A high-performance three-dimensional micro supercapacitor based on self-supporting composite materials
A high-performance three-dimensional micro supercapacitor based on self-supporting composite materials
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基于自支撑复合材料的高性能三维微型超级电容器
DOI：
10.1016/j.jpowsour.2011.08.007
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发表时间：
2011-12-01
影响因子：
9.2
通讯作者：
Kang, Feiyu
中科院分区：
文献类型：
--
作者：
Shen, Caiwei;Wang, Xiaohong;Kang, Feiyu
介绍了一种硅三维（3D）微型超级电容器，其特点是采用自支撑纳米多孔复合材料和具有高纵横比的数字间电极。开发了一种制备自支撑材料的方法，并研究设计了以活性炭为活性组分的复合材料，以满足足够的比电容、良好的导电性和坚固的结构要求。将所设计的复合材料与微加工技术相结合，实现了具有高纵横比数字间电极的微型超级电容器。利用NaNO3电解液对样品进行了电化学表征，结果表明该3D超级电容器具有优异的综合性能。计算出了90.7 mF cm（-2）的大电容和51.5 mW cm（-2）的快速功率。稳定性强，充放电效率高。此外，本研究还提供了一种采用兼容制造方法构建的可扩展器件，适用于高性能超级电容器片上集成。爱思唯尔B.V.版权所有
This paper introduces a silicon three-dimensional (3D) micro supercapacitor, featured by using self-supporting nano porous composite materials and interdigital electrodes with high-aspect-ratio. A way to prepare self-supporting materials has been developed, and composites that contain an activated carbon as the active component have been studied and designed to meet the requirements for adequate specific capacitance, good conductivity and strong structure. By combining the designed composite with microfabrication techniques, a micro supercapacitor with high-aspect-ratio interdigital electrodes has been achieved. Electrochemical characterization results of the prototype with NaNO3 electrolyte demonstrate that the 3D supercapacitor exhibits an outstanding overall performance. A large capacitance of 90.7 mF cm(-2) and a fast power of 51.5 mW cm(-2) are calculated. Robust stability and high charge/discharge efficiency are also observed. Moreover, this study provides a scalable device built by compatible fabrication method, which is applicable to the integration of high-performance supercapacitors on chip. Crown Copyright (C) 2011 Published by Elsevier B.V. All rights reserved.