Cited by 241Advanced Battery Materials and TechnologiesAdvancements in Battery MaterialsAdvanced battery technologies research

Electrolyte design implications of ion-pairing in low-temperature Li metal batteries

Holoubek, John, Kim, Kangwoon, Yin, Yijie, Wu, Zhaohui, Liu, Haodong, Li, Mingqian, Chen, Amanda, Gao, Hongpeng +4 more·2022·Energy & Environmental Science

Abstract

The reversibility of Li metal batteries suffers beneath 0 °C due to a heightened charge-transfer barrier. Herein, the introduction of ion-pairs within the electrolyte is shown to improve this behavior, enabling hundreds of cycles down to −40 °C.

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Crossref · 10.1039/d1ee03422g

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  • DME-based LHCE systems with bis(2,2,2-trifluoroethyl) ether as diluent allow modulation of the degree of ion-pairing while maintaining relatively low bulk viscosity.

    “bis(2,2,2-trifluoroethyl) ether (BTFE) as the diluent, which allows for the modulation of the degree of ion-pairing while maintaining a relatively low bulk viscosity [58].”
  • Both experimental and theoretical results demonstrated a distinct ion-pairing transition when the local concentration exceeds 4 M (3:1 BTFE/DME ratio), resulting in stable cycling of LMA and NMC811 cathodes even at low temperatures.

    “Both experimental and theoretical results demonstrated that there is a distinct ion-pairing transition when the local concentration exceeds 4 M (3:1 BTFE/DME ratio), which resulted in stable cycling of LMA and NMC811 cathodes even at LTs.”

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Authors
Holoubek, J., Kim, K., Yin, Y., Wu, Z., Liu, H., Li, M., Chen, A., Gao, H., Cai, G., Pascal, T. A., Liu, P., & Chen, Z.
Affiliations
University of California San Diego (US)
Corresponding author
  • Pascal, Tod A.
  • Liu, Ping
  • Chen, Zheng
Venue
Energy & Environmental Science
Published
2022
Volume
15
Issue
4
Pages
1647-1658
ISSN
  • 1754-5692 (ISSN-L)
  • 1754-5706
OpenAlex
W4225918206
Cited by
241
References
0
Citations by year
2026: 32 · 2025: 69 · 2024: 64 · 2023: 51 · 2022: 25
FWCI
14.31
Type
journal article
Language
en
Open access
closed
Locations
Energy & Environmental Science (publishedVersion)
Funders
  • National Science Foundation (DMR-2011924, ECCS-1542, ACI-1548562148)
  • National Aeronautics and Space Administration (ECF 80NSSC18K1512, 80NSSC20K1174)
Topics
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Advanced Battery Materials and Technologies
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Advancements in Battery Materials
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Advanced battery technologies research
Keywords
lithium metal batteries, low-temperature batteries, ion pairing, electrolyte design, charge transfer barrier, cycling reversibility, lithium metal anode

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