Acta Phys. -Chim. Sin. ›› 2015, Vol. 31 ›› Issue (11): 2220-2228.doi: 10.3866/PKU.WHXB201510131

• PHYSICAL CHEMISTRY OF MATERIALS • Previous Articles    

Preparation and Supercapacitor Properties of Carbon-Coated SnO2 Hollow Fibers

Xiao-Mei. HAN1,Yan-Bo. WU2,*(),Heng-Yan. ZHAO2,Jun. BI2,Bin-Bin. WEI2   

  1. 1 College of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, Liaoning Province, P. R. China
    2 College of Environmental and Chemical Engineering, Dalian Jiaotong University, Dalian 116028, Liaoning Province, P. R. China
  • Received:2015-04-27 Published:2015-11-13
  • Contact: Yan-Bo. WU E-mail:wuyanbo_djd@126.com
  • Supported by:
    the National Natural Science Foundation of China(21076028);National Training Programs of lnnovation andEntreprenurship for Undergraduates, China(201410150016)

Abstract:

A new carbon-coated SnO2 hollow fiber was successfully prepared by coaxial electrospinning, and its supercapacitor properties were well studied. The surface morphology and structure were examined using X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and the Brunauer-Emmett-Teller (BET) method. The results showed hollow fibers of average diameter 1 μm and carbon-coated SnO2 particles of average size 3-15 nm uniformly distributed on the fiber shell. The surface area was 565 m2·g-1. In a three-electrode system, the electrode achieved a respectable specific capacitance of 397.5 F·g-1 at 0.25 A·g-1, and the capacitance retained ratio was still 88% of the initial value after 3000 cycles at 1.0 A·g-1. In the case of a symmetrical two-electrode system, the electrode achieved a specific capacitance of 162.0 F·g-1 at 0.25 A·g-1 current density, and the capacitance retained ratio was 84% of the initial value after 3000 cycles at 1.0 A·g-1.

Key words: Coaxial electrospinning, Carbon-coated nano-SnO2, Hollow structure, Supercapacitor

MSC2000: 

  • O646