Enhanced electrochemical performance with exceptional capacitive retention in Ce–Co MOFs/Ti3C2Tx nanocomposite for advanced supercapacitor applications

• Published in: Heliyon 2024-09, Vol.10 (17), p.e36540, Article e36540
• Main Authors: Siddiqui, Rabia, Rani, Malika, Shah, Aqeel Ahmed, Siddique, Sadaf, Ibrahim, Akram
• Format: Article
• Language: English
• Subjects: Cyclic stability; Electrochemical surface area; Energy density; Equivalent series resistance (ESR); Hydrothermal method; Metal organic frameworks (MOFs); Specific capacitance
• ISSN: 2405-8440; 2405-8440
• DOI: 10.1016/j.heliyon.2024.e36540

This study introduces a high-performance Ce–Co MOFs/Ti3C2Tx nanocomposite, synthesized via hydrothermal methods, designed to advance supercapacitor technology. The integration of Ce–Co metal-organic frameworks (MOFs) with Ti3C2Tx (Mxene) yields a composite that exhibits superior electrochemical properties. Structural analyses, including X-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM), confirm the successful formation of the composite, featuring well-defined rod-like Ce–Co MOFs and layered Ti3C2Tx sheets. Electrochemical evaluation highlights the exceptional performance of the Ce–Co MOFs/Ti3C2Tx nanocomposite, achieving a specific capacitance of 483.3 Fg⁻1 at 10 mVs⁻1, a notable enhancement over the 200 Fg⁻1 of Ce–Co MOFs. It also delivers a high energy density of 78.48 Whkg⁻1 compared to 19 Whkg⁻1 for Ce–Co MOFs. Remarkably, the nanocomposite shows outstanding cyclic stability with a capacitance retention of 109 % after 4000 cycles and electrochemical surface area (ECSA) of 845 cm2, coupled with a reduced charge transfer resistance (Rct) of 2.601 Ω and an equivalent series resistance (ESR) of 0.8 Ω. These findings demonstrate that the Ce–Co MOFs/Ti3C2Tx nanocomposite is a groundbreaking material, offering enhanced energy storage, conductivity, and durability, positioning it as a leading candidate for next-generation supercapacitors.