UiO-66-functionalized Sandwich Composite Separators for Improved Performance and Safety of Lithium-ion Batteries

Wen-Fei Ding; Yu-Xing Liu; Lan Xu

doi:10.1007/s10118-026-3772-9

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UiO-66-functionalized Sandwich Composite Separators for Improved Performance and Safety of Lithium-ion Batteries

RESEARCH ARTICLE | Updated：2026-08-19

- UiO-66-functionalized Sandwich Composite Separators for Improved Performance and Safety of Lithium-ion Batteries
- Chinese Journal of Polymer Science Vol. 44, Pages: 1-14(2026)
- Affiliations：
  
  a.National Engineering Laboratory for Modern Silk, College of Textile and Engineering, Soochow University, Suzhou 215123, China
  b.Jiangsu Engineering Research Center of Textile Dyeing and Printing for Energy Conservation, Discharge Reduction and Cleaner Production (ERC), Soochow University, Suzhou 215123, China
  c.Jiangsu Advanced Textile Engineering Technology Center, Nantong 226007, China
- Author bio：
  
  lanxu@suda.edu.cn
- Funds：
- DOI：10.1007/s10118-026-3772-9
  CLC：
- Received：10 April 2026，
  
  Accepted：05 June 2026，
  
  Online First：19 August 2026，
  
  Published：2026-07
- Accepted：
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Ding, W. F.; Liu, Y. X.; Xu L. UiO-66-functionalized sandwich composite separators for improved performance and safety of lithium-ion batteries. Chinese J. Polym. Sci. https://doi.org/10.1007/s10118-026-3772-9

Wen-Fei Ding, Yu-Xing Liu, Lan Xu. UiO-66-functionalized Sandwich Composite Separators for Improved Performance and Safety of Lithium-ion Batteries[J/OL]. Chinese Journal of Polymer Science, 2026, 441-14.
Ding, W. F.; Liu, Y. X.; Xu L. UiO-66-functionalized sandwich composite separators for improved performance and safety of lithium-ion batteries. Chinese J. Polym. Sci. https://doi.org/10.1007/s10118-026-3772-9 DOI：

Wen-Fei Ding, Yu-Xing Liu, Lan Xu. UiO-66-functionalized Sandwich Composite Separators for Improved Performance and Safety of Lithium-ion Batteries[J/OL]. Chinese Journal of Polymer Science, 2026, 441-14. DOI： 10.1007/s10118-026-3772-9.

摘要

Abstract

Thermal runaway-induced safety issues have seriously hindered further development of lithium-ion batteries (LIBs). As a key component of LIBs

high-performance electrospun nanofiber separators (ENSs) with high-temperature self-closing functions can prevent safety issues caused by thermal runaway in LIBs. In this study

a sandwich-structured high-temperature self-closing polyacrylonitrile/polyurethane//adding cetyltrimethylammonium bromide to the poly(butylene succinate) (PAN/PU//CPBS) ENS (CPC ENS) was efficiently fabricated using free-surface electrospinning technology

via

material selection and structural design. A high-melting-point polyacrylonitrile-based ENS served as the intermediate layer

providing its thermal stability

while a low-melting-point polybutylene succinate-based ENS served as the outer layer

endowing it with a high-temperature self-closing function. To enhance its performance

CPC ENS was modified with polydopamine and loaded with porous structured UiO-66 rich in active sites

resulting in a high-performance self-closing UiO66@PDA@CPC ENS. The results showed that UiO66@PDA@CPC ENS had an excellen

t electrolyte uptake rate (740.7%±20.6%) and wettability (8.3°±0.3°)

while maintaining good thermal stability at 160 °C. Furthermore

after 100 cycles at 0.5 C

the assembled battery maintained a discharge specific capacity of 139.6 mAh/g

with a capacity retention rate of 92.4%. Meanwhile

the surface of the lithium sheet had a flat morphology

indicating that UiO66@PDA@CPC ENS had superior long-term cycling stability

thus demonstrating its enormous potential as a high-performance and safe LIB separator.

关键词

Keywords

references

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