物理化学学报 >> 2002, Vol. 18 >> Issue (04): 381-384.doi: 10.3866/PKU.WHXB20020420

研究简报 上一篇    

碳纳米管电极超大容量离子电容器交流阻抗特性

梁逵;陈艾;冯哲圣;叶芝祥   

  1. 四川工业学院材料科学与工程系,成都　610039；电子科技大学信息材料工程学院,成都　610054；成都信息工程学院地球环境科学系,成都　610041
  • 收稿日期:2001-08-27 修回日期:2001-12-04 发布日期:2002-04-15
  • 通讯作者: 梁逵 E-mail:kliang@263.net

AC Impedance Analysis of Supercapacitors Utilizing Carbon Nanotube Electrodes

Liang Kui;Chen Ai;Feng Zhe-Sheng;Ye Zhi-Xiang   

  1. Department of Materials Science ＆ Engineering,Sichuan University of Science ＆ Technology,Chengdu　610039;Institute of Information Materials Engineering,University of Electronic Science ＆ Technology of China,Chengdu　610054;Department of Earth Environment Science,Chengdu Institute of Information Engineering,Chengdu　610041
  • Received:2001-08-27 Revised:2001-12-04 Published:2002-04-15
  • Contact: Liang Kui E-mail:kliang@263.net

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摘要： 采用碳纳米管作为超大容量离子电容器的电极材料,应用交流阻抗频谱法,研究了超大容量离子电容器的频率响应特性.结果表明,用碳纳米管块作电极,超大容量离子电容器在频率250 mHz以下出现“电荷饱和”；而用活性炭块作电极, 超大容量离子电容器在频率为100 mHz时仍未出现“电荷饱和”,这说明碳纳米管电极超大容量离子电容器的频率响应特性优于活性炭电极超大容量离子电容器的频率响应特性.上述两类超大容量离子电容器的阻抗谱中均出现倾角约为45°的直线段,其相位角均远小于理想电容器的相位角90°.

关键词: 交流阻抗谱, 碳纳米管, 活性炭, 频率响应特性, 超大容量离子电容器

Abstract: AC impedance analysis is employed to study frequencyresponse characteristics of supercapacitors utilizing carbon nanotube and activated carbon block electrodes.Charge saturation for carbon nanotube occurs at about 250 mHz,but that of activated carbon is not observed in the frequency range of 100 mHz to 100 kHz.There is a 45° line in the complex plane plot of each supercapacitor utilizing both carbon nanotube or activated carbon electrodes. Phase angles of supercapacitors with both kinds of electrodes are far smaller than 90° of pure capacitors.

Key words: AC impedance, Carbon nanotube, Activated carbon, Frequencyresponse characteristic, Supercapacitor