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Stable cycling of high-voltage lithium metal batteries in ether electrolytes

Journal Article · · Nature Energy
The development of functional electrolytes that are stable with both the lithium (Li) anode and the 4-V cathode is of significant importance to enable long-term cycling stability of high-voltage Li metal batteries. Due to their limited oxidative stability (< 4 V), ethers have been excluded from being used in high-voltage batteries for a long time, in spite of their superior reductive stability against Li metal compared to the conventional organic carbonate electrolytes. Here we report a concentrated dual-salt/ether electrolyte design that can form stable interfacial layers on both the high-voltage LiNi1/3Mn1/3Co1/3O2 cathode and the Li metal anode, thus realizing an unprecedented capacity retention >90% over 300 cycles with a charge cut-off voltage of 4.3 V. This study offers a promising approach to enabling ether electrolytes for high-voltage applications, expanding a new spectrum of solvent choices for high-voltage Li metal batteries.
Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-76RL01830
OSTI ID:
1476992
Report Number(s):
PNNL-SA-131449
Journal Information:
Nature Energy, Journal Name: Nature Energy Journal Issue: 9 Vol. 3; ISSN 2058-7546
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English

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