高等学校化学学报 ›› 2017, Vol. 38 ›› Issue (11): 2031-2037.doi: 10.7503/cjcu20170056

• 物理化学 • 上一篇    下一篇

NF/rGO/Co3O4/NiO电极的制备及在超级电容器中的应用

李莹莹1, 张琦1, 张宜恒2, 王磊1()   

  1. 1. 青岛科技大学化学与分子工程学院, 青岛 266042
    2. 青岛科技大学中德科技学院, 青岛 266042
  • 收稿日期:2017-01-23 出版日期:2017-11-10 发布日期:2017-10-30
  • 作者简介:联系人简介: 王 磊, 男, 博士, 教授, 主要从事MOFs材料、 纳米材料的合成及性能研究. E-mail: inorchemwl@126.com
  • 基金资助:
    国家自然科学基金(批准号: 51372125, 21571112)和山东省自然科学基金(批准号: ZR2016EMP02)资助

Preparation of NF/rGO/Co3O4/NiO Electrode and Its Application in Supercapacitor

LI Yingying1, ZHANG Qi1, ZHANG Yiheng2, WANG Lei1,*()   

  1. 1. College of Chemistry and Molecular Engineering,Qingdao University of Science and Technology, Qingdao 266042, China
    2. Chinesisch-Deutsche Technische Fakultät,Qingdao University of Science and Technology, Qingdao 266042, China
  • Received:2017-01-23 Online:2017-11-10 Published:2017-10-30
  • Contact: WANG Lei E-mail:inorchemwl@126.com
  • Supported by:
    † Supported by the National Natural Science Foundation of China(Nos.51372125, 21571112) and the Shandong Province Natural Science Foundation, China(No.ZR2016EMP02)

摘要:

以泡沫镍(NF)为集流体, 在优化好的电位、 时间和浓度下, 将还原氧化石墨烯(rGO)、 金属氧化物(Co3O4和NiO)直接生长在泡沫镍上, 制备了NF/rGO/Co3O4和NF/rGO/Co3O4/NiO电极. 运用三电极体系对电极材料进行了恒流充放电(GCD)和交流阻抗(EIS)等测试. 结果表明, 复合材料NF/rGO/Co3O4/NiO具有较高的比容量(电流密度为2 A/g时, 比容量达到1188.6 F/g)和较好的循环稳定性(2000周充放电后, 稳定性达到80.5%). 该材料还具有较高的倍率性能, 当电流密度由2 A/g增至12 A/g时, 倍率性能仍能达到75.7%.

关键词: 超级电容器, 电化学沉积, 还原型氧化石墨烯, 金属氧化物

Abstract:

The electrochemical deposition method was used to prepare NF/rGO/Co3O4 and NF/rGO/Co3O4/NiO electrodes(NF=nickel foam; rGO=reduced graphene oxide). Here, with NF as a current collector, rGO, Co3O4 and NiO were grown on NF directly without any binder under specific conditions including optimized potential, time and concentration. NF/rGO/Co3O4 and NF/rGO/Co3O4/NiO electrodes were used as the electrode of supercapacitor, and three-electrode system was employed in cyclic voltammetry, galvanostatic charge-discharge and electrochemical impe-dance spectroscopy characterization of the electrodes. The results showed that the capacitance of NF/rGO/Co3O4/NiO electrode was 1188.6 F/g at 2 A/g; its rate capability was 75.7% when the current density varied from 2 A/g to 12 A/g; and its cycling stability was 80.5% after 2000 times. Compared with NF/rGO/Co3O4, the supercapacitor performance of NF/rGO/Co3O4/NiO electrode improved a lot, which can be attributed to the synergistic effect of Co3O4 and NiO. What’s more, rGO could enhance the electroconductivity of electrodes to a large extent.

Key words: Supercapacitor, Electrochemical deposition, Reduced graphene oxide(rGO), Metallic oxide

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