Sonication-supported synthesis of cobalt oxide assembled on an N-MWCNT composite for electrochemical supercapacitors via three-electrode configuration

Rajendra Kumar Nare,Praveen Kumar Basavi,Visweswara Rao Pasupuleti,Chinna Bathula,Rama Krishna Reddy Kotanka,Hemraj M Yadav,Vijay Kakani,Prakash Babu Dhanapal,Sivalingam Ramesh

doi:10.1038/s41598-022-05964-8

Abstract

The Co3O4@N-MWCNT composite was synthesized by a sonication-supported thermal reduction process for supercapacitor applications. The structural and morphological properties of the materials were characterized via Raman, XRD, XPS, SEM–EDX, and FE-TEM analysis. The composite electrode was constructed into a three-electrode configuration and examined by using CV, GCD and EIS analysis. The demonstrated electrochemical value of ~ 225 F/g at 0.5 A/g by the electrode made it appropriate for potential use in supercapacitor applications.

Highlights

The Co3O4@N-MWCNT composite was synthesized by a sonication-supported thermal reduction process for supercapacitor applications
A higher dispersion of the supported metals can be accomplished on N-MWCNTs than on nitrogen-free carbon nanotubes (CNTs), which was attributed to a higher amount of surface nucleation sites and to the formation of some individual sections around the N-rich sites, allowing efficient anchoring of metal nanoparticles for various potential applications.Frackowiak et al reported that the specific capacitance of MWCNTs was increased from (80 to 135) F g[−1 26, while treating MWCNTs with acid electrolyte and other KOH electrolytes is almost 90 F g−1
For the ID/IG values of N-MWCNTs, there was a small increase in intensity from 0.95 to 1.35, which proposes partially ordered crystal structures modified on the carbon surface

Summary

Introduction

The Co3O4@N-MWCNT composite was synthesized by a sonication-supported thermal reduction process for supercapacitor applications. The carbon nanotubes (CNTs) are widely used as support for active metal nanoparticles for catalytic properties due to thier outstanding resistance to challenging the reaction and surface properties for chemical functalization and nitrogen doping process. These surface functional groups can be used to modify the catalytic performance of the metal nanoparticles for various potential applications. The synthesized composite materials useful for supercapacitor application with excellent cyclic retention These surface functional groups can be used to tailor the catalytic performance of supported metal nanoparticles for various potential applications. A higher dispersion of the supported metals can be accomplished on N-MWCNTs than on nitrogen-free CNTs, which was attributed to a higher amount of surface nucleation sites and to the formation of some individual sections around the N-rich sites, allowing efficient anchoring of metal nanoparticles for various potential applications[30,31,32,33]

Methods

Results

Conclusion