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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
Published on: December 20, 2016
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Fire-Retardant, Stable-Cycling and High-Safety Sodium Ion Battery
Zhuo Yang1,2, Jian He3, Wei-Hong Lai4
1Institute for Carbon Neutralization, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, 325035, China.
Angewandte Chemie (International Ed. in English)
|October 2, 2021
Summary
Researchers developed a non-flammable electrolyte for safer, high-performance sodium ion batteries. This design improves electrode compatibility and enables stable cycling for over 120 cycles with high capacity retention.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Battery safety is a critical challenge for energy storage development, including sodium-ion batteries.
- Non-flammable electrolytes, while enhancing safety, often suffer from poor electrode compatibility and side effects, leading to battery failure.
Purpose of the Study:
- To design a non-flammable electrolyte for high-performance sodium-ion batteries.
- To overcome the limitations of current non-flammable electrolytes, such as poor electrode compatibility and side reactions.
Main Methods:
- Regulating electrolyte solvation structure using hydrogen bonds.
- Optimizing the electrode-electrolyte interphase.
- Testing full pouch cells with sodium vanadium phosphate@hard carbon and Prussian blue@hard carbon electrodes.
Main Results:
- Achieved stable charge-discharge cycling for over 120 cycles.
- Demonstrated a capacity retention of greater than 85%.
- Obtained high cycling Coulombic efficiency of 99.7%.
Conclusions:
- The developed non-flammable electrolyte design enables high-performance sodium-ion batteries.
- The strategy effectively addresses the safety concerns associated with battery electrolytes.
- This approach offers a promising solution for the advancement of safer energy storage devices.
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