The Department of Physics at the College of Education for Pure Sciences examined a master's thesis titled "Preparation and Characterization of Nanoscale Electrodes Based on Graphene and Graphene/Nickel-Aluminum Hydroxide Composites for Flexible Supercapacitor Applications."
The thesis, presented by researcher Qassam Razzaq Hassan Jasim, focuses on the fabrication of flexible supercapacitors using accessible chemical methods. The aim was to achieve a synergy between high power density, rapid charge/discharge rates, and mechanical flexibility for applications in wearable and flexible electronics. Initially, graphene was synthesized via liquid-phase exfoliation and deposited onto aluminum foil substrates to serve as flexible, bendable current collectors and electrodes. Systematic structural and electrochemical characterization was conducted using Transmission Electron Microscopy (TEM), X-ray Diffraction (XRD), and various electrochemical techniques. The pure graphene-based electrodes achieved a high maximum specific capacitance.
The study subsequently involved the preparation of a hybrid supercapacitor by combining the previously synthesized graphene with nickel-aluminum layered double hydroxides (LDHs) prepared via the hydrothermal method. Surface morphology and crystalline structure were verified using SEM, STEM, XRD, and Raman spectroscopy. The resulting hybrid electrode, deposited on aluminum foil, exhibited a maximum specific capacitance of 490.34 F/g at a 0° angle; this value remained stable at 472.92 F/g even under full mechanical bending deformation (180°)

.

.