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Updated: Aug 6, 2026
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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
Fluorinated Deep Eutectic Gel Electrolytes with Simultaneously Enhanced Mechanical Strength and Ionic Conductivity
Hao Long1,2, Yuhao Liang1,2, Ting He1,2
1Institute For Sustainable Transformation, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China.
Advanced Materials (Deerfield Beach, Fla.)
|July 18, 2026
Summary
Researchers developed a novel gel polymer electrolyte for lithium-metal batteries using competitive hydrogen bonding. This strategy enhances both mechanical strength and ionic conductivity, paving the way for safer, high-performance batteries.
Area of Science:
- Materials Science
- Electrochemistry
- Polymer Chemistry
Background:
- Gel polymer electrolytes for lithium-metal batteries exhibit a trade-off between mechanical strength and ionic conductivity.
- Developing electrolytes with both properties is crucial for battery safety and performance.
Purpose of the Study:
- To design a gel polymer electrolyte with enhanced mechanical strength and ionic conductivity.
- To explore the use of competitive hydrogen-bonding interactions for nanoscale phase separation in electrolytes.
Main Methods:
- In-situ copolymerization of acrylamide and N,N-dimethylacrylamide in a trifluoromethyl-functionalized deep eutectic solvent (TNMA/LiTFSI).
- Formation of an interpenetrating polymer network with distinct polymer-rich domains and ion-conducting channels.
- Characterization of ionic conductivity, Li+ transference number, mechanical properties, and interfacial behavior.
Main Results:
- Achieved ionic conductivity of 2.99 mS cm-1 at 30°C and a Li+ transference number of 0.78.
- Demonstrated remarkable tensile strength of 11.4 MPa with 473% elongation.
- Promoted a LiF-rich interphase, enabling stable Li||Li symmetric cell cycling (>3500 hours) and high-capacity retention in Li|DEG|NCM811 cells (77.5% after 400 cycles).
Conclusions:
- Competitive molecular interactions can be harnessed to create nanoscale phase separation for advanced gel polymer electrolytes.
- The developed deep eutectic gel (DEG) electrolyte offers a promising solution for next-generation lithium-metal batteries.
