Electrochemical charge storage performance of mesoporous MoO3@Co3O4 nanocomposites as electrode materials. (21st January 2022)

• Record Type: Journal Article
• Authors: Mohapatra, Dillip Kumar; Praharaj, Swetapadma; Rout, Dibyaranjan
• Is Part Of: Nanotechnology. Volume 33:Number 15(2022)
• Publication Date: 2022-01-21
• Subjects: MoO3@Co3O4 -- charge storage -- electrochemical capacitor -- cyclic voltammetry -- nanocomposite -- hydrothermal; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/ac467e
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: Constructing a novel nanocomposite structure based on Co3 O4 is of the current interest to design and develop efficient electrochemical capacitors. The capacitive performance of MoO3 @Co3 O4 nanocomposite is compared with pristine Co3 O4 nanoparticles, both of them being synthesized by hydrothermal technique. A BET surface area of ∼41 m 2 g −1 (almost twice that of Co3 O4 ) and average pore size of 3.6 nm is found to be suitable for promoting Faradaic reactions in the nanocomposite. Electrochemical measurements conducted on both samples predict capacitive behavior with quasi-reversible redox reactions. MoO3 @Co3 O4 nanocomposite is capable of delivering a superior specific capacitance of 1248 F g −1 at 0.5 A g −1 along with notable stability of 92% even after 2000 cycles of charge–discharge and Coulombic efficiency approaching 100% at 10 A g −1 . The outstanding results obtained in this work assure functional adequacy of MoO3 @Co3 O4 nanocomposite in fabricating high-performance electrochemical capacitors.