Hindered Glymes for Graphite‐Compatible Electrolytes
Abstract
Organic carbonate mixtures are used almost exclusively as lithium battery electrolyte solvents. The linear compounds (dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate) act mainly as thinner for the more viscous and high‐melting ethylene carbonate but are the least stable component and have low flash points; these are serious handicaps for lifetime and safety. Polyethers (glymes) are useful co‐solvents, but all formerly known representatives solvate Li+ strongly enough to co‐intercalate in the graphite negative electrode and exfoliate it. We have put forward a new electrolyte composition comprising a polyether to which a bulky tert‐butyl group is attached (“hindered glyme”), thus completely preventing co‐intercalation while maintaining good conductivity. This alkyl‐carbonate‐free electrolyte shows remarkable cycle efficiency of the graphite electrode, not only at room temperature, but also at 50 and 70 °C in the presence of lithium bis(fluorosulfonimide). The two‐ethylene‐bridge hindered glyme has a high boiling point and a flash point of 80 °C, a considerable advantage for safety.
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Armand et al. proposed hindered glymes with bulky groups that prevent solvent co-intercalation due to their larger size and lower binding energy to Li+, making Li+ desolvation more favorable than co-intercalation.
“Armand et al. [54] proposed a family of “hindered glymes” with bulky groups that prevent solvent co-intercalation due to their larger size and lower binding energy to Li + making the Li + cation desolvation more favorable than co-intercalation.”
From Review on Low-Temperature Electrolytes for Lithium-Ion and Lithium Metal Batteries (2023) · cites this paper as [54]
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“Armand et al. [54] proposed a family of “hindered glymes” with bulky groups that prevent solvent co-intercalation due to their larger size and lower binding energy to Li + making the Li + cation desolvation more favorable than co-interca-lation.”
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- Authors
- Shanmukaraj, D., Grugeon, S., Laruelle, S., & Armand, M.
- Affiliations
- CIC energiGUNE (ES)
- Centre National de la Recherche Scientifique (FR)
- Corresponding author
- Armand, Michel
- Venue
- ChemSusChem
- Publisher
- Wiley
- Published
- 2015-07-16
- Volume
- 8
- Issue
- 16
- Pages
- 2691-2695
- ISSN
- 1864-5631 (ISSN-L)
- 1864-564X
- OpenAlex
- W2170251073
- Cited by
- 11
- References
- 0
- Citations by year
- 2026: 1 · 2025: 1 · 2024: 1 · 2023: 2 · 2020: 1 · 2018: 2 · 2016: 3
- FWCI
- 0.80
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- ChemSusChem (publishedVersion)
- PubMed (publishedVersion)
- HAL (submittedVersion)
- Funders
- LRCS-CNRS
- 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 › Automotive Engineering › Advanced Battery Technologies Research
- Keywords
- lithium battery electrolytes, graphite anode, ethylene carbonate, dimethyl carbonate, ethyl methyl carbonate, flash point, electrolyte safety, high-temperature cycling, ionic conductivity
- MeSH terms
- Electric Conductivity, Electrodes, Electrolytes, Graphite, Iron, Lithium, Phosphates
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