Acta Phys. -Chim. Sin. ›› 2012, Vol. 28 ›› Issue (12): 2874-2878.doi: 10.3866/PKU.WHXB201209063

• ELECTROCHEMISTRY AND NEW ENERGY • Previous Articles     Next Articles

Magnetic and Electrochemical Properties of NiCo2O4 Microbelts Fabricated by Electrospinning

ZHU Fu-Liang1, ZHAO Jing-Xin1,2, CHENG Yong-Liang2, LI Hai-Bao1, YAN Xing-Bin2   

  1. 1 School of Material Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, P. R. China;
    2 Laboratory of Clean Energy Chemistry and Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou 730000,P. R. China
  • Received:2012-07-02 Revised:2012-09-06 Published:2012-11-14
  • Supported by:

    The project was supported by the Natural Science Foundation of Gansu Province, China (3ZS042-B25-029) and National Natural Science Foundation of China (51005225).

Abstract:

Cobaltate nickel (NiCo2O4) microbelts were fabricated by direct calcination of electrospun precursor samples with an appropriate heating rate. The crystal structure, morphology, magnetic properties, and electrochemical properties of the NiCo2O4 microbelts were investigated by X-ray diffraction, scanning electron microscopy, vibrating sample magnetometry, and electrochemical analysis. The results showed that a heating rate of 1℃·min-1 resulted in the formation of cubic spinel NiCo2O4 microbelts. After calcination at high temperatures, the microbelts retained their one-dimensional structure. Magnetization results indicated that the NiCo2O4 microbelts were superparamagnetic and their magnetization value at 10 kOe was 6.35 emu·g-1. Moreover, the electrochemical results suggest that the capacitance of the NiCo2O4 microbelts is typical pseudocapacitive capacitance, and the value of the specific capacitance gradually decreases with increasing discharge current density.

Key words: NiCo2O4, Microbelt, Magnetic property, Electrochemical property, Rate capability

MSC2000: 

  • O646