Achieving burst Li⁺ channels via quasi-two-dimensional fluorinated metal-organic framework modulating functionalized...

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Lithium metal batteries (LMBs) face challenges with lithium dendrite growth and electrolyte reactions, hindering their practical application.
• A stable artificial solid electrolyte interface (ASEI) is crucial for overcoming these limitations and ensuring battery longevity.

Purpose of the Study:

• To develop a robust ASEI using quasi-two-dimensional fluorinated metal-organic framework carbon (q2D-FcMOF).
• To enhance the interfacial stability and electrochemical performance of lithium metal batteries.

Main Methods:

• Fabrication of q2D-FcMOF for constructing a protective double-layer ASEI.
• Characterization of the ASEI's structure and composition, including organic and inorganic LiF layers.
• Electrochemical testing of symmetrical batteries and cells with commercial cathodes.

Main Results:

• The q2D-FcMOF-based ASEI effectively suppresses lithium dendrite growth and side reactions.
• Symmetrical batteries achieved an ultralong cycle life exceeding 3600 hours.
• Cells demonstrated excellent cyclability under demanding conditions (high-loading, lean-electrolyte, air exposure).

Conclusions:

• The q2D-FcMOF material provides an effective strategy for creating a stable ASEI in LMBs.
• This approach offers a promising pathway for the advancement and commercialization of high-performance lithium metal batteries.