کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5497554 | 1531902 | 2017 | 9 صفحه PDF | دانلود رایگان |
- Synthesis of MTTMF nanocomposites via a facile sol-gel method.
- XRD confirms the spinel ferrite peak in the synthesised nanomaterials SEM micrographs demonstrate a highly porous structure.
- A supercapacitive performance of 221 Fgâ1 is achieved with CuCoF.
Nanocrystallites of three mixed ternary transition metal ferrite (MTTMF) were prepared by a facile sol-gel method and adopted as electrode material for supercapacitors. The phase development of the samples was determined using Fourier transform infrared (FT-IR) and thermal gravimetric analysis (TG). X-ray diffraction (XRD) analysis revealed the formation of a single-phase spinel ferrite in CuCoFe2O4 (CuCoF), NiCoFe2O4 (NiCoF) and NiCuFe2O4 (NiCuF). The surface characteristics and elemental composition of the nanocomposites have been studied by means of field emission scanning electron microscopy (FESEM), as well as energy dispersive spectroscopy (EDS). The electrochemical performance of the nanomaterials was evaluated using a two-electrode configuration by cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic technique in 1Â M KOH electrolyte and was found to be in the order of: CuCoFÂ >Â NiCoFÂ >Â NiCuF. A maximum specific capacitance of 221Â Fgâ1 was obtained with CuCoF at a scan rate of 5Â mVÂ sâ1. In addition to an excellent cycling stability, an energy density of 7.9Â kWÂ kgâ1 was obtained at a current density of 1Â Agâ1. The high electrochemical performance of the MTTMF nanocomposites obtained indicates that these materials are promising electrodes for supercapacitors.
Journal: Results in Physics - Volume 7, 2017, Pages 345-353