Advanced Energy Materials, volume 13, issue 32

Fluorinated Solvent Molecule Tuning Enables Fast‐Charging and Low‐Temperature Lithium‐Ion Batteries

Publication typeJournal Article
Publication date2023-07-05
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor27.8
ISSN16146832, 16146840
General Materials Science
Renewable Energy, Sustainability and the Environment
Abstract

Popularly‐used fluorination can effectively weaken Li+‐solvent interaction to facilitate the desolvation process at low temperature; however, high fluorination degree sacrifices salt dissociation and ionic conductivity. Herein, functional fluorinations are well tuned with different amounts of F atoms to balance Li+‐solvent binding energy and ion movement, which reveals the fluorination effect on the solvation behavior and low‐temperature performance. Noteworthily, the moderately‐fluorinated ethyl difluoroacetate (EDFA) successfully favors a lower binding energy than less‐fluorinated ethyl fluoroacetateand superior salt dissociation more than highly‐fluorinated ethyl trifluoroacetate, realizing the trade‐off between weak affinity and sufficient ionic conductivity. The well‐formulated EDFA‐based electrolyte exhibits a unique solvation sheath and generates inorganic‐rich solid electrolyte interphase with low resistance for smooth Li+ diffusion, which enables graphite anodes with excellent fast‐charging capability (196 mAh g−1 at 6 C) and impressive low‐temperature performance with a reversible capacity of 279 mAh g−1 under −40 °C. Subsequently, the wide electrochemical potential window of EDFA‐based electrolyte endows the 1.2 Ah LiNi0.8Co0.1Mn0.1O2 (NCM811)||graphite pouch cells with a high reversible capacity retention of 58.3% at −30 °C and discharge capacity of 790 mAh at −40 °C. Such solvent molecules with a moderately‐fluorinated strategy promise advanced electrolyte design for lithium‐ion batteries operating under harsh conditions.

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Mo Y. et al. Fluorinated Solvent Molecule Tuning Enables Fast‐Charging and Low‐Temperature Lithium‐Ion Batteries // Advanced Energy Materials. 2023. Vol. 13. No. 32.
GOST all authors (up to 50) Copy
Mo Y., Liu G., Yin Y., Tao M., Chen J., Peng Yu, Wang Y., Yang Y., Wang C., Dong X., Xia Y. Fluorinated Solvent Molecule Tuning Enables Fast‐Charging and Low‐Temperature Lithium‐Ion Batteries // Advanced Energy Materials. 2023. Vol. 13. No. 32.
RIS |
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RIS Copy
TY - JOUR
DO - 10.1002/aenm.202301285
UR - https://doi.org/10.1002/aenm.202301285
TI - Fluorinated Solvent Molecule Tuning Enables Fast‐Charging and Low‐Temperature Lithium‐Ion Batteries
T2 - Advanced Energy Materials
AU - Mo, Yanbing
AU - Liu, Gaopan
AU - Yin, Yue
AU - Tao, Mingming
AU - Chen, Jiawei
AU - Peng Yu
AU - Wang, Yonggang
AU - Yang, Yong
AU - Wang, Congxiao
AU - Dong, Xiaoli
AU - Xia, Yongyao
PY - 2023
DA - 2023/07/05 00:00:00
PB - Wiley
IS - 32
VL - 13
SN - 1614-6832
SN - 1614-6840
ER -
BibTex
Cite this
BibTex Copy
@article{2023_Mo,
author = {Yanbing Mo and Gaopan Liu and Yue Yin and Mingming Tao and Jiawei Chen and Peng Yu and Yonggang Wang and Yong Yang and Congxiao Wang and Xiaoli Dong and Yongyao Xia},
title = {Fluorinated Solvent Molecule Tuning Enables Fast‐Charging and Low‐Temperature Lithium‐Ion Batteries},
journal = {Advanced Energy Materials},
year = {2023},
volume = {13},
publisher = {Wiley},
month = {jul},
url = {https://doi.org/10.1002/aenm.202301285},
number = {32},
doi = {10.1002/aenm.202301285}
}
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