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 E-mail:hongying8860@163.com
  • 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).

Abstract:

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

MSC2000: 

  • O646