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Updated: Jun 23, 2025
Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
Published on: December 20, 2016
Electrolyte Engineering via Fluorinated Siloxane Solvent for Achieving High-Performance Lithium-Metal Batteries
Gaoxu Huang1, Yaqi Liao2, Honghao Liu1
1Lab of Low-Dimensional Materials Chemistry, Key Laboratory for Ultrafine Materials of Ministry of Education, Frontier Science Center of the Materials Biology and Dynamic Chemistry, Shanghai Engineering Research Center of Hierarchical Nanomaterials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China.
A novel fluorinated siloxane solvent enhances lithium-metal battery electrolytes, improving ionic conductivity and electrode compatibility for stable, high-performance energy storage. This advanced electrolyte enables long-lasting lithium-metal full cells.
Area of Science:
- Electrochemistry
- Materials Science
- Energy Storage
Background:
- High-performance lithium-metal batteries (LMBs) require advanced electrolytes with high ionic conductivity, wide electrochemical windows, and excellent electrode compatibility.
- Achieving stable electrode/electrolyte interfaces and uniform lithium deposition is critical for LMB longevity and safety.
Purpose of the Study:
- To develop an advanced electrolyte formulation for high-performance lithium-metal batteries.
- To investigate the role of a fluorinated siloxane cosolvent in enhancing electrolyte properties and interfacial stability.
Main Methods:
- Formulation of a novel electrolyte using 3,3,3-trifluoropropyltrimethoxysilane (TFTMS) as a cosolvent with 1,2-dimethoxyethane (DME) and fluoroethylene carbonate (FEC).
- Electrochemical characterization including ionic conductivity, electrochemical window, and Li+ transfer number measurements.
- Evaluation of Li stripping/plating reversibility and cycling stability in Li-metal symmetric cells and practical NCM811|Gr pouch cells.
Main Results:
- The TFTMS-based electrolyte demonstrated high oxidation stability, superior Li+ conductivity, and an enhanced Li+ transfer number.
- High Li stripping/plating reversibility (approximately 99%) and prolonged cycling stability (1400 hours) were achieved.
- An industrial 4 Ah NCM811|Gr pouch cell exhibited comparable cycling performance to commercial carbonate electrolytes.
Conclusions:
- Fluorinated siloxane solvents, specifically TFTMS, are effective in creating advanced electrolytes for high-performance lithium-metal batteries.
- The developed electrolyte promotes stable interfacial chemistry, homogeneous lithium deposition, and accelerated reaction kinetics.
- This research offers a promising strategy for designing next-generation electrolytes for advanced energy storage applications.
