An Investigation into the Production of rGO/CuO Composites Using Plant Wastes

The electrochemical energy storage that based on earth-abundant materials is essential because of the future demands. Because of carbon-based architecture supercapacitors, rapid charging/discharging, and long life cycle, they considered attractive compared to chemical to batteries. Therefore, copper oxide (CuO) as positive electrode and reduced grapheme oxide (rGO) as negative electrode materials were used for a high-performance supercapacitor in a low cost, simple, and ecofriendly method. During the present work, synthesized reduced graphene oxide/copper oxide (rGO/CuO) nanocomposite using a simple chemical method is carried and investigated. The crystallinity index (I-c) of CuO, 1.0 M rGO/CuO and rGO was 90.61%, 88.42%, and 86.25%, respectively, at 500 degrees C and one h, while it was 76.30%, 73.51%, and 67.77respectively, at 500 degrees C and 30 h. As the test temperature increases, I-c% of both rGO and 1.0 M rGO/CuO increases, and that of CuO decreases. As the test period increases, I-c% for rGO, CuO, and 1.0 M rGO/CuO decreases. As the molarity concentration increased, the crystallinity index of rGO/CuO composites increased. The specimens characteristics are carried and investigated using; EDX, SEM, GC/MS, and XRD analysis. The appearance of the peaks at 2 theta = 22.20 degrees and 43.58 degrees were related to GO, and peaks at 22 degrees, 20 degrees, 43.58 degrees, 50.70 degrees, and 74.37 degrees indicated the synthesis of the nanocomposite.

Automated summary

This study successfully synthesized CuO/rGO nanocomposite as the positive and negative electrode materials for supercapacitors using a low-cost, simple, and eco-friendly method, and the performance was characterized through various experiments. The results showed that the crystallinity index of CuO, rGO, and rGO/CuO varied with temperature and time. Additionally, the concentration had an impact on the crystallinity index of the composite material.