Acta Phys. -Chim. Sin. ›› 2013, Vol. 29 ›› Issue (07): 1501-1506.doi: 10.3866/PKU.WHXB201304241

• ELECTROCHEMISTRY AND NEW ENERGY • Previous Articles     Next Articles

Synthesis and Characterization of NiCo2O4 Nanoflower/Activated Carbon Fiber Composite and Its Supercapacitor Properties

WU Hong-Ying, WANG Huan-Wen   

  1. College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, P. R. China
  • Received:2012-12-24 Revised:2013-04-22 Published:2013-06-14
  • Contact: WU Hong-Ying
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20963009, 21163017) and Natural Science Foundation of Gansu Province, China (0803RJA005).


In the present work, NiCo2O4 nanowires grown directly on carbon fibers self-organize into a nanoflower morphology. The materials are prepared by hydrothermal treatment and subsequent low-temperature annealing. Field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) results reveal a hierarchical three-dimensional mesoporous structure, which facilitates ion transport and electronic conduction for fast redox reactions. As a result, the electrode achieves a respectable specific capacitance of 1626 F·g-1 at 1 A·g-1 and high rate capability (65% retention at 10 A·g-1), so it shows promise for application in supercapacitors.

Key words: NiCo2O4, Nanoflower, Hydrothermal treatment, Supercapacitor, Electrode material


  • O646