Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 18, 2016
Previous Article Next Article

Designing binder-free, flexible electrodes for high-performance supercapacitors based on pristine carbon nano-onions and their composite with CuO nanoparticles

Author affiliations

Abstract

The increasing demand for energy has triggered tremendous research efforts for the development of light-weight and durable energy storage devices. This requires exploring simple and economical methods to prepare the active materials and to design lightweight, flexible, free-standing supercapacitor electrodes in an inexpensive binder-free process. Herein, we try to address both these critical issues using CNOs and their composite with CuO as the active material. Active materials were supported on cotton wipes by a simple “sonication and drying” process to obtain light-weight, flexible and free-standing binder-free electrodes. In a symmetrical two-electrode cell, a pristine CNO electrode delivers a specific capacitance of 102.16 F g−1 (20 mV s−1), an energy density of 14.18 W h kg−1 and a power density of 2448 W kg−1, which are the highest values reported so far for CNO-based materials. CNO–CuO nanocomposites demonstrate a very significant specific capacitance of 420 F g−1 (10 mV s−1) with deliverable energy and power density at 58.33 W h kg−1 and 4228 W kg−1, respectively. Electrodes of both the active materials show an excellent cyclic performance and stability, retaining up to 90–95% of their initial capacitance after 5000 charge–discharge cycles at a current density of 5 A g−1. A simple cost estimation indicates that our device can deliver an energy density of 58.33 W h kg−1 at an estimated cost of less than 1 $.

Graphical abstract: Designing binder-free, flexible electrodes for high-performance supercapacitors based on pristine carbon nano-onions and their composite with CuO nanoparticles

Back to tab navigation

Supplementary files

Article information


Submitted
10 Nov 2015
Accepted
15 Jan 2016
First published
19 Jan 2016

RSC Adv., 2016,6, 14720-14729
Article type
Paper
Author version available

Designing binder-free, flexible electrodes for high-performance supercapacitors based on pristine carbon nano-onions and their composite with CuO nanoparticles

D. Mohapatra, S. Badrayyana and S. Parida, RSC Adv., 2016, 6, 14720
DOI: 10.1039/C5RA23700A

Social activity

Search articles by author

Spotlight

Advertisements