摘要：电解铜箔在锂电池内不仅是负极材料的载体，又是负极电子的收集和传输体。为了使电解铜箔表面与锂电池负材料结合能力更强，常采用表面粗化工艺。将铜箔表面进行电化学粗化,即镀上一层锌镍合金，在锌镍合金表面涂覆粘结剂黄原胶、羧甲基纤文素钠，使用多功能摩擦磨损仪进行划痕形貌分析，根据FZ值的大小比较结合能力。结果表明，粗化后的铜箔表面与粘结剂的结合能力更强,并且当涂覆厚度为100微米时，粘结剂5%羧甲基纤文素钠(CMC)结合能力最强；当涂覆厚度为200微米时，粘结剂1%羧甲基纤文素钠(CMC)结合能力最强；当涂覆厚度为300微米时，粘结剂1%黄原胶（XG）结合能力最强。粘结强度越高,可防止充放电循环过程中负极的粉化脱落，从而使得锂电池材料负极性能更加稳定。21862
毕业论文关键词： 电解铜箔；粗化；粘结剂；添加剂；结合力
The Study of the modification of electrochemical coarsening on the surface of the Electrolytic copper foil
Abstract: Copper foil is not only the carrier of the materials in Battery cathode, but also the collection and transfer of negative pole . In order to increase the combining power between the copper foil and the materials in battery cathode, we often use surface coarsening technology .Coarsening the surface on the copper foil by electroplating a zinc-nickel alloy. Xanthan gum and CMC are covered on the surface of the copper foil.Use multi-purpose instrument for friction and wear scratches morphology analysis.Combined with the ability to compare the values based on the size of Fz. The results show that the combining power between the copper foil’s surface and the binder is stronger than before and when the thickness is 100um,the combining power 5% CMC is the strongest;when the thickness is 200um,the combining power 1% CMC is the strongest;when the thickness is 300um,the combining power 1% XG is the strongest,which can prevent the negative from chalking off in the process of the charge-discharge cycle . All above ,the performance of the materials in lithium battery is more stable.
Key words: copper foil ;zinc-nickel alloy;coarsening;binder;combining power
目 录
1 引言 1
1.1 电解铜箔的概述 1
1.2 电解铜箔的发展模式与趋势 2
1.3 电解铜箔的表面处理发展 4
1.4 本课题主要研究内容 4
2 实验原理 6
2.1 扫描电子显微镜 6
2.1.1 扫描电子显微镜的原理 6
2.1.2 扫描电子显微镜的测量装置 6
2.2 粘结剂 6
2.2.1 黄原胶 6
2.2.2 羟甲基纤文素钠 7
2.3 湿膜制备器 7
2.3.1 湿膜制备器原理 7
2.3.2 湿膜制备器涂布步骤 7
2.4 多功能摩擦磨损仪 8
2.4.1 多功能摩擦磨损仪原理 8
2.5 划痕测试仪 8
2.5.1 划痕测试仪测量装置 8
3 实验内容 10
3.1 实验主要的仪器和试剂 10
3.1.1 实验材料 10
3.1.2 实验仪器 10
3.1.3 实验试剂 10
3.1.4 实验材料与装置 11
3.2 工艺流程 11
3.3 前处理 11
3.3.1 电化学除油处理 11
3.3.2 电解铜箔前处理操作步骤 13 电解铜箔表面化学粗化改性工艺研究:http://www.youerw.com/huaxue/lunwen_14267.html