氮掺杂石墨烯的制备及其超级电容性能

引用本文: 苏鹏, 郭慧林, 彭三, 宁生科. 氮掺杂石墨烯的制备及其超级电容性能[J]. 物理化学学报, doi: 10.3866/PKU.WHXB201208221 shu

Citation: SU Peng, GUO Hui-Lin, PENG San, NING Sheng-Ke. Preparation of Nitrogen-Doped Graphene and Its Supercapacitive Properties[J]. Acta Physico-Chimica Sinica, doi: 10.3866/PKU.WHXB201208221 shu

氮掺杂石墨烯的制备及其超级电容性能

苏鹏 ^1, ,
郭慧林 ^1, ,
彭三 ^1, ,
宁生科 ^2,

基金项目:
陕西省教育厅专项研究计划(09JK747)资助 (09JK747)

摘要:

以氧化石墨烯( )为原料, 尿素为还原剂和氮掺杂剂, 采用水热法合成了氮掺杂石墨烯. 利用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、傅里叶变换红外(FTIR)光谱、X 射线衍射(XRD)、X 射线光电子能谱(XPS)、氮气吸脱附分析、电导率和电化学测试对样品的形貌、结构、组成以及电化学性质进行表征. 结果表明:水热条件下尿素能有效地化学还原并对其进行氮掺杂; 通过调节原料与掺杂剂的质量比, 可以得到不同氮掺杂含量的石墨烯, 氮元素含量范围为5.47%-7.56% (原子分数); 在6 mol·L^-1的KOH电解液中, 氮元素含量为7.50%的掺杂石墨烯的超级电容性能最优, 即在3 A·g^-1电流密度下首次恒流充放电比电容可达184.5 F·g^-1, 经1200次循环后的比电容为161.7 F·g^-1, 电容保持率为87.6%.

关键词:

石墨烯
/ 氮掺杂
/ 尿素
/ 水热法
/ 超级电容器

English

Preparation of Nitrogen-Doped Graphene and Its Supercapacitive Properties

1.
1 Key Laboratory of Synthetic and Natural Functional Molecule Chemistry, College of Chemistry and Materials Science, Northwest University, Xi’an 710069, P. R. China;
2 Industry Training Center, Xi’an Technological University, Xi’an 710021, P. R. China
Received Date: 29 May 2012
Available Online: 17 October 2012
Fund Project:
陕西省教育厅专项研究计划(09JK747)资助

Abstract:

Nitrogen-doped graphene was synthesized by the hydrothermal method with graphene oxide ( ) as the raw material and urea as the reducing-doping agent. The morphology, structure, and components of the as-produced graphene were characterized by scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, nitrogen adsorption-desorption analysis, and electrical conductivity measurements. The results showed that nitrogen was doped into the graphene plane at the same time as the sheets were reduced, and the nitrogen content was between 5.47%-7.56% (atomic fraction). In addition, the electrochemical performance of the graphene was tested. Nitrogen-doped graphene with a nitrogen content of 7.50% showed excellent capacitive behavior and long cycle life. The first cycle specific discharge capacitance for the material was 184.5 F·g^-1 when cycled at 3 A·g^-1, and 12.4% losses were found after 1200 cycles in anaqueous electrolyte of 6 mol·L^-1 KOH.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

氮掺杂石墨烯的制备及其超级电容性能

English

Preparation of Nitrogen-Doped Graphene and Its Supercapacitive Properties

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

氮掺杂石墨烯的制备及其超级电容性能

English

Preparation of Nitrogen-Doped Graphene and Its Supercapacitive Properties

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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