Related Experiment Video
Updated: Aug 24, 2025
05:33
Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
21.8K
Thermally Stable Polymer-Rich Solid Electrolyte Interphase for Safe Lithium Metal Pouch Cells.
Shi-Jie Yang1,2, Nan Yao3, Feng-Ni Jiang3,4
1School of Materials Science & Engineering, Beijing Institute of Technology, Beijing, 100081, China.
Angewandte Chemie (International Ed. in English)
|October 24, 2022
Summary
Researchers developed a new polymer-rich solid electrolyte interphase for lithium metal batteries. This innovation significantly enhances thermal safety, increasing the critical temperature for thermal runaway and improving battery practicability.
Area of Science:
- Materials Science
- Electrochemistry
- Battery Technology
Background:
- Lithium metal batteries offer high energy density but suffer from safety risks due to reactive lithium metal anodes.
- The high reactivity leads to dangerous exothermic reactions, limiting practical applications.
Purpose of the Study:
- To enhance the safety of lithium metal batteries by addressing the reactivity of the lithium anode.
- To develop a novel solid electrolyte interphase (SEI) for improved thermal stability.
Main Methods:
- Engineered a polymer-rich SEI on the lithium anode using unique polymerization sites and increased fluoride substitution.
- The SEI was designed to be fluorine-rich and hydrogen-free for enhanced thermal stability.
Main Results:
- The in situ formed SEI significantly improved the thermal stability of lithium metal batteries.
- The critical temperature for thermal safety in a 1.0 Ah pouch cell increased from 143.2°C to 174.2°C.
- The onset temperature for thermal runaway was raised from 240.0°C to 338.0°C.
Conclusions:
- The novel electrolyte design strategy effectively suppresses exothermic reactions between the lithium anode and electrolytes.
- This advancement paves the way for high-energy-density and thermally safe lithium metal batteries.
