Issue 41, 2022

A trade-off-free fluorosulfate-based flame-retardant electrolyte additive for high-energy lithium batteries

Abstract

The flammability of organic electrolytes raises increasing safety concerns about the high-capacity batteries of next-generation electric vehicles and smart grid systems. Herein, we report a synthetic dual-functional electrolyte additive bearing two-fold fluorosulfate moieties, which allows flame retardancy without sacrificing battery performance. Electrochemical performance is measured using a high-capacity cell built with a Ni-rich LiNi0.9Co0.05Mn0.05O2 cathode and lithium metal anode. Compared with triphenyl phosphate as a known representative flame-retardant, the fluorosulfate-based electrolyte additive shows remarkable capacity retention, reduced interfacial resistance, and enhanced rate capability via the formation of a stable cathode solid electrolyte interfacial layer due to the inflammable sulfite-to-sulfate conversion mechanism.

Graphical abstract: A trade-off-free fluorosulfate-based flame-retardant electrolyte additive for high-energy lithium batteries

Supplementary files

Article information

Article type
Paper
Submitted
25 Jul 2022
Accepted
08 Sep 2022
First published
08 Sep 2022

J. Mater. Chem. A, 2022,10, 21933-21940

A trade-off-free fluorosulfate-based flame-retardant electrolyte additive for high-energy lithium batteries

J. Oh, H. S. Lee, M. P. Kim, Y. Lee, S. Y. Hong and K. M. Kim, J. Mater. Chem. A, 2022, 10, 21933 DOI: 10.1039/D2TA05854E

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