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Controllable laser-processing-mediated tuning of micro-protrusion arrays on current collectors for high-performance
Jiang Liu1,2,3, Xiaofei Sun1,2,3, Quansheng Li1,2
1State Key Laboratory for Manufacturing System Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China. xfsunxjtu@mail.xjtu.edu.cn.
Summary
A novel micro-protrusion array structure enhances battery performance by increasing electrode material loading and improving ion diffusion. This design boosts battery cycling efficiency and electrolyte wettability for better energy storage.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Improving electrode performance is crucial for advanced energy storage devices.
- Current electrode designs face limitations in loading density and ion transport.
- Micro-scale engineering offers potential solutions for enhanced battery functionality.
Purpose of the Study:
- To design and fabricate a novel micro-protrusion array structure with intersecting flow channels.
- To investigate the impact of this structure on electrode loading density, electrolyte wettability, and lithium-ion diffusion.
- To optimize femtosecond laser processing for controlled micro-structure fabrication.
Main Methods:
- Femtosecond laser processing was employed for precise fabrication of micro-protrusion arrays.
- The designed structures feature intersecting flow channels to facilitate fluid and ion transport.
- Characterization techniques were used to evaluate the structural properties and electrochemical performance.
Main Results:
- The micro-protrusion array structure successfully increased the loading density of electrode materials.
- Enhanced electrolyte wettability was observed due to the intricate surface topography.
- Significant improvements in lithium-ion diffusion kinetics were achieved during battery cycling.
Conclusions:
- The novel micro-protrusion array structure offers a promising approach for advanced battery electrode design.
- Femtosecond laser processing enables controlled fabrication of complex microstructures for electrochemical applications.
- This design strategy enhances key battery performance metrics, paving the way for more efficient energy storage solutions.

