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Highly Reversible and Anticorrosive Zn Anode Enabled by a Ag Nanowires Layer
Zhe Li1, Hua Wang1, Yun Zhong1
1State Key Laboratory of Material Processing and Die & Mold Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China.
ACS Applied Materials & Interfaces
|February 8, 2022
Summary
A novel silver nanowire (AgNWs) layer effectively suppresses zinc dendrite growth in aqueous batteries. This AgNWs coating enhances anode stability and reversibility, paving the way for safer, long-lasting energy storage solutions.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Aqueous Zn-based batteries offer safe, cost-effective, and eco-friendly energy storage.
- Zinc metal anodes have high capacity but suffer from dendrite growth, limiting practical use.
Purpose of the Study:
- To develop a highly reversible and anticorrosive zinc anode for aqueous rechargeable batteries.
- To mitigate zinc dendrite formation and improve battery lifespan.
Main Methods:
- Coating zinc anodes with a silver nanowire (AgNWs) layer.
- Investigating Zn deposition behavior on the AgNWs surface.
- In situ alloy formation and protective layer characterization.
- Electrochemical testing of Zn-AgNWs anodes and full cells.
Main Results:
- The AgNWs layer effectively suppressed zinc dendrite growth, ensuring uniform deposition.
- Lowered nucleation overpotential and increased surface area facilitated reversible Zn plating/stripping.
- In situ formed AgZn3 alloy acted as a protective layer against electrolyte corrosion.
- The Zn-AgNWs|MnO2 full cell demonstrated high capacity, excellent rate capability, and long-term cycling stability (800 cycles at 0.6 A g-1).
Conclusions:
- The AgNWs-coated zinc anode significantly enhances the performance and stability of aqueous rechargeable batteries.
- This approach offers a promising strategy for developing practical and high-performance zinc-based energy storage systems.
