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Building Ohmic Contact Interfaces toward Ultrastable Zn Metal Anodes
Huanyan Liu1, Jian-Gan Wang1, Wei Hua1
1State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Lab of Graphene (NPU), Xi'an, 710072, China.
This study introduces a zinc-metal oxide interface to prevent dendrite growth in aqueous batteries. This breakthrough enhances zinc plating reversibility and battery lifespan for grid-scale energy storage.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Zinc metal anodes are promising for grid-scale aqueous batteries.
- Zinc dendrite growth and side reactions hinder commercialization.
Purpose of the Study:
- To develop a universal zinc-metal oxide Ohmic contact interface model.
- To improve zinc plating/stripping reversibility and suppress side reactions.
Main Methods:
- Demonstrated a Zn-metal oxide Ohmic contact interface model.
- Utilized the work function difference between Zn and metal oxides.
- Investigated CeO2-modified Zn anode and MoS2//Zn full cells.
Main Results:
- Achieved dendrite-free zinc deposition via an interfacial anti-blocking layer.
- Suppressed side reactions using the metal oxide layer as a physical barrier.
- Demonstrated ultrastable durability (>1300 h) and improved Coulombic efficiency.
Conclusions:
- The Ohmic contact interface model effectively enhances zinc anode performance.
- This approach offers a pathway for developing advanced metal battery anodes.
- The findings advance fundamental understanding of interfacial engineering in batteries.
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