Issue 5, 2024

Lithium-ion battery functionality over broad operating conditions via local high concentration fluorinated ester electrolytes

Abstract

Facilitating widespread adoption of electric vehicles will require next-generation battery systems that can operate reliably over a large temperature range, at high operating voltage, and under fast charging rates. Herein, a novel class of nonflammable fluorinated ester-based local high concentration electrolytes (LHCEs) are described. When cycled in commercially relevant graphite/LiNi0.8Mn0.1Co0.1O2 (NMC811) pouch cells, these electrolytes demonstrate improved capacity retention compared to carbonate-based electrolytes under multiple usage conditions including high voltage (4.5 V), fast charge (4C, 15 minutes), and low temperature (−20 °C) without sacrificing capacity retention at elevated temperature (40 °C). Low carbon, high fluoride cathode electrolyte interphases formed by the LHCE system yield a significant reduction in charge transfer impedance during cycling and contribute to capacity retention. These results demonstrate that using fluorinated esters in a LHCE modality enables creation of a new class of nonflammable electrolytes that can successfully operate over broad operating conditions.

Graphical abstract: Lithium-ion battery functionality over broad operating conditions via local high concentration fluorinated ester electrolytes

Supplementary files

Article information

Article type
Paper
Submitted
20 Dec 2023
Accepted
26 Apr 2024
First published
21 May 2024
This article is Open Access
Creative Commons BY-NC license

RSC Appl. Interfaces, 2024,1, 1077-1092

Lithium-ion battery functionality over broad operating conditions via local high concentration fluorinated ester electrolytes

C. D. Quilty, E. J. Marin Bernardez, A. Nicoll, M. J. Hossain, A. Kingan, D. J. Arnot, H. A. Mohamed, C. L. O'Connor, X. Tong, C. Jaye, D. A. Fischer, L. Wang, Y. Qi, E. S. Takeuchi, A. C. Marschilok, S. Yan, D. C. Bock and K. J. Takeuchi, RSC Appl. Interfaces, 2024, 1, 1077 DOI: 10.1039/D3LF00259D

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