Issue 43, 2023, Issue in Progress

Molecular dynamics study of fluorosulfonyl ionic liquids as electrolyte for electrical double layer capacitors

Abstract

The development of high-performance supercapacitors is an important goal in the field of energy storage. Ionic liquids (ILs) are promising electrolyte materials for efficient energy storage in supercapacitors, because of the high stability, low volatility, and wider electrochemical stability window than traditional electrolytes. However, ILs-based supercapacitors usually show a relatively lower power density owing to the inherent viscosity-induced low electrical conductivity. Fluorosulfonyl ILs have aroused much attention in energy storage devices due to its low toxicity and excellent stability. Here, we propose that structural modification is an effective way to improve the energy storage performance of fluorosulfonyl ILs through the classical molecular dynamics (MD) method. Four fluorosulfonyl ILs with different sizes and symmetries were considered. Series of properties including conductivity, interface structure, and double-layer capacitance curves were systematically investigated. The results show that smaller size and more asymmetric structure can enhance self-diffusion coefficient and conductivity, and improve the electrochemical performance. Appropriate modification of the electrodes can further enhance the capacitive performance. Our work provides an opportunity to further understand and develop the fluorosulfonyl ILs electrolyte in supercapacitors.

Graphical abstract: Molecular dynamics study of fluorosulfonyl ionic liquids as electrolyte for electrical double layer capacitors

Supplementary files

Article information

Article type
Paper
Submitted
17 Jul 2023
Accepted
29 Sep 2023
First published
13 Oct 2023
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2023,13, 29886-29893

Molecular dynamics study of fluorosulfonyl ionic liquids as electrolyte for electrical double layer capacitors

S. Wang, Z. Li, G. Yang, J. Lin and Q. Xu, RSC Adv., 2023, 13, 29886 DOI: 10.1039/D3RA04798A

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