Issue 5, 2021

Principle in developing novel fluorinated sulfone electrolyte for high voltage lithium-ion batteries

Abstract

A new class of fluorinated sulfones, β-fluorinated sulfones, were designed and synthesized as electrolyte solvents for high voltage lithium-ion batteries. While the oxidation potential of β-fluorinated sulfones is slightly lower than that of α-fluorinated sulfones, it is still significantly higher than the oxidation potential of regular sulfones, which already possess fairly high anodic stability. However, β-fluorinated sulfones exhibit a significant decrease in reduction potential compared to α-fluorinated sulfones, rendering them more stable towards graphite anodes. Moreover, the reduced lithium solvating power of β-fluorinated sulfones compared to regular sulfones mitigates the transition metal dissolution of cathodes. Taken together, these middle ground properties of β-fluorinated sulfone-based electrolytes enable the very stable long-term cycling of graphite‖LiNi0.6Co0.2Mn0.2O2 full cells. The outstanding performance of β-fluorinated sulfones designed by applying the “golden middle way” paves a new path for the development of an effective electrolyte system.

Graphical abstract: Principle in developing novel fluorinated sulfone electrolyte for high voltage lithium-ion batteries

Supplementary files

Article information

Article type
Communication
Submitted
13 Dec 2020
Accepted
18 Mar 2021
First published
24 Mar 2021

Energy Environ. Sci., 2021,14, 3029-3034

Principle in developing novel fluorinated sulfone electrolyte for high voltage lithium-ion batteries

C. Su, M. He, J. Shi, R. Amine, Z. Yu, L. Cheng, J. Guo and K. Amine, Energy Environ. Sci., 2021, 14, 3029 DOI: 10.1039/D0EE03890C

To request permission to reproduce material from this article, 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 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