Achieving Safe and Stable Lithium-Based Batteries via Molecular Dipole Interactions

The lithium metal battery technology, utilizing a lithium metal anode and high-voltage cathodes, offers high power density, but faces challenges such as dendrite growth, dead lithium, and poor interfacial dynamics. Here, a nonflammable electrolyte is proposed based on dipole interactions between HTFP and DME solvents, enhancing Li+-FSI– coordination and reducing Li+ desolvation energy. The dipole interaction lowers the LUMO energy of solvated FSI–, promoting the formation of a stable interfacial phase and efficient lithium deposition and stripping. Consequently, Li||NCM811 cells exhibit ∼90% capacity retention over 500 cycles with >99.5% Coulombic efficiency and also perform well at −30 °C. In addition, commercial graphite||NCM523 pouch cells achieve 90% capacity retention after 500 cycles and high safety.

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Publication Details

Journal
ACS Energy Letters
Published
2025-03-18
DOI
https://doi.org/10.1021/acsenergylett.5c00710
Primary Topic
Advancements in Battery Materials
Type
article
Field-Weighted Citation Impact
0.00

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article

Achieving Safe and Stable Lithium-Based Batteries via Molecular Dipole Interactions

Siru He, Zhixin Liu, Peide Zhu, Zhitong Li et al.
2 links
ACS Energy Letters
Advancements in Battery Materials
article

Achieving Safe and Stable Lithium-Based Batteries via Molecular Dipole Interactions

Siru He, Zhixin Liu, Peide Zhu, Zhitong Li, Yuejiao Chen, Xingzhu Wang, Baomin Xu, Libao Chen, Lida Wang
article en

Abstract

The lithium metal battery technology, utilizing a lithium metal anode and high-voltage cathodes, offers high power density, but faces challenges such as dendrite growth, dead lithium, and poor interfacial dynamics. Here, a nonflammable electrolyte is proposed based on dipole interactions between HTFP and DME solvents, enhancing Li+-FSI– coordination and reducing Li+ desolvation energy. The dipole interaction lowers the LUMO energy of solvated FSI–, promoting the formation of a stable interfacial phase and efficient lithium deposition and stripping. Consequently, Li||NCM811 cells exhibit ∼90% capacity retention over 500 cycles with >99.5% Coulombic efficiency and also perform well at −30 °C. In addition, commercial graphite||NCM523 pouch cells achieve 90% capacity retention after 500 cycles and high safety.

ACS Energy LettersVol. 10(4)
Central South University (CN), Southern University of Science and Technology (CN), Vi Technology (United States) (US), Energy Storage Systems (United States) (US), Institute of Metallurgy (RU), State Key Laboratory of Powder Metallurgy, University of South China (CN)
Science, Technology and Innovation Commission of Shenzhen Municipality, Southern University of Science and Technology
Affordable and clean energy
Openalex Percentile: Top 96%
Advancements in Battery Materials
DOISourceOpenAlex
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Achieving Safe and Stable Lithium-Based Batteries via Molecular Dipole Interactions — Siru He, Zhixin Liu, et al. · ACS Energy Letters (2025) | TGRS Research Map | TGRS