Flame-retardant gel polymer electrolyte and interface for quasi-solid-state sodium ion batteries

Guanghai Chen, Kun Zhang, Yiran Liu, Lin Ye*, Yongsheng Gao, Weiran Lin, Huajie Xu, Xinran Wang, Ying Bai, Chuan Wu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

90 Citations (Scopus)

Abstract

Polymer electrolyte is favored in battery research because of its good flexibility, light weight and preferable interfacial contact. However, the development of which is hindered by the low ionic conductivity at room temperature. Herein, a flexible PPEGMA-based gel polymer electrolyte (PGT32-5%) was prepared via in-situ thermal cured technique, plasticized by nonflammable triethyl phosphate and supported by glass fiber. The optimized flame-retardant electrolyte, PGT32-5%, exhibits a high ionic conductivity (0.91 mS cm−1 at 27 °C and a wide electrochemical window (4.8 V). And an artificial interface between polymer and Na metal anode was built to guarantee the superior cycling stability (capacity retention of 91% after 400 cycles) of quasi-solid-state Na3V2(PO4)3|PGT32-5%|Na battery. Further, the interfacial property and effect on discharge behavior were analyzed in depth, which paves the way for designing polymer electrolytes with superior comprehensive performances in future.

Original languageEnglish
Article number126065
JournalChemical Engineering Journal
Volume401
DOIs
Publication statusPublished - 1 Dec 2020

Keywords

  • Flame-retardant
  • Gel polymer electrolyte
  • In-situ thermal cured
  • Interface
  • Quasi-solid-state sodium ion batteries

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