Composite Electrolyte Based on Hyperbranched Fluoropolymer for Lithium Metal Batteries

Lin-qing Li; Yi-min Liu; Peng Wen; Xin-rong Lin

doi:10.11777/j.issn1000-3304.2025.25297

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Composite Electrolyte Based on Hyperbranched Fluoropolymer for Lithium Metal Batteries

Research Article | 更新时间：2026-05-08

- Composite Electrolyte Based on Hyperbranched Fluoropolymer for Lithium Metal Batteries
  增强出版
- Acta Polymerica Sinica Vol. 57, Issue 5, Pages: 1011-1022(2026)
- 作者机构：
  
  昆山杜克大学自然与应用科学学部和环境研究中心昆山 215316
- 作者简介：
  
  Xin-rong Lin, E-mail: xl422@duke.edu
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2025.25297
  CLC：
- CSTR：32057.14.GFZXB.2025.7526
- Received：07 November 2025，
  
  Accepted：01 December 2025，
  
  Online First：08 January 2026，
  
  Published：20 May 2026
- 稿件说明：
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李林青, 刘昳敏, 文鹏, 林欣蓉. 基于超支化含氟聚合物的复合电解质及其在锂金属电池中的应用. 高分子学报, 2026, 57(5), 1011-1022.

Li, L. Q.; Liu, Y. M.; Wen, P.; Lin, X. R. Composite electrolyte based on hyperbranched fluoropolymer for lithium metal batteries. Acta Polymerica Sinica (in Chinese), 2026, 57(5), 1011-1022.
李林青, 刘昳敏, 文鹏, 林欣蓉. 基于超支化含氟聚合物的复合电解质及其在锂金属电池中的应用. 高分子学报, 2026, 57(5), 1011-1022. DOI： 10.11777/j.issn1000-3304.2025.25297. CSTR： 32057.14.GFZXB.2025.7526.

Li, L. Q.; Liu, Y. M.; Wen, P.; Lin, X. R. Composite electrolyte based on hyperbranched fluoropolymer for lithium metal batteries. Acta Polymerica Sinica (in Chinese), 2026, 57(5), 1011-1022. DOI： 10.11777/j.issn1000-3304.2025.25297. CSTR： 32057.14.GFZXB.2025.7526.

摘要

锂金属固态电池因高能量密度和高安全性而备受关注，但固态电解质与锂金属之间的界面问题制约了其发展. 本研究通过光催化的可逆失活自由基聚合(RDRP)，将聚乙二醇甲醚甲基丙烯酸酯(PEGMA)、甲基丙烯酸六氟丁酯(HFBMA)和2-溴-3

3-三氟丙烯(BTP)共聚，合成了超支化含氟聚合物(HBPs)，进而与Li

6.4

1.4

0.6

(LLZTO)纳米颗粒复合，制备复合固态电解质(HBPs-LLZTO-SPE). 该电解质在电池循环过程中，能在锂金属表面形成有机-无机杂化的固体电解质界面膜(SEI). 该SEI呈现有机层覆盖顶层，无机相富集底层且被有机相包覆的梯度结构，以实现对锂金属优异的界面稳定性. 将该电解质应用于锂金属电池中，电池在60 ℃下表现出优异的倍率性能和稳定的长期循环性能.

Abstract

Solid-state lithium metal batteries have attracted significant attention due to their high energy density and superior safety. However

their development is hindered by interfacial issues between solid electrolyte and lithium anode. In this work

hyperbranched fluoropolymer (HBPs) was synthesized

via

photocatalyzed reversible deactivation radical polymerization (RDRP)

using a combination of poly(ethylene glycol) methyl ether methacrylate (PEGMA)

4-hexafluorobutyl methacrylate (

HFBMA)

and 2-bromo-3

3-trifluoropropene (BTP). The HBPs was then composited with Li

6.4

1.4

0.6

(LLZTO) nanoparticles to fabricate the composite solid electrolyte (HBPs-LLZTO-SPE). Notably

the electrolyte can form a hybrid organic-inorganic solid electrolyte interphase (SEI) on the lithium metal surface during cycling. The SEI exhibited a gradient structure

characterized by an organic-rich top layer and an inorganic-rich bottom layer where the inorganic phases were encapsulated by an organic matrix. This unique architecture was designed to achieve exceptional interfacial stability with lithium metal. When the electrolyte was applied to lithium metal batteries

the battery showed outstanding rate capability and stable long-term cycling performance at 60 ℃.

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Keywords

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Related Author

Lin-qing Li

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Division of Natural and Applied Sciences Environmental Research Center, Duke Kunshan University, Kunshan

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