N掺杂三维石墨烯的制备及电化学性能

doi:10.3969/j.issn.1000-1565.2017.05.007

河北大学学报(自然科学版) ›› 2017, Vol. 37 ›› Issue (5): 483-488.DOI: 10.3969/j.issn.1000-1565.2017.05.007

N掺杂三维石墨烯的制备及电化学性能

王艳素,詹亚利,严喜样

收稿日期:2016-12-14 出版日期:2017-09-25 发布日期:2017-09-25
作者简介:王艳素(1979—),女,河北易县人,河北大学副教授,主要从事超级电容器碳基电极材料制备和表征及相关技术研究. E-mail:yansuchengwu@163.com
基金资助:
河北省自然科学基金资助项目(B2014201024)

Preparation of N doped three dimensional graphene and its electrochemical performance

WANG Yansu, ZHAN Yali, YAN Xiyang

College of Chemistry and Environmental Science, Hebei University, Baoding 071002, China

Received:2016-12-14 Online:2017-09-25 Published:2017-09-25

摘要/Abstract

摘要： 为探究更绿色环保的三维还原氧化石墨烯的制备方法,采用简单易行的一步水热法,以Vc为绿色还原剂,L-天冬素为N源,在90 ℃下分别反应1、2、3、5、10 h,制得N掺杂的三维石墨烯水凝胶,经冷冻干燥得气凝胶;在三电极体系下对材料进行电化学测试,测试结果表明:在反应时间为3 h时,比电容值最高,在电流密度为1 A/g时,比电容值达173.8 F/g.且经过1 000次充放电循环后,比电容保持率为83%.且内阻较小(0.6 Ω),具有很好的功率性能和电容行为.

关键词: 一步水热法, 绿色还原剂, N掺杂三维石墨烯, 比电容值

Abstract: To explore more environmental friendly method of preparing three dimension reduced graphene oxide, herein, using L-Asparagine as nitrogen source and vitamin C as green reductant, we proposed a simple one step hydrothermal method. After reaction at 90 ℃ for 1,2,3,5,10 h and then freeze-drying, the three dimensional N doped graphene aerogel is prepared. And the test, conducted under three electrode system indicates that the material with 3 h reaction time shows better electrochemical performance, smaller internal resistance. The specific capacitance is 173.8 F/g at current density of 1 A/g. And after 1 000 times charge and discharge cycles, the specific capacitance remain at a rate of 83%. In addition,it has lower internal resistance(0.6 Ω). In summary, the material has excellent power performance and capacitance behavior.

Key words: one step hydrothermal method, green reductant, three dimensional N doped graphene, specific capacitance

中图分类号:

O646.5

王艳素,詹亚利,严喜样. N掺杂三维石墨烯的制备及电化学性能[J]. 河北大学学报(自然科学版), 2017, 37(5): 483-488.

WANG Yansu, ZHAN Yali, YAN Xiyang. Preparation of N doped three dimensional graphene and its electrochemical performance[J]. Journal of Hebei University (Natural Science Edition), 2017, 37(5): 483-488.

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N掺杂三维石墨烯的制备及电化学性能

Preparation of N doped three dimensional graphene and its electrochemical performance

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