Supercapacitor Performance of Fe3O4 and Fe3O4@SiO2-bis(aminopyridine)-Cu Hybrid Nanocomposite
Mohammed Ahmed Mustafa, Qutaiba A. Qasim, Ahmed B. Mahdi, Samar Emad Izzat, Yasir S. Alnassar, Emad Salaam Abood, Zahara Jalil alhakim, Zaid H. Mahmoud, Ahmed Mahdi Rheima, H. N. K. AL-Salman
Abstract
In this study, photolysis and immobilization of bis(aminopyridine)-Cu on the surface of SiO 2 -coated Fe 3 O 4 nanoparticles were used to create core-shell composites of magnetite (Fe 3 O 4 ) and Fe 3 O 4 @SiO2-bis(aminopyridine)-Cu. FTIR, ICP-AES, XRD, XPS, FESEM-EDS-mapping, and TEM were used to identify the structural characteristics of the catalyst. TGA was used to test the prepared materials' thermal stability, and CV, GCD, and EIS were used to assess their electrochemical characteristics. The successful shelling of SiO 2 around Fe 3 O 4 with a size of 20 nm was confirmed by the TEM images. The results of the electrochemical tests demonstrate that the performance of the synthetic materials is typical for supercapacitors. The shell of SiO 2 -bis(aminopyridine)-Cu can boost Fe 3 O 4 's reversibility and storage energy. After 1000 cycles at 5 A/g, the Fe 3 O 4 . The Fe 3 O 4 @SiO 2 -bis(aminopyridine)-Cu electrode exhibits good specific capacitance of 265 F/g and excellent cyclic stability with a retention ratio of 85% compared to pure magnetite's 67 percent.