Cui Fandong,Miao Li*.Effect of surface roughness on properties of ultra-thin electrolytic copper foil and its mechanism[J].Plating & Finishing,2023,(6):43-47.[doi:10.3969/j.issn.1001-3849.2023.06.007]
表面粗糙度对超薄电解铜箔性能的影响及机理研究
- Title:
- Effect of surface roughness on properties of ultra-thin electrolytic copper foil and its mechanism
- 分类号:
- TG146.1
- 文献标志码:
- A
- 摘要:
- 超薄电解铜箔为覆铜板、印制电路用铜箔，广泛应用于动力类锂电池、 3C 消费类锂电池及储能锂电池领域。针对原材料及轧辊导致成箔表面粗糙度较大差异的问题，研究了表面粗糙度对高品质超薄电解铜箔性能的影响规律并对机理进行了分析。采用同批次、同工艺、不同轧辊条件下所得铜箔为试样，研究了表面粗糙度对其耐蚀性、耐热性和力学性能的影响，并借助透射电子显微镜对其影响机理进行了分析。结果表明：在同批次、同工艺、不同轧辊条件下，粗糙度有较大差异；表面粗糙度大的铜箔表面易腐蚀，并且在表面粗糙度小的基体上，氯化亚铁会脱落，形成蚀坑，而在表面粗糙度大的基体上，氯化亚铁形成晶粒并镶嵌在基体中；表面粗糙度对耐热性也有影响，表面粗糙度越大，沿晶裂纹越明显，但不是决定因素；表面粗糙度对抗拉性能影响不大，但对其延伸率具有较大的影响；表面粗糙度对性能的影响主要是由于制造过程中铜的面心立方转变成了 l =0 的四方晶体。
- Abstract:
- ： The ultra-thin electrolytic copper foil is used for copper clad laminates and printed circuits ， which is also widely used in the fields of power lithium batteries ， 3C consumer lithium batteries and energy storage lithium batteries. In view of the large difference of surface roughness caused by raw materials and rollers ， the influence of surface roughness on the properties of high-quality ultra-thin electrolytic copper foil was studied and the mechanism was analyzed. The copper foil obtained in the same batch ， the same process and different roller conditions was used as samples to study the effect of surface roughness on the corrosion resistance ， heat resistance and mechanical properties ， and the influence mechanism was analyzed by transmission electron microscopy. The results show that the roughness is quite different under the conditions of the same batch ， the same process and different rolls. The surface of copper foil with large surface roughness is easy to corrode ， and ferrous chloride will fall off on the substrate with small surface roughness to form corrosion pits ， while on the substrate with large surface roughness ， ferrous chloride will form grains and be embedded in the substrate. The surface roughness also has an effect on the heat resistance ， the greater the surface roughness ， the more obvious the intergranular cracks ， but it is not the decisive factor. The surface roughness has little effect on the tensile properties ， but has great influence on the elongation. The influence of surface roughness on the properties is mainly due to the fact that the face-centered cubic crystal of copper is transformed into tetragonal crystal with l =0 during the manufacturing process.
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备注/Memo
收稿日期： 2022-11-10 修回日期： 2022-11-30 作者简介： 崔反东（ 1989 —），男，工学硕士，高级工程师， email ： 178291085@qq.com * 通信作者： 苗莉（ 1978 —），女，工学硕士，副教授， email ： 54412794@qq.com 基金项目： 大学生创新训练项目（ S202213514009X ）?/html>