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Scalable fabrication of Solvent-Free composite solid electrolyte by a continuous Thermal-Extrusion process
Zhen Li1, Ammar M Aboalsaud1, Xiaowei Liu1
1Advanced Membranes and Porous Materials Centre, Chemical Engineering Program, Division of Physical Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia.
Journal of Colloid and Interface Science
|July 31, 2022
Summary
Large-scale, solvent-free composite solid-state electrolytes (CSEs) were produced using continuous thermal-extrusion. This method enhances battery safety and durability for next-generation lithium-ion applications.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Composite solid-state electrolytes (CSEs) offer advantages over traditional lithium-ion battery electrolytes.
- Current CSE preparation methods face challenges in scalability and residual solvent issues, impacting safety and performance.
Purpose of the Study:
- To develop a green, scalable, and solvent-free method for preparing CSEs.
- To address safety and interfacial concerns associated with residual solvents in CSEs.
Main Methods:
- A continuous thermal-extrusion process was employed for large-scale CSE membrane fabrication.
- Demonstrated the preparation of a 38.7-meter solvent-free CSE membrane.
Main Results:
- The solvent-free CSE membrane exhibited high tensile strength (3.85 MPa) and excellent electrochemical stability (5.15 V).
- Achieved a satisfactory lithium transference number of 0.495.
- Demonstrated long-term stability (>3700 h) in symmetric lithium cells and maintained 78.1% capacity after 380 cycles in lithium metal batteries.
Conclusions:
- Continuous thermal-extrusion is a viable method for large-scale, solvent-free CSE production.
- Eliminating residual solvents significantly improves CSE mechanical, electrochemical, and long-term stability for advanced batteries.
