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首页> 外文期刊>Journal of Materials Research >A method to obtain a Ragone plot for evaluation of carbon nanotube supercapacitor electrodes
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A method to obtain a Ragone plot for evaluation of carbon nanotube supercapacitor electrodes

机译：一种获得Ragone图以评估碳纳米管超级电容器电极的方法

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摘要

Electrochemical double layer capacitors, also referred to as supercapacitors, are a promising technology in the field of energy storage. Carbon nanotube (CNT)-based supercapacitors are particularly interesting because of CNTs' high surface area and conductivity. CNT supercapacitors can potentially be used in hybrid electric vehicles due to their higher power density. Comparing energy storage systems that store energy in different ways, such as batteries, fuel cells, supercapacitors, and flywheels, requires that an appropriate set of performance data be collected. A Ragone plot is a log-log plot of a device's energy density versus power density, giving insight into its operational range. A method to obtain Ragone plots for CNT-based supercapacitors in a three-terminal electrochemical cell was adapted from a technique to test commercial capacitors for electric vehicles. Ragone plots for different types of as-grown CNT electrodes in different electrolytes are presented, along with the procedural details of this new method to obtain electrode-specific energy and power densities. Additionally, a theoretical weight calculation for a carbon nanotube film was derived and validated with a direct weight measurement of a CNT film. This weight was used in the specific energy and power densities for the Ragone plot.
机译：电化学双层电容器，也称为超级电容器，在能量存储领域是有前途的技术。基于碳纳米管（CNT）的超级电容器特别有趣，因为CNT的表面积和导电率高。 CNT超级电容器因其较高的功率密度而潜在地可用于混合动力电动汽车。比较以不同方式存储能量的能量存储系统（例如电池，燃料电池，超级电容器和飞轮），需要收集一组适当的性能数据。 Ragone图是设备能量密度与功率密度的对数对数图，可深入了解其工作范围。一种用于获得三端电化学电池中基于CNT的超级电容器的Ragone图的方法，适用于测试用于电动汽车的商用电容器的技术。给出了在不同电解质中不同类型的已生长CNT电极的Ragone图，以及此新方法的程序细节，以获得电极特定的能量和功率密度。另外，得出了碳纳米管薄膜的理论重量计算，并通过直接测量CNT薄膜的重量进行了验证。该权重用于Ragone图的比能量和功率密度。

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  • 来源
    《Journal of Materials Research》 |2010年第8期|P.1500-1506|共7页
  • 作者

    Akshay S. Raut; rnCharles B. Parker; rnJeffrey T. Glass;

  • 作者单位

    Electrical and Computer Engineering Department, Duke University, Durham, North Carolina 27708;

    rnElectrical and Computer Engineering Department, Duke University, Durham, North Carolina 27708;

    rnElectrical and Computer Engineering Department, Duke University, Durham, North Carolina 27708;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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