"Graphene quantum dots decorated on spinel nickel cobaltite nanocomposi" by Poonam R. Kharangarh, Nuggehalli M. Ravindra et al.
 

Graphene quantum dots decorated on spinel nickel cobaltite nanocomposites for boosting supercapacitor electrode material performance

Document Type

Article

Publication Date

9-25-2021

Abstract

Composites of transition metal oxides, with carbon, have been considered to be appropriate materials for enhancing their electrochemical properties in supercapacitor applications. In this study, we prepare Nickel-Cobaltite/ Graphene Quantum Dots (NiCo2O4/GQDs) composite structures that exhibit improved electrical conductivity and function as electrode materials with higher energy density in comparison to GQDs and NiCo2O4. The electrochemical performance of NiCo2O4/GQDs is confirmed through galvanostatic charge–discharge method for three electrode systems with an electrolyte of 0.1 M potassium hydroxide. The observed specific capacitance for the fabricated composite has been found to be 481.4 Fg−1 at 0.35Ag−1. It is higher than that of Graphene Quantum Dots (Csp~45.6 Fg−1). This is due to the enhancement in the electrical conductivity and diffusion of ions which become faster between electrodes and electrolyte. These findings demonstrate the unique characteristics of the fabricated composites as superior electrode materials for applications in supercapacitors.

Identifier

85105265262 (Scopus)

Publication Title

Journal of Alloys and Compounds

External Full Text Location

https://doi.org/10.1016/j.jallcom.2021.159990

ISSN

09258388

Volume

876

Grant

SR/WOS-A/PM-107/2017

Fund Ref

Department of Science and Technology, Ministry of Science and Technology, India

This document is currently not available here.

Share

COinS