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Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
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A Stabilized Li-Metal Anode with a Ti-Based Metal-Organic Framework Electronic Shield.

Wangcong Xu1, Jiaming Cao1, Chu Qi1

  • 1State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.

ACS Applied Materials & Interfaces
|October 25, 2023
PubMed
Summary

Researchers developed a new surface coating for lithium-metal anodes using a metal-organic framework (MOF). This coating effectively prevents lithium dendrite growth, enhancing battery safety and lifespan for commercial applications.

Keywords:
electronic shieldlithium dendriteslithium−sulfur batterymetal−organic frameworksolid electrolyte interphasesurface engineering

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Battery Technology

Background:

  • Lithium-metal anodes offer high energy density but suffer from dendrite growth, limiting commercial use.
  • Developing a stable solid electrolyte interphase (SEI) is crucial for safe and efficient lithium-metal batteries.

Purpose of the Study:

  • To engineer a stable surface layer on lithium metal anodes.
  • To inhibit uncontrolled lithium dendrite formation using a scalable method.

Main Methods:

  • Functionalizing lithium metal surfaces with a metal-organic framework (MOF), specifically MIL-125(Ti).
  • Utilizing in-situ optical microscopy to observe dendrite inhibition.
  • Testing MOF-modified lithium anodes in symmetric cells and with sulfur cathodes.

Main Results:

  • The MIL-125(Ti) MOF layer effectively suppressed lithium dendrite growth.
  • Uniform and dense lithium deposition was achieved due to the MOF's properties.
  • MOF-modified anodes showed a 2000-hour lifespan with low overpotential in symmetric cells.

Conclusions:

  • Surface engineering with MIL-125(Ti) MOF provides a viable strategy for stabilizing lithium-metal anodes.
  • This approach mitigates dendrite issues, paving the way for safer and more durable lithium batteries.