The electrochemical performance of gallium nitride composited with g-C3N4 in bulk and oxidized forms for supercapacitors

Six composites were synthesized using g-C₃N₄ in two forms, namely Bulk and Oxidized, mixed with gallium nitride, and composites of materials were employed as electrode components for supercapacitors. The composites' physical and structural characteristics were analyzed and the electrochemical performance of composite materials containing varying ratios of GaN and g-C₃N₄ was analyzed. Galvanostatic charge-discharge investigations revealed that the Oxidized g-C₃N₄/GaN-1:2 composite exhibited a superior maximum specific capacitance compared to other electrode materials, achieving 200 F g⁻¹ at a current density of 2 A g⁻¹, which suggest that mixing GaN with different forms of g-C₃N₄ (Bulk and Oxidized) have the potential to produce favorable electrode materials suitable for application in electrochemical supercapacitors. The device demonstrated a remarkable high energy density of 1.5 µWh cm^-² at a power density of 327.9 mW cm^-², along with exceptional long-term durability.