不同长度的棒状有序介孔炭的双电层电容性能

刘娜; 余吕强; 陈晓红; 廖丽芳; 周继升; 马兆昆; 宋怀河

不同长度的棒状有序介孔炭的双电层电容性能

北京化工大学化工资源有效利用国家重点实验室, 材料电化学过程与技术北京市重点实验室, 北京 100029

基金项目: 国家自然科学基金(50872006,51272016).

详细信息

作者简介:
刘娜,博士.E-mail:1552881023@qq.com

通讯作者:
宋怀河,教授.E-mail:songhh@mail.buct.edu.cn

中图分类号: TQ127.1⁺1
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- 文章访问数: 495
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- 被引次数: 0
出版历程
- 收稿日期: 2016-05-08
- 录用日期: 2016-06-28
- 修回日期: 2016-06-10
- 刊出日期: 2016-06-28

Electrochemical performance of rod-type ordered mesoporous carbons with different rod lengths for electric double-layer capacitors

State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029

Funds: National Natural Science Foundation of China (50872006, 51272016).

摘要

摘要: 将三嵌段共聚物P123既充当结构导向剂又作为碳源,通过硫酸处理,并采用直接炭化硅/P123复合材料的方法制备出棒状有序介孔炭,避免了传统硬模板法中需要除去昂贵的表面活性剂与反复浸渍的过程。通过改变合成参数,制备出不同长度的、从一微米到几十微米变化的棒状有序介孔炭材料。采用SEM,HR-TEM,XRD与N₂吸脱附等对有序介孔炭材料的形态、结构以及孔特点进行表征,并将其作为双电层电容器的电极材料进行电化学测试,以期关联形貌、结构(尤其是棒长度)与其电化学性能的关系。结果表明在这些炭材料中,最长的介孔炭具有最高的比容量170 F/g。在2000 mA/g电流密度下,具有双孔径的介孔炭表现出最高的容量保持率(92%)。
- 有序介孔炭 /
- 棒状 /
- 模板 /
- 三嵌段共聚物 /
- 超级电容器
Abstract: Rod-type ordered mesoporous carbons were synthesized by the direct carbonization of sulfuric-acid-treated silica/triblock copolymer composites, followed by etching the silica with a HF solution. The morphologies, microstructures and pore structures of the mesoporous carbons were investigated by scanning electron microscopy, high resolution transmission electron microscopy, X-ray diffraction and nitrogen sorption. Their electrochemical performance as electrodes for supercapacitors was investigated by impedance spectroscopy and charge/discharge tests. It was found that the rod length of the mesoporous carbons can be changed from one to tens of micrometers by changing the synthesis parameters. The sample with the longest rod length has the highest specific capacitance. The sample with two pore sizes has the highest capacitance retention ratio of 92% at a high current density of 2 A/g.
- Ordered mesoporous carbon /
- Rod-type /
- Template /
- Triblock copolymer /
- Supercapacitor

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