Issue 6, 2021

A flame-retardant polymer electrolyte for high performance lithium metal batteries with an expanded operation temperature

Abstract

Polymer electrolytes with high ionic conductivity, good interfacial stability and safety are in urgent demand for practical rechargeable lithium metal batteries (LMBs). Herein we propose a novel flame-retardant polymerized 1,3-dioxolane electrolyte (PDE), which is in situ formed via a multifunctional tris(pentafluorophenyl)borane (TB) additive. The in situ formed PDE not only affords an integrated battery structure with stabilized electrode–electrolyte interface, but also achieves good flame retardancy, significantly expanded operating temperature limit and improved oxidative stability. Moreover, TB also contributes to a highly stable LiF-rich solid electrolyte interphase (SEI). In addition, the PDE has good compatibility with electrodes and polypropylene (PP) separator, hardly increasing the thickness of the battery, and the amount of additive TB is small, so there is no loss of gravimetric or volumetric energy density due to the polymerization. Based on the in situ formed PDE, Li–S batteries without the addition of LiNO3 demonstrate excellent cycle stability (>500 cycles) and a wide operating temperature (−20 to 50 °C); the high voltage Li–LiNi0.6Co0.2Mn0.2O2 and Li–LiFePO4 batteries both exhibit excellent electrochemical performance (>1200 cycles). In addition, the ultrasonic imaging technique developed by our group also demonstrates no gas generation inside pouch cells using PDE. This work provides a facile and practical approach to design a highly stable polymer electrolyte for high performance LMBs.

Graphical abstract: A flame-retardant polymer electrolyte for high performance lithium metal batteries with an expanded operation temperature

Supplementary files

Article information

Article type
Paper
Submitted
06 1月 2021
Accepted
29 4月 2021
First published
29 4月 2021

Energy Environ. Sci., 2021,14, 3510-3521

A flame-retardant polymer electrolyte for high performance lithium metal batteries with an expanded operation temperature

J. Xiang, Y. Zhang, B. Zhang, L. Yuan, X. Liu, Z. Cheng, Y. Yang, X. Zhang, Z. Li, Y. Shen, J. Jiang and Y. Huang, Energy Environ. Sci., 2021, 14, 3510 DOI: 10.1039/D1EE00049G

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