引用本文:[点击复制]
[点击复制]
【打印本页】 【在线阅读全文】【下载PDF全文】 查看/发表评论下载PDF阅读器关闭

←前一篇|后一篇→

过刊浏览    高级检索

本文已被:浏览 1332次   下载 3990 本文二维码信息
码上扫一扫!
石墨烯基气凝胶的制备及其超电容性能研究
阎子峰,吴小中,邢伟
0
(中国石油大学重质油国家重点实验室, 山东青岛266580;中国石油大学重质油国家重点实验室, 山东青岛266580;中国石油大学理学院, 山东青岛266580)
摘要:
采用氧化石墨烯自组装法制备出氧化石墨烯气凝胶(GOA),并采用高温(1100℃)氢气还原进一步制备石墨烯气凝胶(GA)。采用氮气吸附、FT-IR、元素分析和电化学测试等手段对其进行表征。结果表明:制备的两种气凝胶具有较高的BET比表面积(均约为870m2·g-1); GOA表面具有丰富的含氧官能团,GA表面氧含量极低; GOA与GA的碳氧摩尔比分别为1.7和69.9;在低电流密度下(0.2A·g-1),具有高表面官能度的GOA比电容达155.8F·g-1,而低表面官能度的GA表现出高倍率的超电容性能。
关键词:  超级电容器  石墨烯基气凝胶  表面官能度  电极材料  比电容
DOI:10.3969/j.issn.1673-5005.2013.05.027
投稿时间:2013-07-13
基金项目:山东省自然科学杰出青年基金项目(JQ201215)
Preparation of graphene-based aerogels and their supercapacitive performance
YAN Zi-feng,WU Xiao-zhong,XING Wei
(State Key Laboratory of Heavy Oil Processing in China University of Petroleum, Qingdao 266580, China;State Key Laboratory of Heavy Oil Processing in China University of Petroleum, Qingdao 266580, China;College of Science in China University of Petroleum, Qingdao 266580, China)
Abstract:
A self-assembly method was adopted to synthesize graphene oxide aerogel (GOA), which was further reduced by hydrogen at 1100℃ to obtain graphene aerogel (GA). Nitrogen adsorption analysis results show that both aerogels possess high BET surface areas (approximate 870m2·g-1). FT-IR analysis results reveal that the surface of GOA has more oxygen-containing groups than those of GA. Elemental results display that the C/O molar ratios of GOA and GA are 1.7and 69.9, respectively. Electrochemical measurements show that at the current density of 0.2A·g-1, the specific capacitance of GOA with high surface functionalized degree could reach up to 155.8F·g-1, while GA with low surface functionalized degree exhibits a high-rate supercapacitive performance.
Key words:  supercapacitor  graphene-based aerogel  surface functionalized degree  electrode materials  specific capacitance
版权所有 中国石油大学学报(自然科学版)编辑部 Copyright©2008 All Rights Reserved
主管单位:中华人民共和国教育部 主办单位:中国石油大学
地址: 青岛市黄岛区长江西路66号中国石油大学期刊社 邮编:266580 电话:0532-86983496 E-mail: journal@upc.edu.cn
本系统由:北京勤云科技发展有限公司设计