Electrochemical Synthesis of Core-Shell CoFe LDH@NiFeS Structure on Nickel Foam an‎d Its Application as a Supercapacitor Electrode

10/22/2026 12:00:00 AM

The growth of portable electronic devices an‎d increasing fossil fuel consumption have highlighted the need for cleaner, more affordable energy sources. In this context, electrochemical supercapacitors are regarded as a promising option for energy storage. In this study, the nucleus-shell structure of CoFe LDH@NiFeS on a nickel foam substrate (NF) was eva‎luated using electrochemical synthesis methods an‎d tested for supercapacitor performance. First, the Nifes layer was prepared by a constant current method at a current density of 40 mA/Cm2 , followed by the deposition of the CoFe LDH layer by a constant potential method at -0.1 V. The final structure was examined with field emission scanning electron microscopy (FE-SEM), elemental analysis (EDS), infrared spectroscopy (ATR-FTIR), an‎d X-ray diffraction (XRD). Electrochemical properties were assessed through cyclic voltammetry (CV), constant current charge-discharge (GCD), an‎d electrochemical impedance spectroscopy (EIS) in a 6M NaOH solution. The electrode achieved a specific capacitance of 2981/8 F/g at a current density of 1 A/g. This high performance is primarily due to the elevated specific surface area an‎d the increased number of active sites for electrochemical storage.

ابرخازن , رسوب دهي الكتروشيميايي , هيدروكسيد دوگانه لايه‌اي , كامپوزيت نانوساختار , كالكوژنايد

Supercapacitor , Electrodeposition , Nanostructured Composite , Layered Double Hydroxide , Chalcogenide

Fatemeh Akhavanfar

Ali Ghaffarinejad