Issue 19, 2022

Facile hydrothermal synthesis of cobaltosic sulfide nanorods for high performance supercapacitors

Abstract

With high reactivity, electrical conductivity, theoretical specific capacitance and well redox reversibility, transition metal sulfides are considered as a promising anode material for supercapacitors. Hence, we designed a simple two-step hydrothermal process to grow Co4S3 nanorod arrays in situ on flexible carbon cloth substrates. Benefited from the larger specific surface area of nanoarrays, the binder-free Co4S3 electrode demonstrates a higher specific capacity of 1.97 F cm−2 at a current density of 2 mA cm−2, while the Co3O4 electrode has a capacity of only 0.07 F cm−2 at the same current density. Surprisingly, at a high scan rate of 200 mV s−1, the synthesized Co4S3 electrode still maintains almost 100% of its initial capacitance after 5000 cycles. Moreover, when using the prepared Co4S3 and MnO2 electrode as the anode and cathode, the fabricated flexible supercapacitor obtains a high volumetric energy density of 0.87 mW h cm−3 (power density of 0.78 W cm−3) and a peak power density of 0.89 W cm−3 (energy density of 0.50 mW h cm−3). The excellent electrochemical properties imply that there is a large market for the prepared materials in flexible energy storage devices.

Graphical abstract: Facile hydrothermal synthesis of cobaltosic sulfide nanorods for high performance supercapacitors

Supplementary files

Article information

Article type
Paper
Submitted
14 Mar 2022
Accepted
08 Apr 2022
First published
14 Apr 2022
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2022,12, 11665-11670

Facile hydrothermal synthesis of cobaltosic sulfide nanorods for high performance supercapacitors

Y. Song, Y. Ding, C. Yang, X. Pei, G. Wang, D. Zheng, W. Xu, F. Wang and X. Lu, RSC Adv., 2022, 12, 11665 DOI: 10.1039/D2RA01648F

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