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Stabilizing lithium metal using ionic liquids for long-lived batteries

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Basile, A., Bhatt, A. I., O’Mullane, A. P.·2016·Nature Communications
DOI 10.1038/ncomms11794
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Abstract

Suppressing dendrite formation at lithium metal anodes during cycling is critical for the implementation of future lithium metal-based battery technology. Here we report that it can be achieved via the facile process of immersing the electrodes in ionic liquid electrolytes for a period of time before battery assembly. This creates a durable and lithium ion-permeable solid–electrolyte interphase that allows safe charge–discharge cycling of commercially applicable Li|electrolyte|LiFePO 4 batteries for 1,000 cycles with Coulombic efficiencies >99.5%. The tailored solid–electrolyte interphase is prepared using a variety of electrolytes based on the N-propyl-N-methylpyrrolidinium bis(fluorosulfonyl)imide room temperature ionic liquid containing lithium salts. The formation is both time- and lithium salt-dependant, showing dynamic morphology changes, which when optimized prevent dendrite formation and consumption of electrolyte during cycling. This work illustrates that a simple, effective and industrially applicable lithium metal pretreatment process results in a commercially viable cycle life for a lithium metal battery.

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Metadata

Authors
Basile, A., Bhatt, A. I., & O’Mullane, A. P.
Venue
Nature Communications
Publisher
Springer Science and Business Media LLC
Published
2016-06-13
Volume
7
Issue
1
Pages
ncomms11794-ncomms11794
ISSN
2041-1723 (ISSN-L)
DOI
10.1038/ncomms11794
OpenAlex
W2429337228
Cited by
467
References
5
FWCI
30.03
Type
journal article
Language
en
Open access
gold
Licence

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Basile, A., Bhatt, A. I., & O’Mullane, A. P. (2016). Stabilizing lithium metal using ionic liquids for long-lived batteries. Nature Communications. https://doi.org/10.1038/ncomms11794

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