Geometric Accuracy Analysis of Porous Current Collectors for Lithium Ion Batteries Based on Nanosecond Laser

3rd International Symposium on Resource Exploration and Environmental Science

生态环境科学

Li, Kangmei^1 ; Cai, Yu^1 ; Hu, Jun^1

College of Mechanical Engineering, Donghua University, Shanghai, China^1

关键词: Electrodeposited copper;    Geometric accuracy;    Laser repetition frequency;    Method of processing;    Nanosecond lasers;    Porous current collectors;    Processing speed;    Template methods;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/300/4/042123/pdf
DOI  :  10.1088/1755-1315/300/4/042123

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In order to overcome the disadvantages of foam copper, template method and dealloy method in processing porous current collectors for lithium ion batteries, a new method of processing porous current collectors by nanosecond laser is proposed. Microporous fabrication experiment was carried out on the electrodeposited copper foil.The effects of laser repetition frequency and processing speed on the entry diameter, exit diameter, taper and roundness of the micropores were investigated. It is found that the laser repetition frequency has a significant influence on the entry diameter and exit diameter of micropores, but has little effect on the taper and the roundness. Furthermore, it is concluded that high processing speed leads to large roundness but small taper of the micropores. In addition, the variation trend of the entry diameter and exit diameter is complex because of the plasma shielding effect.