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电化学(中英文) ›› 2017, Vol. 23 ›› Issue (2): 217-225.  doi: 10.13208/j.electrochem.161246

• 田昭武先生90大寿祝贺专辑(厦门大学 孙世刚 林昌健教授主编) • 上一篇    下一篇

硫化镍/三维网络石墨烯复合材料制备及其在高性能超级电容器的应用研究

王晓敏1*,窦湟琳1,田 真1,张久俊2*   

  1. 1. 太原理工大学材料科学与工程学院,山西 太原;2. 上海大学理学院/能源研究院,上海
  • 收稿日期:2016-12-06 修回日期:2017-01-15 出版日期:2017-04-28 发布日期:2017-02-09
  • 通讯作者: Xiaomin Wang, Jiujun Zhang E-mail:wangxiaomin@tyut.edu.cn; jiujun@shaw.ca
  • 基金资助:

    国家自然科学基金项目(51572184,51372160)资助

Novel Composites between Nano-Structured Nickel Sulfides and Three-Dimensional Graphene for High Performance Supercapacitors

Xiaomin Wang1*, Huanglin Dou1, Zhen Tian1, Jiujun Zhang2*   

  1. 1. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China; 2. College of Science, and Institute for Sustainable Energy, Shanghai University, Shanghai 200444, China
  • Received:2016-12-06 Revised:2017-01-15 Published:2017-04-28 Online:2017-02-09
  • Contact: Xiaomin Wang, Jiujun Zhang E-mail:wangxiaomin@tyut.edu.cn; jiujun@shaw.ca
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (Grant No. 51372160 and 51172152).

摘要:

本文在泡沫镍上生长三维网络状结构的石墨烯(3DG),以此为模板合成石墨烯复合电极并将其应用于超级电容器. 采用一步水热法在3DG上合成得到Ni3S2纳米棒结构(Ni3S2/3DG). 通过TEM、XRD、SEM和拉曼光谱等手段表征对Ni3S2/3DG复合材料的形态与结构进行表征. 电化学测试表明,Ni3S2/3DG复合材料具有高的比电容(在扫速为5 mV·s-1下,具有1825.3 F·g-1的比容量)和放电电容(在电流密度10 mA下电容高达516.7 F·g-1). 此外,在电流密度20 mA下具有良好的循环性能(循环1000周后仍能保留约100%的初始电容). 本工作为得到高能量密度和良好的长期稳定性的复合材料提供了参考.

关键词: 三维石墨烯, 硫化镍, 超级电容器, 电化学储能

Abstract:

In this paper, a three-dimensional graphene (3DG) network grown on nickel foam was employed as a template for synthesizing graphene-based composite materials of supercapacitor electrode. The composites (crystal Ni3S2 nanorods on the surface of 3DG (abbreviated as Ni3S2/3DG)) were obtained through a one-step hydrothermal reaction. The morphological and structural evolution of the Ni3S2/3DG composites were investigated by SEM, TEM, XRD and Raman spectroscopy. Detailed electrochemical characterization showed that the Ni3S2/3DG-coated electrodes exhibited both a specific capacitance as high as 1825 F·g-1 at 5 mV·s-1 and a discharge capacitance as high as 517 F·g-1 at 10 mA. Remarkably, a high cycling performance (~ 100% capacitance retention after 1000 cycles) is achieved at a current density of 20 mA.

Key words: three-dimensional graphene, nickel sulfide, supercapacitor, electrochenical energy storage

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