石墨烯纳米片/CoS2复合材料的制备及其在超级电容器中的应用

doi:10.3969/j.issn.0438-1157.2014.07.047

化工学报 ›› 2014, Vol. 65 ›› Issue (7): 2849-2854.DOI: 10.3969/j.issn.0438-1157.2014.07.047

• 材料化学工程与纳米技术 • 上一篇下一篇

石墨烯纳米片/CoS₂复合材料的制备及其在超级电容器中的应用

李吉, 魏彤, 闫俊, 龙从来, 范壮军

哈尔滨工程大学材料科学与化学工程学院, 超轻材料和表面技术重点实验室, 黑龙江哈尔滨 150001

收稿日期:2014-04-11 修回日期:2014-04-24 出版日期:2014-07-05 发布日期:2014-07-05
通讯作者: 魏彤
基金资助:
国家自然科学基金项目（21003028）。

Preparation of graphene nanosheet/CoS₂ composite and its application in supercapacitors

LI Ji, WEI Tong, YAN Jun, LONG Conglai, FAN Zhuangjun

Key Laboratory of Superlight Materials and Surface Technology, School of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, Heilongjiang, China

Received:2014-04-11 Revised:2014-04-24 Online:2014-07-05 Published:2014-07-05
Supported by:
supported by the National Natural Science Foundation of China (21003028).

摘要/Abstract

摘要： 采用一步水热法制备石墨烯纳米片（GNS）/CoS₂复合材料，利用XRD和SEM对所制备复合材料的微观结构进行表征，采用循环伏安法和交流阻抗法对复合材料的电化学性能进行研究。研究结果表明，在水热过程中，氧化石墨（GO）逐渐被还原成石墨烯纳米片（GNS），能够为CoS₂晶核的形成提供更多的接触点，有利于CoS₂颗粒均匀地生长在GNS表面。这种结构的复合材料既能够显著增加CoS₂和电解液之间的有效接触面积，提高CoS₂的电化学利用率，同时又能够改善材料的导电性，有利于提高材料的比电容。

关键词: CoS₂, 石墨烯, 超级电容器, 复合材料, 电化学性能

Abstract: The graphene nanosheet(GNS)/CoS₂ composite was prepared by the one-step hydrothermal method. The crystal structure and morphology were characterized by XRD and SEM. Electrochemical properties were determined by cyclic voltammetry and electrochemical impedance spectroscopy. Graphite oxide (GO) was gradually reduced to form graphene nanasheet during the hydrothermal process, which could provide abundant contact sites for the formation of CoS₂ crystal nucleus, thus leading to uniform distribution of CoS₂particles on the surface of graphene. Such novel structure composite not only significantly enhanced the effective contact area between CoS₂ and electrolyte, but also improved electrochemical utilization of CoS₂ electrode materials. Meanwhile, it facilitated electrical conductivity of the material, resulting in increased specific capacitance.

Key words: CoS₂, graphene, supercapacitors, composites, electrochemical performance

中图分类号:

O646
TB34

李吉, 魏彤, 闫俊, 龙从来, 范壮军. 石墨烯纳米片/CoS₂复合材料的制备及其在超级电容器中的应用[J]. 化工学报, 2014, 65(7): 2849-2854.

LI Ji, WEI Tong, YAN Jun, LONG Conglai, FAN Zhuangjun. Preparation of graphene nanosheet/CoS₂ composite and its application in supercapacitors[J]. CIESC Journal, 2014, 65(7): 2849-2854.

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石墨烯纳米片/CoS₂复合材料的制备及其在超级电容器中的应用

Preparation of graphene nanosheet/CoS₂ composite and its application in supercapacitors

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