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Updated: Jul 3, 2025

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
Published on: December 20, 2016
A "solo-solvent de novo liquid-phase" method for synthesizing sulfide solid electrolyte Li6PS5Cl
Xinyu Wang1, Shijie Xu1, Aiguo Han1
1Institute of Molecular Plus, Department of Chemistry, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China. revned_yang@tju.edu.cn.
We developed a new liquid-phase synthesis for Li6PS5Cl, a key sulfide electrolyte for solid-state lithium batteries. This method uses tetrahydropyrrole for in situ precursor synthesis from inexpensive materials.
Area of Science:
- Materials Science
- Electrochemistry
- Chemical Synthesis
Background:
- All-solid-state lithium batteries require advanced electrolytes for improved safety and performance.
- Sulfide electrolytes, such as Li6PS5Cl, are promising due to their high ionic conductivity.
Purpose of the Study:
- To develop an efficient and scalable synthesis method for Li6PS5Cl.
- To enable the use of cost-effective and stable precursors for electrolyte synthesis.
Main Methods:
- A novel "solo-solvent de novo liquid-phase" synthesis approach was employed.
- Tetrahydropyrrole was utilized to facilitate in situ synthesis of lithium sulfide (Li2S).
Main Results:
- Successfully synthesized the highly-favored sulfide electrolyte Li6PS5Cl.
- The method utilizes inexpensive and air-stable lithium chloride and sodium sulfide precursors.
Conclusions:
- The reported method offers a viable pathway for the cost-effective production of Li6PS5Cl.
- This advancement supports the development of next-generation all-solid-state lithium batteries.
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