Fabrication Of One-Dimensional Nanomaterials And Their Electrochemistry Properties Based On Electrospinning

In this paper, TiN, Co₃O₄ and ZnTi₂O₄ nanofibers were fabricated by electrospinning technique, using polyvinylpyrrolidone (PVP) as soft template and several of metal alkoxide or inorganic salts as precursor. The products were characterized by field emission scanning electron microscope (FE-SEM), X-ray diffraction (XRD), fourier transforminfrared spectra (FTIR). Especially, the electrochemical properties of the above nanofibers are discussed as well.First, TiN nanofibers were fabricated by electrospinning followed by high-temperature nitridation method. With the temperature increases, the diameter of the TiN nanofibers increases from 135 nm to 170 nm. The pure-phase TiN nanorods were obtained by calcined at the temperatures above 800 oC. The electrochemical properties were also discussed, the discharge time is prolonging with the decrease of the calcination temperature from 1400 to 800 oC. The specific capacitance of TiN nanofibers calcined at 800 oC is 24 F g^-1.Second, using PVP as a template, the fabrication of ZnTi₂O₄ nanofibers by electrospinning method was carried out. The diameter of ZnTi₂O₄ nanofibers is about 120 nm. Then, using ZnTi₂O₄ as precursor, the TiN nanofibers were prepared by heat-treatment in ammonia atmosphere at 1000 oC, which could remove out the Zn elelment, and the diameter decreased to 110 nm. Then, the electrochemical properties were discussed, the sample shows a good stability.At last, the Co₃O₄ fibers with the diameter of 150 nm were prepared by electrospinning method. The electrochemical properties of the Co₃O₄ and ZnCo₂O₄ nanofibers were discussed, the specific capacitance are 61 F g^-1 and 79 F g^-1, respectively. The Co₃O₄ and ZnCo₂O₄ nanofibers showed good stability, and only 9.8% and 2% capacitance loss after 1000 cycles, which displayed the potential application in supercapacitor.