Method for preparing hollow antimony-based binary alloy composite nanofiber material based on electrostatic spinning and potassium storage application of hollow antimony-based binary alloy composite nanofiber material

[0017] Example 1

[0018] 20 mg of hydroxylated multi-walled carbon nanotubes were dissolved in 10 ml of DMF to form a black solution after 3 hours, and then add 2 mmol of SBCl in solution. 3 Ni (CH) 3 COO) 2 · 4h 2 After stirring at room temperature for 4 hours, 0.7 g of polypropylene nitrile and mixture of 0.3 g of polymethyl methacrylate, and heated overnight stirring at 60 ° C. The spinning fluid was transferred to a 10 ml disposable syringe and then used in electrostatic spinning. Promoting speed is 50 ul min -1 The working voltage is set to 15kV, collected in the aluminum foil, the needle model is 21g, the needle to the collector is 18cm. After 8 hours of spinning, the fibers were vacuum overnight overnight, and the solvent was allowed to volatilize. After drying, the nanofiber film is in Ar / h 2 Atmosphere first with 2 o C MIN -1 Speed ​​temperature rising to 280 oC Insulation 3H for pre-carnet, keep the original topography of fibers, then 5 o C MIN -1 Rate continues to war

[0019] Example 2

[0020] The method of this embodiment is substantially the same as in Example 1, and the difference is: will Ni (CH) 3 COO) 2 · 4h 2 O change to SNCL 2 , SNCL 2 SBCL 3 The molar ratio is also 1: 1. The resulting sample was SNSB / CNT / PC composite nanofiber material. Depend on figure 2 Sem images, the diameter of nanofibers is 200-300 nm, and the surface is very smooth. The SNSB alloy particles are about 50 nm, and there is a reunite phenomenon. The SNSB alloy particles are in the hollow passage of the fibers. The presence of CNT is not observed by the SEM image, because CNT is well limited to the interior of carbon nanofibers.

[0021] Example 3

[0022] The method of this embodiment is substantially the same as in Example 1, and the difference is: will Ni (CH) 3 COO) 2 · 4h 2 O change to COCL 2 , CoCl 2 SBCL 3 The molar ratio is also 1: 1. The resulting sample was a COSB / CNT / PC composite nanofiber material. Depend on image 3 The SEM picture shows that the nanofiber is several hundred nanometers, and the COSB nanoparticle diameter is several nanometers, which can clearly see that the COSB nanoparticles are uniformly distributed in the inside and outside of the carbon fiber, and can see the interior of the fibers as a hollow structure, because PMMA is generated during the calcination process. The CNT is exposed to the hollow passage to form a good conductive network.

[0023] The xSB (x = Ni, Sn, CO) / CNT / PC complex nanofiber material of the present invention is characterized by XRD technology. Figure 4 Indicated by Figure 4 It can be seen that the NISB / CNT / PC, SNSB / CNT / PC, SNSB