The synthesis and characterization of graphene-based cobalt ferrite nanocomposite materials and its electrochemical properties

Abstract

Cobalt ferrite/graphene nanocomposite materials were prepared by a one-pot hydrothermal method. Graphene oxide (GO) was synthesized by a modified Hummers method. The surface morphologies and structures of CoFe 2 O 4 /graphene nanocomposite materials were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), thermogravimetric analyzer (TGA), and fourier transform infrared spectroscopy (FTIR). SEM and TEM investigations unveiled that graphene sheets were uniformly well decorated by spherical cobalt ferrite nanoparticles (~ 3-6 nm). Electrochemical studies on CoFe 2 O 4 /graphene nanocomposite revealed the decline in the charge transfer resistance (~ 27 Ω), while on the other hand, higher corrosion current density (0.3837) and corrosion rates (0.00446) were observed. Cyclic voltammograms (CV) outcomes confirmed supercapacitor performance. The poor corrosion performance of the nanocomposite materials could be attributed to its higher conductivity.

Corrosion in Supercapacitors- An Overview

“…The poor corrosion stability of a nanocomposite cobalt ferrite/graphene was attributed to its high electronic conductivity [82,83]. Insufficient stability of many redox-active materials potentially of interest for application in supercapacitor electrodes in contact with acidic electrolyte solutions has been noticed [84].…”

Impact of pulping routes of rice straw on cellulose nanoarchitectonics and their behavior toward Indigo dye

“…The production of nanocelluloses is considered to be an advanced topic in the scientific and industrial societies, due to its biodegradability and availability. This type of nanomaterials leads to developing biopolymers and other composites, via improving their mechanical properties and increasing the field of applications (e.g., medical, optical, water purification, Flexible energy and electronic devices (Rusmirovic et al 2017;Han et al 2019;Lotfy and Basta 2020;Basta et al 2017aBasta et al , b, 2020Basta and Lotfy 2021;Basta et al 2021Basta et al , 2022Shu and Tang 2020;Yu et al 2022a, b;Zeng et al 2020a, b;Alavijeh et al 2021;Alruwashid et al 2021;Danish et al 2021;Kwon et al 2022;Vaikundam et al 2022).…”