浆料涂敷法制备的低电阻铝/碳复合箔界面结构及其性能  

Micro-structure and performance of low resistance aluminum/carbon composite foil prepared by resin pyrolysis

作　　者：李荐[1,2] 黄祖琼[1] 姚建军 周宏明[1,2] 杨振江 黄玉明 

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083 [2]湖南省正源储能材料与器件研究所,湖南长沙410083 [3]南通江海电容器股份有限公司,江苏南通226361

出　　处：《中南大学学报（自然科学版）》2013年第12期4793-4798,共6页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(51371198)

摘　　要：采用先预涂敷含碳浆料再热解的方法制备一种碳层厚度<10μm、界面结合良好、表面电阻率低至9.75×10-8?·m的铝/碳复合箔。通过电阻测试仪、扫描电镜、XRD和透射电镜等方法对铝/碳复合箔的表面电阻、表面及界面的微观结构和相组成进行研究,并探讨以其作为阴极箔对固体铝电解电容器容量和电阻的影响。研究结果表明:铝/碳复合箔的碳层表面孔隙发达,碳层与铝箔结合紧密,二者的界面处生成Al4C3,形成了良好的冶金结合;以铝/碳复合箔作为阴极箔制造电压为4 V和电容为(560±20)μF的固体铝电解电容器,电容达到565μF,等效串联电阻为4.5 m?,损耗为1.05%,而同规格普通腐蚀阴极箔的固体铝电解电容器的电容为420μF,等效串联电阻为7.4 m?,损耗为30%,铝/碳复合箔作为阴极箔性能更优。Al/C composite foil of less than 10 gm thickness carbon layer with excellent interfacial bonding and sheet resistivity of 9.75×10-8Ω.m was prepared by resin pyrolysis. Its microstructure, phase composition and interracial structure were systematically investigated by using scanning electron microscope （SEM）, X-ray diffraction （XRD） and transmission electron microscope （TEM）, respectively. The effect of Al/C composite foil on solid aluminum electrolytic capacitor as cathode collector was studied. The results show that Al/C composite foil has dense cross section structure and porous surface structure. The generation of Al4C3 in Al/C composite foil is confirmed by XRD pattern. Rectangular Al4C3 needle is observed to grow in the interface between carbon layer and aluminum foil by TEM, which strengthens the interracial bond of carbon layer and aluminum foil. The prepared AI/C composite foil is used as cathode foil of solid-aluminum electrolytic capacitor with designed voltage of 4V and designed capacity of （560 ±20） μF, resulting in capacity of 565 μF, equivalent series resistance （ESR） of 4.5 mΩ, dissipation factor （DF） of 1.05%, while the same performance parameter for solid aluminum electrolytic capacitor made by common etched aluminum foil are 420 μF of capacity, 7.4 mΩ of ESR, 30% of DF. The Al/C composite foil show better performance than etched aluminum foil as cathode foil.

关 键 词：铝 碳复合箔 集流体 AL4C3 冶金结合 碳涂层 

分 类 号：TB333[一般工业技术—材料科学与工程]