碳纳米管的空气和二氧化碳活化及其对双电层电容器性能的改进  

Activation of Carbon Nanotubes by Air and CO_2 and its Effect on Electric Double Layer Capacitors

作　　者：李辰砂[1] 李贵涛[1] 田秋[2] 张世骥[1] 田丰 王大志[1] 曹茂盛 

机构地区：[1]清华大学,北京100084 [2]哈尔滨工程大学,哈尔滨150001 [3]黑河出入境检验检疫局,黑河164300

出　　处：《材料工程》2004年第2期10-13,17,共5页Journal of Materials Engineering

摘　　要：对碳纳米管粉体在高温下进行空气和二氧化碳活化处理,并用于制作双电层电容器极板。结果显示:空气和二氧化碳活化可以有效的剥离和消除非晶碳,打开缠绕成团的管束和碳管端帽,腐蚀管壁,提高粉体分散性,改变碳纳米管的本征结构,使碳纳米管的比表面积增加。由活化后的碳纳米管制成的双电层电容器的比电容明显提高,等效串联电阻下降,性能得以改进。Carbon Nanotubes (CNTs) were activated by CO2 and air under different durations, then were used in polarizable electrodes of electric double-layer capacitors (EDLCs). Experimental results indicated that air and CO2 activation could modify intrinsic structures and improve dispersity of CNTs. Specific capacitance of EDLCs based on activated CNTs was obviously improved and the equivalent series resistance decreased, but the effects were influenced by duration of activation process.

关 键 词：碳纳米管 活化 双电层电容器 

分 类 号：TB331[一般工业技术—材料科学与工程]