• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Nanotechnology >Poly( 3,4-ethylenedioxythiophene) nanotubes as electrode materials for a high-powered supercapacitor
【24h】

Poly( 3,4-ethylenedioxythiophene) nanotubes as electrode materials for a high-powered supercapacitor

机译：聚（3,4-乙撑二氧噻吩）纳米管作为高功率超级电容器的电极材料

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We report the fast charging/discharging capability of poly(3,4-ethylenedioxythiophene) (PEDOT) nanotubes during the redox process and their potential application to a high-powered supercapacitor. PEDOT nanotubes were electrochemically synthesized in a porous alumina membrane, and their structures were characterized using electron microscopes. Cyclic voltammetry was used to characterize the specific capacitance of the PEDOT nanotubes at various scan rates. A type I supercapacitor (two symmetric electrodes) based on PEDOT nanotube electrodes was fabricated, and its energy density and power density were evaluated by galvanostatic charge/discharge cycles at various current densities. We show that the PEDOT-nanotube-based supercapacitor can achieve a high power density of 25 kW kg(-1) while maintaining 80% energy density (5.6 Wh kg(-1)). This high power capability is attributed to the fast charge/discharge of nanotubular structures: hollow nanotubes allow counter-ions to readily penetrate into the polymer and access their internal surfaces, while the thin wall provides a short diffusion distance to facilitate the ion transport. Impedance spectroscopy shows that nanotubes have much lower diffusional resistance to charging ions than solid nanowires shielded by an alumina template, providing supporting information for the high charging/discharging efficiency of nanotubular structures.
机译：我们报告了氧化还原过程中的聚（3,4-乙撑二氧噻吩）（PEDOT）纳米管的快速充电/放电能力及其在大功率超级电容器中的潜在应用。在多孔氧化铝膜中电化学合成了PEDOT纳米管，并使用电子显微镜对其结构进行了表征。循环伏安法用于表征各种扫描速率下PEDOT纳米管的比电容。制作了基于PEDOT纳米管电极的I型超级电容器（两个对称电极），并通过恒电流充电/放电循环在各种电流密度下评估了其能量密度和功率密度。我们显示，基于PEDOT纳米管的超级电容器可以实现25 kW kg（-1）的高功率密度，同时保持80％的能量密度（5.6 Wh kg（-1））。这种高功率能力归因于纳米管结构的快速充电/放电：中空纳米管使抗衡离子易于渗透到聚合物中并进入其内表面，而薄壁则提供了较短的扩散距离以促进离子传输。阻抗谱显示，纳米管对氧化铝的屏蔽作用远小于由氧化铝模板屏蔽的固体纳米线对充电离子的扩散阻力，从而为纳米管结构的高充电/放电效率提供了支持信息。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号