A Fully Amorphous, Dynamic Cross-Linked Polymer Electrolyte for Lithium-Sulfur Batteries Operating at Subzero-Temperatures

Juan Zhang, Jia Chou, Xiao Xi Luo, Yi Ming Yang, Ming Yan Yan, Di Jia, Chao Hui Zhang, Ya Hui Wang, Wen Peng Wang, Shuang Jie Tan, Jun Chen Guo, Yao Zhao, Fuyi Wang, Sen Xin*, Li Jun Wan, Yu Guo Guo*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)

Abstract

Solid-state lithium-sulfur batteries have shown prospects as safe, high-energy electrochemical storage technology for powering regional electrified transportation. Owing to limited ion mobility in crystalline polymer electrolytes, the battery is incapable of operating at subzero temperature. Addition of liquid plasticizer into the polymer electrolyte improves the Li-ion conductivity yet sacrifices the mechanical strength and interfacial stability with both electrodes. In this work, we showed that by introducing a spherical hyperbranched solid polymer plasticizer into a Li+-conductive linear polymer matrix, an integrated dynamic cross-linked polymer network was built to maintain fully amorphous in a wide temperature range down to subzero. A quasi-solid polymer electrolyte with a solid mass content >90 % was prepared from the cross-linked polymer network, and demonstrated fast Li+ conduction at a low temperature, high mechanical strength, and stable interfacial chemistry. As a result, solid-state lithium-sulfur batteries employing the new electrolyte delivered high reversible capacity and long cycle life at 25 °C, 0 °C and −10 °C to serve energy storage at complex environmental conditions.

Original languageEnglish
Article numbere202316087
JournalAngewandte Chemie - International Edition
Volume63
Issue number5
DOIs
Publication statusPublished - 25 Jan 2024
Externally publishedYes

Keywords

  • Interface Stability
  • Li−S Batteries
  • Low-Temperature Performance
  • Solid Electrolyte Interfaces
  • Solid-State Batteries

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