Citation: Caili Xu, Ming Zhang, Pengyu Li, Cheng Chen, Haiping Zhou, Shu Zhang, Mengqiang Wu. Fluorinated ester additive-assisted carbonate-based electrolyte enhances low temperature operation of LiFePO₄ batteries[J]. Chinese Chemical Letters, ;2026, 37(8): 111263. doi: 10.1016/j.cclet.2025.111263 shu

Fluorinated ester additive-assisted carbonate-based electrolyte enhances low temperature operation of LiFePO₄ batteries

School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, China

chemchen@std.uestc.edu.cn

shuzhang@uestc.edu.cn

mwu@uestc.edu.cn

Received Date: 26 February 2025
Revised Date: 17 April 2025
Accepted Date: 27 April 2025
Available Online: 27 April 2025

Figures(5)

The low-temperature performance of lithium iron phosphate (LiFePO₄) batteries remains a significant challenge. Electrolyte engineering has emerged as an effective strategy to address this issue efficiently. Herein, ethyl pentafluoropropionate (pFEP) is introduced into the carbonate-based electrolyte as a functional additive that enables LiLFP cells to cycle at −20 ℃ or even −40 ℃. Molecular dynamics (MD) simulations and spectroscopic characterization demonstrate that adding only 3% pFEP could effectively modify the electrolyte solvation structure, significantly increasing the content of contact ion pairs (CIPs) and aggregates (AGGs). This structural modification promotes the formation of a uniform LiF-rich interphase, which is crucial for improved battery performance. As a result, LiLFP cell with active cathode loading of 8.5 mg/cm² delivers 117.2 mAh/g and cycling stability over 130 cycles at −20 ℃. This work provides a cost-effective strategy for enhancing the low-temperature performance of LFP batteries.
- LiFePO₄ batteries,
- Low temperature,
- Fluorinated ester additive,
- Ethyl pentafluoropropionate
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Fluorinated ester additive-assisted carbonate-based electrolyte enhances low temperature operation of LiFePO4 batteries

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通讯作者: 陈斌, bchen63@163.com

Fluorinated ester additive-assisted carbonate-based electrolyte enhances low temperature operation of LiFePO₄ batteries