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Synergistic Anion-Cation Chemistry Enables Highly Stable Zn Metal Anodes
Yanqun Lv1, Chenyue Huang1, Ming Zhao1
1College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, P. R. China.
Journal of the American Chemical Society
|March 4, 2025
Summary
Ionic liquids in aqueous electrolytes significantly boost zinc metal battery performance. This study reveals how synergistic anion-cation interactions create a protective interphase, enabling long-lasting, high-performance batteries.
Area of Science:
- Electrochemistry
- Materials Science
- Energy Storage
Background:
- Aqueous electrolytes with ionic liquids (ILs) improve zinc metal battery (ZMB) performance.
- Mechanisms of IL anion and cation influence on ZMBs are not well understood.
Purpose of the Study:
- To introduce a novel electrolyte design using halogen-based ILs.
- To elucidate the synergistic anion-cation chemistry mechanism in ZMBs.
Main Methods:
- Utilized a halogen-based ionic liquid in an aqueous electrolyte.
- Investigated the formation of the electrical double layer (EDL) and interphase.
- Analyzed Zn anode corrosion and Zn deposition.
Main Results:
- Synergistic anion-cation interactions formed a halide-rich inorganic interphase.
- Mitigated Zn anode corrosion and promoted dense Zn deposition.
- Achieved high reversibility (99.74%) and ultralong cycle life (20,000 cycles).
Conclusions:
- The novel electrolyte strategy combines EDL and interphase mechanisms for enhanced ZMB performance.
- Demonstrated a new approach for designing high-performance ZMB electrolytes.
- The findings offer significant improvements for rechargeable zinc batteries.
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