Surface assembly of Fe3O4 nanodiscs embedded in reduced graphene oxide as a high-performance negative electrode for supercapacitors. Issue 11 (1st August 2020)

• Record Type: Journal Article
• Authors: Khan, Abdul Jabbar; Khan, Asad; Javed, Muhammad Sufyan; Arshad, Muhammad; Asim, Sumreen; Khalid, Muhammad; Siyal, Sajid Hussain; Hussain, Shahid; Hanif, Muddasir; Liu, Zhongwu
• Is Part Of: Ceramics international. Volume 46:Issue 11(2020)Part B
• Page Start: 19499
• Page End: 19505
• Publication Date: 2020-08-01
• Subjects: Fe3O4 nanodiscs -- Reduced graphene oxide -- Negative electrode -- Supercapacitors; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2020.04.303
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: In this work, iron oxide (Fe3 O4 ) nanodiscs and anchored on reduced graphene oxide (rGO) as a nanocomposite (Fe3 O4 /rGO) have been fabricated through a surface, scalable hydrothermal process. The morphological and structural studies of Fe3 O4 /rGO nanodiscs are analyzed by various techniques such as XRD, XPS, SEM, TEM, and TGA, etc. The Fe3 O4 /rGO electrode is tested as a negative electrode in a basic potassium hydroxide (KOH) electrolyte using a three-electrode system for supercapacitor applications. The optimized electrochemical properties of Fe3 O4 /rGO are systematically compared with bare Fe3 O4 and it is found that the rGO greatly enhanced its performance as a negative electrode. The Fe3 O4 /rGO nanodiscs demonstrated a notably high-specific capacitance of 1149 F/g at 1.5 A/g better than that of Fe3 O4 nanodiscs (920 F/g at 1.5 A/g). Furthermore, the Fe3 O4 /rGO displays the superior cyclic stability of 97.53% after running continuous 10000 GCD cycles at a high current density of 10 A/g, while bare Fe3 O4 attained 87.82% at identical conditions. The fascinating electrochemical performance can be benefited for future fabrications of iron graphene-based negative electrode material for SCs. Graphical abstract: Image 1 Highlights: Fe3 O4 /rGO nanodiscs composite was prepared through the superficial hydrothermal method. The use of rGO significantly enhances the properties of Fe3 O4 nanodiscs. Fe3 O4 /rGO nanodiscs composite as a negative electrode is promising for electrochemical energy storage. The Fe3 O4 /rGO composite exhibit a specific capacitance of 1149 F/g at 1.5 A/g.