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Ethylene‐Carbonate‐Free Electrolytes for Rechargeable Li‐Ion Pouch Cells at Sub‐Freezing Temperatures
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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“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.”
From Review on Low-Temperature Electrolytes for Lithium-Ion and Lithium Metal Batteries (2023) · cites this paper as [47]
In the citing paper
“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.”
From Review on Low-Temperature Electrolytes for Lithium-Ion and Lithium Metal Batteries (2023) · cites this paper as [47]
In the citing paper
“Moreover, the MA-based EC-free electrolyte developed by Zhang's group shows exceptional LT performance [47].”
From Review on Low-Temperature Electrolytes for Lithium-Ion and Lithium Metal Batteries (2023) · cites this paper as [47]
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Metadata
- 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 › Battery Modeling and Management
- 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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