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Ion-Conducting Dynamic Solid Polymer Electrolyte Adhesives.

Ryo Kato1,2, Priyadarshini Mirmira1,3, Arvin Sookezian2,3

  • 1Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States.

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|June 1, 2022
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Summary
This summary is machine-generated.

New dynamic polymer electrolytes with disulfide bonds offer enhanced ion transport and strong adhesion. These materials show potential for use in solid polymer electrolyte adhesives, even after repeated use.

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Electrochemistry

Background:

  • Developing advanced polymer electrolytes is crucial for next-generation energy storage devices.
  • Combining ion transport with adhesive properties in a single material presents a significant challenge.
  • Structurally dynamic polymer networks offer unique possibilities for tunable material properties.

Purpose of the Study:

  • To synthesize and characterize cross-linked polymer electrolytes featuring dynamic disulfide bonds.
  • To investigate the combined ion transport and adhesive capabilities of these dynamic polymer networks.
  • To evaluate the performance of these materials as solid polymer electrolyte adhesives.

Main Methods:

  • Synthesis of dynamic network polymers via thiol oxidation of bisthiol and tetrathiol monomers.
  • Incorporation of lithium bis(trifluoromethane-sulfonyl-imide) (LiTFSI) salt for ionic conductivity measurements.
  • Evaluation of ionic conductivity (σ) and lap shear adhesion strength under various conditions (temperature, external stimuli, debonding cycles).

Main Results:

  • Achieved ionic conductivities up to 1 × 10-4 S/cm at 90 °C.
  • Observed enhanced ion transport above 90 °C in dynamic networks compared to nondynamic counterparts, attributed to disulfide bond dissociation.
  • Demonstrated significantly higher adhesive shear strength (0.2 MPa) for dynamic networks versus nondynamic ones (0.03 MPa), with stable performance over multiple cycles.

Conclusions:

  • Structurally dynamic polymer electrolytes with disulfide bonds exhibit promising combined ion transport and adhesive properties.
  • The dynamic nature of the network enhances ion mobility at elevated temperatures.
  • These materials are viable candidates for solid polymer electrolyte adhesives due to their strength, stability, and recyclability.