Chemical Research in Chinese Universities ›› 2018, Vol. 34 ›› Issue (6): 882-886.doi: 10.1007/s40242-018-8073-6

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One Step Hydrothermal Synthesis of Flower-shaped Co3O4 Nanorods on Nickel Foam as Supercapacitor Materials and Their Excellent Electrochemical Performance

WANG Chen1, MENG Yanshuang1,3, WANG Lei1, ZHU Fuliang1,3, ZHANG Yue2   

  1. 1. School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, P. R. China;
    2. Department of Mechanical and Industrial Engineering, Texas A & M University-Kingsville, Kingsville, TX 78363, USA;
    3. State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou 730050, P. R. China
  • Received:2018-03-04 Online:2018-12-01 Published:2018-08-03
  • Contact: MENG Yanshuang, ZHANG Yue E-mail:mengyanshuang@163.com;yue.zhang@tamuk.edu
  • Supported by:
    Supported by the National Natural Science Foundation of China(Nos.51364024, 51404124) and the Foundation for Innovation Groups of Basic Research in Gansu Province, China(No.1606RJIA322).

Abstract: Flower-shaped Co3O4nanorods directly grown on nickel foam(Co3O4/NF) were prepared by one step hydrothermal method at low temperature. Co3O4nanorods are directly connected with the nickel foam, and no binder is needed as an additive, so the Co3O4/NF electrode has good electrical conductivity. This flower-shaped structure makes larger surface area of Co3O4nanorods that exposes to the electrolyte, thus promoting the redox reaction. The Co3O4/NF electrode shows a high specific capacitance of 2005.34 F/g at the current density of 0.5 A/g and a high capacitance retention of 98.0% after 5000 cycles. The high superior capacitive performance with high specific capaci-tance and the excellent cyclic performance indicate that the one step hydrothermal method has great potential application in supercapacitors.

Key words: Supercapacitor, Co3O4/NF, Hydrothermal, Nanorod