (C_sp), followed by Co₃O₄ and α-Fe₂O₃. An asymmetric FeCo₂O₄/KOH/GO supercapacitor was fabricated. The supercapacitor exhibits maximum energy density of 14.5 Wh kg⁻¹ and maximum power density of 2177 W kg⁻¹. It demonstrates 60% rate capability after 1000 continuous charge-discharge cycles at 1 A g⁻¹.

混合过渡金属氧化物因其比单氧化物更好的电化学性能而在超级电容器应用中引起了极大的关注。在这项工作中，通过简单的水热法合成了钴酸铁（FeCo ₂ O ₄）及其单一金属氧化物，即氧化铁（Fe ₂ O ₃）和氧化钴（Co ₃ O ₄）。使用X射线衍射（XRD），傅立叶变换红外（FTIR）光谱和场发射扫描电子显微镜（FESEM）研究了结构，光谱和形态学性质。XRD和FTIR结果表明了产品的成分。得到的铁氧化物为α -Fe ₂ ö₃。FESEM图像显示，即使通过类似方法合成了FeCo ₂ O ₄及其单一金属氧化物，其形态也不同。在6 M KOH中，通过循环伏安法（CV），恒流充电/放电（GCD）和电化学阻抗谱（EIS）检查α -Fe ₂ O ₃，Co ₃ O ₄和FeCo ₂ O ₄电极的电化学性质。电解液。在相当的电流密度下，FeCo ₂ O ₄电极具有最高的比电容（C _sp），其次是Co ₃O ₄和α -Fe ₂ O ₃。制备了不对称的FeCo ₂ O ₄ / KOH / GO超级电容器。超级电容器的最大能量密度为14.5 Wh kg ^-1，最大功率密度为2177 W kg ^-1。它显示了在1 A g ^-1下进行1000次连续充放电循环后的60％额定容量。