محمدمهدي شكربيگي

Using a thermal solvent process, thin films of cobalt-based metal-organic framework an‎d zincdoped cobalt-based metal-organic framework were grown directly on copper foam, designated CM/CF an‎d ZCM/CF, respectively. Their electrochemical performance for supercapacitor applications was investigated. The findings from electrochemical experiments showed that doping with 5 mol% zinc positively enhances the electrochemical activity of ZIF-67. Energy dispersive X-ray spectroscopy (EDS) confirmed the successful zinc doping. Field emission scanning electron microscopy (FESEM) imaging showed that the crystal size decreased with the addition of zinc salt. Dunnʹs computational model showed that the ion diffusion rate increased with the decrease in crystal size. The ZCM/CF electrode exhibited an excellent surface capacitance of 635.7 mF/cm2 at a current density of 3 mA/cm2 an‎d retained 85% of its performance after 4000 charge-discharge cycles. Electrochemical impedance spectroscopy (EIS) showed that the charge transfer resistance in the ZCM/CF electrode was lower, indicating the positive effect of zinc doping on the electrode conductivity. In addition, the ZCM/CF electrode exhibited an energy density of 22 μ W h/cm2 an‎d a power density of 0.74 m W/cm2

چارچوب فلز -آلي , فوم مس , فعاليت الكتروشيميايي , ابر خازن

Metal-organic framework , Copper foam , Electrochemical activity , Supercapacitor

Mohammadmahdi Shekarbeigi

Vahid Safarifard