High Ionic Conductive, Mechanical Robust Solid Polymer Composite Electrolyte Achieved by Succinonitrile and Polytetrafluoroethylene Porous Fibrous Membrane for Lithium Metal Batteries

Shuai-Jun Chen; Biao Huang; Li-Xin Song; Zha Wang; Ping-Fan Du; Jie Xiong; Hai-Lin Zhu; Yu-Hai Guo

doi:10.1007/s10118-025-3515-3

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High Ionic Conductive, Mechanical Robust Solid Polymer Composite Electrolyte Achieved by Succinonitrile and Polytetrafluoroethylene Porous Fibrous Membrane for Lithium Metal Batteries

RESEARCH ARTICLE | Updated：2026-01-30

- High Ionic Conductive, Mechanical Robust Solid Polymer Composite Electrolyte Achieved by Succinonitrile and Polytetrafluoroethylene Porous Fibrous Membrane for Lithium Metal Batteries
- Chinese Journal of Polymer Science Vol. 44, Issue 2, Pages: 352-360(2026)
- Affiliations：
  
  State Key Laboratory of Bio-based Fiber Materials, Zhejiang Sci-Tech University, Hangzhou 310018, China
- Author bio：
  
  lxsong12@zstu.edu.cn (L.X.S.)
  gyh@zstu.edu.cn (Y.H.G.)
- Funds：
- DOI：10.1007/s10118-025-3515-3
  CLC：
- Received：04 August 2025，
  
  Accepted：25 November 2025，
  
  Online First：19 January 2026，
  
  Published：05 February 2026
- Accepted：
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Chen, S. J.; Huang, B.; Song, L. X.; Wang, Z.; Du, P. F.; Xiong, J.; Zhu, H. L.; Guo, Y. H. High ionic conductive, mechanical robust solid polymer composite electrolyte achieved by succinonitrile and polytetrafluoroethylene porous fibrous membrane for lithium metal batteries. Chinese J. Polym. Sci. 2026, 44, 352–360

Shuai-Jun Chen, Biao Huang, Li-Xin Song, et al. High Ionic Conductive, Mechanical Robust Solid Polymer Composite Electrolyte Achieved by Succinonitrile and Polytetrafluoroethylene Porous Fibrous Membrane for Lithium Metal Batteries[J]. Chinese Journal of Polymer Science, 2026, 44(2): 352-360.
Chen, S. J.; Huang, B.; Song, L. X.; Wang, Z.; Du, P. F.; Xiong, J.; Zhu, H. L.; Guo, Y. H. High ionic conductive, mechanical robust solid polymer composite electrolyte achieved by succinonitrile and polytetrafluoroethylene porous fibrous membrane for lithium metal batteries. Chinese J. Polym. Sci. 2026, 44, 352–360 DOI： 10.1007/s10118-025-3515-3.

Shuai-Jun Chen, Biao Huang, Li-Xin Song, et al. High Ionic Conductive, Mechanical Robust Solid Polymer Composite Electrolyte Achieved by Succinonitrile and Polytetrafluoroethylene Porous Fibrous Membrane for Lithium Metal Batteries[J]. Chinese Journal of Polymer Science, 2026, 44(2): 352-360. DOI： 10.1007/s10118-025-3515-3.

摘要

A high-performance solid-state electrolyte was prepared

via

solution casting based on polytetrafluoroethylene (PTFE) fibrous membrane. Li symmetric cells achieved stable 2500 h cycling at 0.15 mA·cm

–2

while full cells retained 91.6% capacity after 300 cycles at 0.5 C with CE

99.9%.

Abstract

Solid polymer electrolytes (SPEs) are considered promising candidates for all-solid

-state lithium metal batteries because of their easy preparation and good compatibility with lithium metal. However

their applications are restricted by their low ionic conductivity and poor mechanical properties. In this study

a composite solid polymer electrolyte composed of poly(ethylene oxide) (PEO)

poly(vinylidene fluoride-

-hexafluoropropylene) (PVDF-HFP)

plasticizer succinonitrile (SN)

and polytetrafluoroethylene (PTFE) fibrous porous membranes was prepared. The PTFE fibrous membrane significantly enhanced the mechanical strength of the electrolyte as a supporting framework. SN reduced the crystalline regions of PEO and facilitated rapid lithium-ion transport. PVDF-HFP promoted lithium salt dissolution and improved the electrochemical stability of the electrolyte. Accordingly

the optimized PTFE/PEO/PVDF-HFP/SN polymer electrolyte exhibited a tensile strength of 3.31 MPa at 352% elongation and demonstrated an ionic conductivity of 7.6×10

–4

S·cm

–1

at 60 °C. Lithium symmetric cells maintained stable cycling for over 2500 h at 0.15 mA·cm

–2

and Li//LiFePO

full cells showed a high capacity retention of 91.6% after 300 cycles at 0.5 C

with coulombic efficiency consistently exceeding 99.9% throughout cycling.

关键词

Keywords

references

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