Universal F4-Modified Strategy on Metal–Organic Framework to Chemical Stabilize PVDF-HFP as Quasi-Solid-State Electrolyte

Wenhuan Huang*, Shun Wang, Xingxing Zhang, Yifan Kang, Huabin Zhang, Nan Deng, Yan Liang, Huan Pang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Solid-state electrolytes (SSEs) based on metal organic framework (MOF) and polymer mixed matrix membranes (MMMs) have shown great promotions in both lithium-ion conduction and interfacial resistance in lithium metal batteries (LMBs). However, the unwanted structural evolution and the and the obscure electrochemical reaction mechanism among two phases limit their further optimization and commercial application. Herein, fluorine-modified zirconium MOF with diverse F-quantities is synthesized, denoted as Zr-BDC-Fx (x = 0, 2, 4), to assemble high performance quais-solid-state electrolytes (QSSEs) with PVDF-HFP. The chemical complexation of F-sites in Zr-BDC-F4 stabilized PVDF-HFP chains in β-phase and disordered oscillation with enhanced charge transfer and Li transmit property. Besides, the porous confinement and electronegativity of F-groups enhanced the capture and dissociation of TFSI- anions and the homogeneous deposition of LiF solid electrolyte interphase (SEI), promoting the high-efficient transport of Li+ ions and inhibiting the growth of Li dendrites. The superb specific capacities in high-loaded Li.

Original languageEnglish (US)
Article number2310147
JournalAdvanced Materials
Volume35
Issue number52
DOIs
StatePublished - Dec 27 2023

Bibliographical note

Publisher Copyright:
© 2023 Wiley-VCH GmbH.

Keywords

  • fluorine-modified zirconium MOF
  • Li dendrites
  • Li conductivity
  • LiF solid electrolyte interphase
  • quasi-solid-state electrolytes

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering

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