Cited by 143Advancements in Battery MaterialsAdvanced Battery Materials and TechnologiesBattery Modeling and Management

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Synergy of Weakly‐Solvated Electrolyte and Optimized Interphase Enables Graphite Anode Charge at Low Temperature

Yang, Yang, Fang, Zhong, Yin, Yue, Cao, Yongjie, Wang, Yonggang, Dong, Xiaoli, Xia, Yongyao·2022·Angewandte Chemie International Edition

Abstract

Graphite anode suffers from great capacity loss and even fails to charge (i.e. Li+‐intercalation) under low temperature, mainly arising from the large overpotential including sluggish de‐solvation process and insufficient ions movement in the solid electrolyte interphase (SEI). Herein, an electrolyte is developed by utilizing weakly solvated molecule ethyl trifluoroacetate and film‐forming fluoroethylene carbonate to achieve smooth de‐solvation and high ionic conductivity at low temperature. Evolution of SEI formed at different temperatures is further investigated to propose an effective room‐temperature SEI formation strategy for low‐temperature operations. The synergetic effect of tamed electrolyte and optimized SEI enables graphite with a reversible charge/discharge capacity of 183 mAh g−1 at −30 °C and fast‐charging up to 6C‐rate at room temperature. Moreover, graphite||LiFePO 4 full cell maintains a capacity retention of 78 % at −30 °C, and 37 % even at a super‐low temperature of −60 °C. This work offers a progressive insight towards fast‐charging and low‐temperature batteries.

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Metadata

Authors
Yang, Y., Fang, Z., Yin, Y., Cao, Y., Wang, Y., Dong, X., & Xia, Y.
Affiliations
Fudan University (CN)
Corresponding author
  • Dong, Xiaoli
  • Xia, Yongyao
Venue
Angewandte Chemie International Edition
Publisher
Wiley
Published
2022-08
Volume
61
Issue
36
Pages
e202208345-e202208345
ISSN
  • 1433-7851 (ISSN-L)
  • 1521-3773
OpenAlex
W4285495418
Cited by
143
References
55
Citations by year
2026: 19 · 2025: 45 · 2024: 40 · 2023: 36 · 2022: 3
FWCI
8.49
Type
journal article
Language
en
Open access
closed
Locations
  • Angewandte Chemie International Edition (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Key Research and Development Program of China (2018YFE0201702)
  • National Natural Science Foundation of China (21875045, 21935003, 22109028)
  • Natural Science Foundation of Shanghai (22ZR1404400)
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
graphite anode, solid electrolyte interphase, ethyl trifluoroacetate, fluoroethylene carbonate, ionic conductivity, SEI formation, fast charging, LiFePO4 full cell, capacity retention

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