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[1]郭　畅,郑葛花,张媛媛,等.多孔石墨烯的制备及其在超级电容器中的应用[J].武汉工程大学学报,2019,(02):103-108.[doi:10. 3969/j. issn. 1674?2869. 2019. 02. 001]
　GUO Chang,ZHENG Gehua,ZHANG Yuanyuan,et al.Fabrication of Holey Graphene and Its Application in Supercapacitors[J].Journal of Wuhan Institute of Technology,2019,(02):103-108.[doi:10. 3969/j. issn. 1674?2869. 2019. 02. 001]
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多孔石墨烯的制备及其在超级电容器中的应用(/HTML)
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
期数:
2019年02期
页码:
103-108
栏目:
化学与化学工程
出版日期:
2019-04-18

文章信息/Info

Title:
Fabrication of Holey Graphene and Its Application in Supercapacitors
文章编号:
20190201
作者:
郭　畅; 郑葛花; 张媛媛; 曾　婷*; 万其进*
武汉工程大学化学与环境工程学院，湖北 武汉 430205
Author(s):
GUO Chang;  ZHENG Gehua;  ZHANG Yuanyuan;  ZENG Ting*;  WAN Qijin*
School of Chemistry and Environmental Engineering， Wuhan Institute of Technology， Wuhan 430205， China
关键词:
石墨烯; 超级电容器; 多孔材料; 双电层电容器
Keywords:
graphene;  supercapacitors;  holey materials;  electrical-double-layer capacitor
分类号:
O69
DOI:
10. 3969/j. issn. 1674?2869. 2019. 02. 001
文献标志码:
A
摘要:
采用催化刻蚀法，制备出作为一种大比表面积、高导电性的、已被广泛用作超级电容器的二维碳电极材料。石墨烯的多孔材料由于其多孔结构能够加快离子的扩散，使得比电容进一步增加，增强了其双电层电容性能。多孔还原氧化石墨烯（hrGO），并将其用作超级电容器的电极材料。同时利用透射电子显微镜、X射线电子能谱和电化学技术对制备出的hrGO进行表征。利用循环伏安法和恒电流充放电技术对比了未刻蚀孔的还原氧化石墨烯（rGO）和hrGO的超级电容性能。当电位在-1~0 V范围内时，hrGO的比电容要大于未刻蚀的rGO的比电容，当扫速为10 mV/s时，其比电容可达到33 mF/cm2；当电流密度为0.2 mA/cm2时，hrGO的比电容仍要大于未刻蚀的rGO的比电容，与循环伏安测试中得到的结论一致。在充放电达到3 000次循环后，比电容保持在初始值的87%。上述结果表明该方法制备的多孔石墨烯具有良好的超级电容性能，适用于超级电容器负极材料。
Abstract:
Graphene， a two-dimensional carbon material with large specific surface and high conductivity， has been widely used as electrode material in application of supercapacitors. The porous-feature of graphene-based materials can provide a high-speed ionic diffusion， with a result of the improved specific capacity and property of electrical-double-layer capacity. In this work， the holey reduced graphene oxide （hrGO） were prepared by the catalytic etching method， and served as the electrode in supercapacitors. The synthesized hrGO was characterized by transmission electron microscopy， energy dispersive X-Ray spectroscopy and electrochemical techniques， and the specific capacitances of reduced graphene oxide （rGO） and hrGO were measured by cyclic voltammetry （CV） and the galvanostatic charge-discharge technique （GCD）. The specific capacitance of hrGO is 33 mF/cm2 in the potential range of -1- 0 V， at a scan rate of 10 mV/s， higher than that of rGO. In GCD studies， hrGO shows a better-defined electrical-double-layer behavior than rGO without etching at the current density of 0.2 mA/cm2. The results are consistent with CV results. Then after 3 000 charge-discharge cycles， hrGO still maintains 87% of its initial capacitance. Therefore， the hrGO with excellent supercapacitor performances is expected to be applied as a negative electrode material of supercapacitors.

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备注/Memo

备注/Memo:
收稿日期：2019-01-05基金项目：国家自然科学基金（61701352）作者简介：郭　畅，硕士研究生。E-mail：[email protected]*通讯作者：万其进，教授，博士研究生导师。E-mail：[email protected]；曾　婷，博士，讲师。E-mail：[email protected]引文格式：郭畅，郑葛花，张媛媛，等. 多孔石墨烯的制备及其在超级电容器中的应用［J］. 武汉工程大学学报，2019，41（2）：103-108.
更新日期/Last Update: 2019-04-20