Interface-Engineered Strategy on Metal-Organic Framework to Chemical Stabilize PVDF-HFP as Self-Healing High-Voltage
Lei Wang1, Zhangyuan Wang1, Zhipeng Su1
1School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, 200037, China.
Small (Weinheim an Der Bergstrasse, Germany)
|August 16, 2025
Summary
Interface engineering enhances polymer-MOF interactions in quasi-solid-state electrolytes for improved lithium metal battery performance and stability.
Area of Science:
- Materials Science
- Electrochemistry
- Polymer Chemistry
Background:
- Metal-organic framework (MOF) fillers improve lithium metal battery performance.
- Poor interfacial interactions between polymers and MOFs hinder battery optimization.
Purpose of the Study:
- To develop an interface engineering strategy for enhanced polymer-MOF interactions.
- To improve the electrochemical properties and stability of lithium metal batteries.
Main Methods:
- Preparation of a self-healing PVDF-HFP/graphene oxide/UiO-66/Borate bond (PGUB) quasi-solid-state electrolyte (QSSE).
- Utilizing synergistic effects of boric acid bonds and graphene oxide to enhance polymer-MOF interactions.
- Employing density functional theory (DFT) calculations to investigate charge transfer and ion transport mechanisms.
Main Results:
- The PGUB QSSE demonstrated an expanded electrochemical window (5.06 V) and fast Li+ transport channels.
- Enhanced mechanical flexibility (205% elongation at break) and thermal stability (200 °C) were achieved.
- High capacity retention (95.46% after 500 cycles) and effective dendrite suppression were observed.
Conclusions:
- The proposed interface engineering strategy significantly enhances the electrochemical performance of lithium metal batteries.
- The developed PGUB QSSE offers a promising solution for next-generation high-energy batteries.
- Molecular-level interface control is crucial for advancing battery technology.
