| 碳纳米管电极超大容量离子电容器交流阻抗特性 |
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| 引用本文： | 梁逵,陈艾,冯哲圣,叶芝祥.碳纳米管电极超大容量离子电容器交流阻抗特性[J].物理化学学报,2002,18(4):381-384. |
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| 作者姓名： | 梁逵 陈艾 冯哲圣 叶芝祥 |
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| 作者单位： | 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 |
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| 基金项目： | 国家自然科学基金(50082001)资助项目 |
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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°.
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| 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 |
| 收稿时间： | 2001-08-27 |
| 修稿时间： | 2001年8月27日 |
AC Impedance Analysis of Supercapacitors Utilizing Carbon Nanotube Electrodes |
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| Liang Kui ,Chen Ai Feng Zhe-ShengYe Zhi-Xiang.AC Impedance Analysis of Supercapacitors Utilizing Carbon Nanotube Electrodes[J].Acta Physico-Chimica Sinica,2002,18(4):381-384. |
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| Authors: | Liang Kui Chen Ai Feng Zhe-ShengYe Zhi-Xiang |
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| Institution: | 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 |
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| 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. |
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| Keywords: | AC impedance Carbon nanotube Activated carbon Frequency-response characteristic Supercapacitor |
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