具有高结合力强度的柔性腐蚀铝箔/碳纳米管复合材料的制备和其电化学及散热性能研究  

High peel strength and flexible aligned carbon nanotubes/etched A1 foil composites with boosted supercapacitor and thermal dissipation performances

作　　者：杜娟 康乐 罗英涛 陈开斌 李旺兴[2] 肖劲[3] Du Juan;Kang Le;Luo Yingtao;Chen Kaibin;Li Wangxing;Xiao Jin(Zhengzhou Non-ferrous Metals Research Institute Co.Ltd of CHALCO,Zhengzhou 450041;Aluminum Corporation of China,Beijing 100082;Central South University,Changsha 410083)

机构地区：[1]中铝郑州有色金属研究院有限公司,河南郑州450041 [2]中国铝业股份有限公司,北京100082 [3]中南大学,湖南长沙410083

出　　处：《铝镁通讯》2020年第2期52-58,共7页

摘　　要：本文利用化学气相沉积方法在腐蚀铝箔上制备了与基底结合力较强的破纳米管复合材料。在碳纳米管和腐蚀铝箔表面结合处,非定向的碳纳米管呈缠綫的小球团状埋入腐蚀铝箔表面的微孔中,此特殊的生长结构使生长的破纳米管被牢固的固定在和腐蚀铝箔表面。测试得到的腐蚀铝箔和碳纳米管之间的剥离强度为76.8Nm-1,而生长在光滑铝箔表面的碳纳米管和基底之间的剥离强度仅为53.6Nm-1。制备的腐蚀铝箔/定向破纳米管在TEABF4/AN有机电解液和Na2SO4电解液中的电化学性能測试表明,复合材料具有较低的等效串联电阻和较高的拐点频率(1mol L-1 TEABF4/AN中fknee=858Hz,Rs=0.344 Ω cm-2,0.2 mol L-1 Na2S04中fknee=253Hz,Rs=0.376 Ω cm-2),经过15000圈的充放电循环后仍保持良好的稳定性。以此腐蚀铝箔/碳纳米管为基底制备腐蚀铝箔/碳纳米管/聚苯胺(二氧化锰)复合材料可大大提高复合材料的比容量。将破纳米管/腐蚀铝箔贴在24W LED等背板处,测试得到LED的稳定工作溫度从106.3℃降低到了82.3℃,从30 ℃到82 ℃的升溫速率从O.19℃ s-1降低到了0.04℃s-1。In this woric,aligned carbon nanotubes(ACNTs)were grown on etched Al foil with improved bonding strength by direct thermal chemical vapor deposition(CVD).In the interface of ACNTs adjacent to the etched Al substrate,the ACNTs tangled together as irregularly shaped"tiny twine balls" were embedded in the cavities of the etched Al foil. Such a unique structure generated strong bonding strength between the as-grown ACNTs and etched Al substrate.The minimal changes for the equivalent series resistance and deformation of the ACNT/etched Al foil after bending test demonstrated the good flexibility and structural stability of the as-prepared composite material.This flexible,binder-free ACNTs/etched Al foil composite material exhibited excellent electrochemical and thermal dissipation performances.This work provided a versatile and adaptable method by forming micro-sized and irregularly shaped cavities on different kinds of substrates to grow CNTs with strong peel strength for various practical applications.

关 键 词：定向破纳米管 腐蚀铝箔基底 剥离强度 超级电容器 散热性能 

分 类 号：TB3[一般工业技术—材料科学与工程]