Cited by 203Advancements in Battery MaterialsAdvanced Battery Materials and TechnologiesAdvanced Battery Technologies Research

Ethylene‐Carbonate‐Free Electrolytes for Rechargeable Li‐Ion Pouch Cells at Sub‐Freezing Temperatures

Yao, Yu‐Xing, Yao, Nan, Zhou, Xi‐Rui, Li, Ze‐Heng, Yue, Xin‐Yang, Yan, Chong, Zhang, Qiang·2022·Advanced Materials

Abstract

Sub‐freezing temperature presents a significant challenge to the survival of current Li‐ion batteries (LIBs) as it leads to low capacity retention and poor cell rechargeability. The electrolyte in commercial LIBs relies too heavily on ethylene carbonate (EC) to produce a stable solid electrolyte interphase (SEI) on graphite (Gr) anodes, but its high melting point (36.4 °C) severely restricts ion transport below 0 °C, causing energy loss and Li plating. Here, a class of EC‐free electrolytes that exhibits remarkable low‐temperature performance without compromising cell lifespan is reported. It is found that at sub‐zero temperatures, EC forms highly resistive SEI that seriously impedes electrode kinetics, whereas EC‐free electrolytes create a highly stable, low‐impedance SEI through anion decomposition, which boosts capacity retention and eliminates Li plating during charging. Pouch‐type LiCoO 2 (LCO)|Gr cells with EC‐free electrolytes sustain 900 cycles at 25 °C with 1 C charge/discharge, and LiNi 0.85 Co 0.10 Al 0.05 O 2 (NCA)|Gr cells last 300 cycles at −15 °C with 0.3 C charge, both among the best‐performing in the literature under comparable conditions. Even at −50 °C, the NCA|Gr cell with EC‐free electrolytes still delivers 76% of its room‐temperature capacity, outperforming EC‐based electrolytes.

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Crossref · 10.1002/adma.202206448

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  • The methyl acetate-based, ethylene-carbonate-free electrolyte forms stable and highly conducting solid electrolyte interphases on graphite, preventing Li plating during charging and securing long battery lifetime at subzero temperatures.

    “This electrolyte is featured with the ability to form stable and highly conducting SEIs on graphite, thus preventing Li plating during charging and securing long battery lifetime at subzero temperatures.”
  • A graphite/NCA pouch cell using the methyl acetate-based, ethylene-carbonate-free electrolyte demonstrated extended cycle life at -15 °C with a 0.3 C charge rate and a high capacity retention of 76% of its room-temperature capacity at -50 °C.

    “As a result, the graphite/NCA pouch cell demonstrated extended cycle life at -15 °C with a 0.3 C charge rate and a high capacity retention of 76% of its RT capacity at -50 °C.”
  • A methyl acetate-based, ethylene-carbonate-free electrolyte developed by Zhang's group shows exceptional low-temperature performance.

    “Moreover, the MA-based EC-free electrolyte developed by Zhang's group shows exceptional LT performance [47].”

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Authors
Yao, Y., Yao, N., Zhou, X., Li, Z., Yue, X., Yan, C., & Zhang, Q.
Affiliations
  • Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical Engineering Tsinghua University Beijing 100084 China
  • Tsinghua University (CN)
Corresponding author
Zhang, Qiang
Venue
Advanced Materials
Publisher
Wiley
Published
2022-10-06
Volume
34
Issue
45
Pages
e2206448-e2206448
ISSN
  • 0935-9648 (ISSN-L)
  • 1521-4095
OpenAlex
W4295762463
Cited by
203
References
0
Citations by year
2026: 43 · 2025: 64 · 2024: 56 · 2023: 40
FWCI
10.96
Type
journal article
Language
en
Open access
closed
Locations
  • Advanced Materials (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Basic Research Program of China (2021YFB2500300)
Topics
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Advancements in Battery Materials
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Advanced Battery Materials and Technologies
  • Physical Sciences › Engineering › Automotive Engineering › Advanced Battery Technologies Research
Keywords
rechargeable lithium-ion batteries, pouch cells, solid electrolyte interphase, anion decomposition, lithium plating, LiCoO2 cathode, NCA cathode, graphite anode, low-temperature cycling stability, capacity retention

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