Cited by 339Advancements in Battery MaterialsAdvanced Battery Technologies ResearchAdvanced Battery Materials and Technologies

Electrolytes for Low‐Temperature Lithium Batteries Based on Ternary Mixtures of Aliphatic Carbonates

Smart, M. C., Ratnakumar, B. V., Surampudi, S.·1999·Journal of The Electrochemical Society

Abstract

The low‐temperature performance of lithium‐ion cells is mainly limited by the electrolyte solution, which not only determines the ionic mobility between electrodes but also strongly affects the nature of surface films formed on the carbonaceous anode. The surface films provide kinetic stability to the electrode (toward electrolyte) and permit charge (electron) transfer across them, which in turn determine the cycle life and rate capability of lithium‐ion cells. Aiming at enhancing low‐temperature cell performance, we have studied electrolyte solutions based on different ratios of alkyl carbonate solvent mixtures, i.e., ethylene carbonate (EC), dimethyl carbonate (DMC), and diethyl carbonate (DEC), in terms of electrolyte conductivity, film resistance, film stability, and kinetics of lithium intercalation and deintercalation, at various temperatures. Electrolytes based on the ternary mixtures of EC, DEC, and DMC emerged as preferred combination compared to the binary analogues both in terms of conductivity and surface film characteristics, especially at low temperatures. These studies are further corroborated in sealed AA cells, which showed a synergistic effect of high durability from the DMC‐based solutions and improved low‐temperature performance from the DEC‐based electrolytes. © 1999 The Electrochemical Society. All rights reserved.

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Crossref · 10.1149/1.1391633

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  • The ternary electrolyte 1 M LiPF6 in EC:DMC:DEC (1:1:1) resulted in the largest discharge capacity in a graphite||LiCoO2 cell.

    “This resulted in the largest discharge capacity in a graphite||LiCoO 2 cell using the ternary electrolyte (Fig. 4b).”
  • Compared with the binary electrolytes 1 M LiPF6 in EC:DMC (30:70) and 1 M LiPF6 in EC:DEC (30:70), the ternary electrolyte 1 M LiPF6 in EC:DMC:DEC (1:1:1) showed the highest ionic conductivity at -20 °C due to a synergistic effect.

    “Compared to the two binary electrolytes of 1 M LiPF 6 in EC:DMC (30:70) and 1 M LiPF 6 in EC:DEC (30:70), the ternary electrolyte of 1 M LiPF 6 in EC:DMC:DEC (1:1:1) showed the highest ionic conductivity at -20 °C due to synergistic effect as shown in Fig. 4a.”

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Authors
Smart, M. C., Ratnakumar, B. V., & Surampudi, S.
Affiliations
California Institute of Technology (US)
Venue
Journal of The Electrochemical Society
Published
1999-02-01
Volume
146
Issue
2
Pages
486-492
ISSN
  • 0013-4651 (ISSN-L)
  • 1945-7111
OpenAlex
W2118468250
Cited by
339
References
0
Citations by year
2026: 5 · 2025: 24 · 2024: 21 · 2023: 19 · 2022: 18 · 2021: 22 · 2020: 25 · 2019: 17 · 2018: 31 · 2017: 13 · 2016: 11 · 2015: 11 · 2014: 12 · 2013: 10 · 2012: 3
FWCI
11.98
Type
journal article
Language
en
Open access
closed
Locations
Journal of The Electrochemical Society (publishedVersion)
Funders
Jet Propulsion Laboratory
Topics
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Advancements in Battery Materials
  • Physical Sciences › Engineering › Automotive Engineering › Advanced Battery Technologies Research
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Advanced Battery Materials and Technologies
Keywords
lithium-ion battery electrolytes, ternary solvent mixtures, ethylene carbonate, dimethyl carbonate, diethyl carbonate, electrolyte conductivity, solid electrolyte interphase, surface film resistance, lithium intercalation kinetics, carbon anodes

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