تهيه نانوكامپوزيت CoFe2O4 دوپ شده با سريم و پوشش دهي با نانوصفحات موليبدن دي‌سولفيد و بررسي كاربرد آن در ابرخازن‌ها با عملكرد بالا

In this research, electrodes for application in supercapacitors were fabricated utilizing a hydrothermal method. For the first time, electrodes based on metal-doped CeₓCoFe₂₋ₓO₄ spinel (with x = 0.3 an‎d 0.5) were synthesized hydrothermally at 180 °C. These spinel structures were subsequently coated with molybdenum disulfide (MoS₂) nanosheets an‎d investigated as the active electrode material for supercapacitors. The successful formation an‎d high purity of the resulting composites were confirmed through comprehensive characterization using various instrumental techniques, including Field Emission Scanning Electron Microscopy (FE-SEM), Fourier Transform Infrared Spectroscopy (FT-IR), X-Ray Diffraction (XRD), Energy Dispersive X-ray Spectroscopy (EDX), an‎d Elemental Mapping. The characteristic ban‎ds observed in the FT-IR an‎d XRD patterns confirmed the successful synthesis an‎d high purity of the materials. The electrochemical performance of these composites was eva‎luated using Cyclic Voltammetry (CV), Galvanostatic Charge-Discharge (GCD), an‎d Electrochemical Impedance Spectroscopy (EIS). The results demonstrated that the specific capacitance of the electrodes with x = 0.3 an‎d x = 0.5 was 900.15 mF.(cm2)⁻¹ an‎d 1141.41 mF.(cm2)⁻¹, respectively, at a current density of 1.8 mA g⁻¹. Furthermore, after 6000 consecutive charge-discharge cycles at a high current density of 8 mA g⁻¹, the electrodes retained 82.3% an‎d 97.1% of their initial capacitance, respectively, indicating excellent cyclic stability.

فاطمه داور

عليرضا علافچيان , مريم كرباسي

كاظم كرمي , محمدمحسن مومني هامانه