摘要
应用化学气相沉积在钽片和不锈钢片表面直接生长碳纳米管阵列(CNTA)制备超级电容器电极,并分别作正、负极组装有机体系扣式电容器.扫描电子显微镜、循环伏安、恒电流充放电和交流阻抗表征、测试材料的微观形貌和电化学性能.结果表明,该电容器可获得高达3.5 V的工作电压,较长的循环寿命,较好的倍率性能.基于CNTA质量的比功率和比能量性能分别为928 kW.kg-1和19 Wh.kg-1.
The carbon nanotube arrays （CNTA） were grown directly on the substrates of Ta and stainless steel by chemical vapor deposition. The button-like supercapacitors were fabricated based the CNTA electrodes. The electrochemical performance of CNTA based supercapacitors presentsed high working voltage （3.5 V）, long cycle life, and good rate capability. The power and energy densities are were 928 kW · kg^-1 and 19 Wh · kg^-1 , respectively （based on the mass of CNTA）.
出处
《电化学》
CAS
CSCD
北大核心
2008年第2期117-120,共4页
Journal of Electrochemistry
基金
国家自然科学基金项目(20633040)
国家“863”计划资助项目(2006AA03Z342,2006AA11A163)资助
关键词
超级电容器
碳纳米管阵列
电化学性能
supercapacitors
carbon nanotube array
electrochemical performance
