Issue 38, 2019

High-performance supercabatteries using graphite@diamond nano-needle capacitor electrodes and redox electrolytes

Abstract

Supercabatteries have the characteristics of supercapacitors and batteries, namely high power and energy densities as well as long cycle life. To construct them, capacitor electrodes with wide potential windows and/or redox electrolytes are required. Herein, graphite@diamond nano-needles and an aqueous solution of Fe(CN)63−/4− are utilized as the capacitor electrode and the electrolyte, respectively. This diamond capacitor electrode has a nitrogen-doped diamond core and a nano-graphitic shell. In 0.05 M Fe(CN)63−/4− + 1.0 M Na2SO4 aqueous solution, the fabricated supercabattery has a capacitance of 66.65 mF cm−2 at a scan rate of 10 mV s−1. It is stable over 10 000 charge/discharge cycles. The symmetric supercabattery device assembled using a two-electrode system possesses energy and power densities of 10.40 W h kg−1 and 6.96 kW kg−1, respectively. These values are comparable to those of other energy storage devices. Therefore, diamond supercabatteries are promising for many industrial applications.

Graphical abstract: High-performance supercabatteries using graphite@diamond nano-needle capacitor electrodes and redox electrolytes

  • This article is part of the themed collection: Nanocarbons

Supplementary files

Article information

Article type
Paper
Submitted
15 avq 2019
Accepted
06 sen 2019
First published
06 sen 2019
This article is Open Access
Creative Commons BY-NC license

Nanoscale, 2019,11, 17939-17946

High-performance supercabatteries using graphite@diamond nano-needle capacitor electrodes and redox electrolytes

S. Yu, K. J. Sankaran, S. Korneychuk, J. Verbeeck, K. Haenen, X. Jiang and N. Yang, Nanoscale, 2019, 11, 17939 DOI: 10.1039/C9NR07037K

This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. You can use material from this article in other publications, without requesting further permission from the RSC, provided that the correct acknowledgement is given and it is not used for commercial purposes.

To request permission to reproduce material from this article in a commercial publication, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party commercial publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements