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Foldable Solid-State Batteries Enabled by Electrolyte Mediation in Covalent Organic Frameworks.

Dong Guo1, Digambar B Shinde2, Woochul Shin1

  • 1Materials Science and Engineering Program and Texas Materials Institute, The University of Texas at Austin, Austin, TX, 78712, USA.

Advanced Materials (Deerfield Beach, Fla.)
|March 25, 2022
PubMed
Summary
This summary is machine-generated.

Researchers developed a new solid-state electrolyte using a covalent organic framework (COF) that significantly enhances lithium-ion (Li+) conductivity and battery safety. This breakthrough offers a flexible and durable solution for next-generation energy storage devices.

Keywords:
covalent organic frameworksflexible electrolytesfoldable batterieslithium-metal batteriessolid-state batteries

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Polymer Science

Background:

  • Solid-state electrolytes are crucial for safer, high-energy-density batteries.
  • Existing solid polymeric and ceramic electrolytes face challenges in meeting all performance requirements.

Purpose of the Study:

  • To introduce a novel electrolyte-mediated single-Li+ conductive covalent organic framework (COF) as a new class of solid-state Li+ conductors.
  • To overcome limitations of current solid-state electrolytes for improved battery performance and safety.

Main Methods:

  • In situ solidification of a tailored liquid electrolyte within COF channels.
  • Utilizing crystal soldering to eliminate defects and enhance Li+ mobility.
  • Developing ultrathin COF membranes for battery applications.

Main Results:

  • Achieved a 100-fold increase in Li+ conductivity at room temperature.
  • Demonstrated a high Li+ transference number of 0.85.
  • Created fortified, ultrathin COF membranes exhibiting mechanical toughness.

Conclusions:

  • The developed COF-based solid-state electrolyte significantly enhances Li+ conductivity and battery safety.
  • This new material category offers a promising pathway for foldable solid-state batteries.
  • The electrolyte-mediated approach provides a versatile strategy for designing advanced solid-state conductors.