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Three-dimensional Ordered Macroporous Flexible Electrode Design toward High-Performance Zinc-Ion Batteries.
Yijie Wang1, Yan Deng1, Ji'ao Liu1
1Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai 200092, P. R. China.
ACS Applied Materials & Interfaces
|February 28, 2024
Summary
Researchers developed an ultrathin, flexible 3D ordered macroporous tin-decorated zinc anode for zinc-ion batteries (ZIBs). This design enhances lifespan and stability, paving the way for advanced flexible electronics.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Flexible zinc-ion batteries (ZIBs) are promising for portable electronics due to safety and cost.
- Electrode design is critical for the performance and longevity of flexible ZIBs.
- Zinc dendrite growth remains a key challenge limiting ZIB lifespan.
Purpose of the Study:
- To develop an ultrathin, flexible anode that mitigates dendrite growth in ZIBs.
- To enhance the cycling stability and energy density of flexible ZIBs.
- To create a high-performance flexible ZIB for practical applications.
Main Methods:
- Fabrication of an ultrathin (60 μm) 3D ordered macroporous (3DOM) Sn@Zn anode.
- Utilizing zincophilic Sn sites to facilitate uniform zinc plating/stripping.
- Development of a flexible 3DOM MnO2/Ni cathode.
- Assembly and testing of the complete flexible ZIB device.
Main Results:
- The 3DOM Sn@Zn anode demonstrated uniform electric field distribution and guided zinc deposition.
- Symmetric cells achieved ultralong cycling performance (2400 h) with low nucleation overpotential (8.9 mV).
- The flexible ZIB (200 μm thick) exhibited high volumetric energy density (11.76 mWh cm⁻³) and stable operation under deformation.
Conclusions:
- The 3DOM Sn@Zn anode effectively suppresses dendrite growth and extends ZIB lifespan.
- The developed flexible ZIB offers high energy density and stable power supply under stress.
- This work provides insights for designing advanced flexible energy storage devices.
