Eutectic-Based Polymer Electrolyte with the Enhanced Lithium Salt Dissociation for High-Performance Lithium Metal Batteries

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

11 Scopus Citations
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Author(s)

  • Dechao Zhang
  • Yuxuan Liu
  • Zhaoyu Sun
  • Zhengbo Liu
  • Xijun Xu
  • And 4 others
  • Lei Xi
  • Shaomin Ji
  • Min Zhu
  • Jun Liu

Detail(s)

Original languageEnglish
Article numbere202310006
Journal / PublicationAngewandte Chemie - International Edition
Volume62
Issue number44
Online published13 Sept 2023
Publication statusPublished - 26 Oct 2023
Externally publishedYes

Abstract

The deployment of lithium metal anode in solid-state batteries with polymer electrolytes has been recognized as a promising approach to achieving high-energy-density technologies. However, the practical application of the polymer electrolytes is currently constrained by various challenges, including low ionic conductivity, inadequate electrochemical window, and poor interface stability. To address these issues, a novel eutectic-based polymer electrolyte consisting of succinonitrile (SN) and poly (ethylene glycol) methyl ether acrylate (PEGMEA) is developed. The research results demonstrate that the interactions between SN and PEGMEA promote the dissociation of the lithium difluoro(oxalato) borate (LiDFOB) salt and increase the concentration of free Li+. The well-designed eutectic-based PAN1.2-SPE (PEGMEA: SN=1: 1.2 mass ratio) exhibits high ionic conductivity of 1.30 mS cm−1 at 30 °C and superior interface stability with Li anode. The Li/Li symmetric cell based on PAN1.2-SPE enables long-term plating/stripping at 0.3 and 0.5 mA cm−2, and the Li/LiFePO4 cell achieves superior long-term cycling stability (capacity retention of 80.3 % after 1500 cycles). Moreover, Li/LiFePO4 and Li/LiNi0.6Co0.2Mn0.2O2 pouch cells employing PAN1.2-SPE demonstrate excellent cycling and safety characteristics. This study presents a new pathway for designing high-performance polymer electrolytes and promotes the practical application of high-stable lithium metal batteries. © 2023 Wiley-VCH GmbH.

Research Area(s)

  • Dendrite-Free, Eutectic Based Polymer Electrolyte, Interface Stability, Solid-State Lithium Metal Batteries

Citation Format(s)

Eutectic-Based Polymer Electrolyte with the Enhanced Lithium Salt Dissociation for High-Performance Lithium Metal Batteries. / Zhang, Dechao; Liu, Yuxuan; Sun, Zhaoyu et al.
In: Angewandte Chemie - International Edition, Vol. 62, No. 44, e202310006, 26.10.2023.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review