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Deep Eutectic Solvents as Electrolytes for Zn Batteries: Between Blocked Crystallization, Electrochemical Performance
Victor Gregorio1, Christian Baur1, Piotr Jankowski1,2
1Department of Energy Conversion and Storage, Technical University of Denmark, Anker Engelunds vej, Building 301, 2800, Kongens Lyngby, Denmark.
Chemsuschem
|December 26, 2024
Summary
This study explores acetamide-based deep eutectic solvents (DESs) for zinc batteries. Optimized DES mixtures enhance ionic conductivity and battery performance, showing promise for scalable applications.
Area of Science:
- Electrochemistry
- Materials Science
Background:
- Deep eutectic solvents (DESs) are tunable ionic liquid alternatives for energy storage.
- Acetamide-based DESs show potential for zinc (Zn) battery applications.
Purpose of the Study:
- Investigate synergistic mixtures of acetamide-based DESs for enhanced Zn battery performance.
- Optimize ionic conductivity, electrochemical performance, and stability while mitigating corrosion.
Main Methods:
- Formulation of ternary mixtures using two acetamide-based DESs.
- Electrochemical characterization to assess ionic conductivity and battery performance.
- Corrosion analysis of the optimized DES mixtures.
Main Results:
- Ternary DES mixtures exhibited enhanced ionic mobility and conductivity.
- The optimal mixture balanced performance and stability, despite crystallization challenges.
- Demonstrated excellent cycling performance with reduced overpotentials and acceptable corrosion.
Conclusions:
- Optimized acetamide-based DES mixtures offer a promising, scalable pathway for advanced Zn battery technology.
- Addressing crystallization is key for maximizing liquid-phase stability in these DES electrolytes.
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