Highly efficient CuO/reduced graphene oxide nanocomposite as an electrode material for electrochemical application

• Published in: The Journal of physics and chemistry of solids 2024-08, Vol.191, p.112050, Article 112050
• Main Authors: Mushtaq, Tabinda, Shabbir, Muhammad Kaleem, Ahmed, Muhammad Shafiq, Ashfaq, J.M., Khisro, Said Nasir, Jelani, Mohsan, Akhtar, Javeed, Ali, Ghulam, Naz, Rabbia, Nadeem, Ahmed, Thebo, Khalid Hussain
• Format: Article
• Language: English
• Subjects: Cyclic stability; Cyclic voltammetry; Electrode materials; Reduced graphene oxide; Specific capacitances
• ISSN: 0022-3697; 1879-2553
• DOI: 10.1016/j.jpcs.2024.112050

Herein, a copper oxide/reduced graphene oxide (CuO/rGO) nanocomposite was synthesized using the insitu co-precipitation method. The as-prepared nanomaterials were characterized by Fourier-transform infrared (FT-IR) spectroscopy, field-emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), and Raman spectroscopy. Further, cyclic voltammetry, Galvano static charge-discharge curves, and electrochemical impedance spectroscopy were used to measure efficiency to store charge, cycle stability, and ion transport of nanocomposite. The CuO/rGO nanocomposite (1:2) shows a retention of 86.7 % of its initial capacitance up to 10000 cycles at 10 Ag-1. The specific capacitances of CuO/rGO (1:1) and CuO/rGO (1:2) nanocomposites were determined to be 100 Fg-1 and 259 Fg-1, respectively, at 8 Ag-1. The as-prepared CuO/rGO nanocomposite has proven to have the ability to function as an anode material and secondary power backup electrode. This study provides a new avenue to design CuO/rGO-based novel electrode materials for future electrochemical storage devices. [Display omitted] •CuO/reduced graphene oxide (CuO/rGO) nanocomposite was synthesized using the insitu co-precipitation method.•The CV results showed that the CuO/rGO nanocomposite has excellent pseudocapacitor behavior.•High specific capacitances of CuO/rGO (1:1) and CuO/rGO (1:2) nanocomposites were determined to be 297 F g−1 and 362 F g−1, respectively.•CuO/rGO (1:2) composite shows high capacitance with stability up to 86.7 % after 10,000 cycles.