Perparation Of Multiple Conductive Carbon Net And Their Performance

Because carbon nanotubes,carbon nanofibers and graphene have large specific surface area, good electrical conductivity, stable performance, light weight and other characteristics,they are widely promoted and applyed in the fields of scientific research and production, Tens of thousands of related reports have been published at home and abroad. However, the mere use of carbon material has been unable to meet the current requirements, so the researchers are increasing focus on the multiple carbon series conductive networks.There are many preparation methods of multiple carbon series conductive networks. According to the actual application, we used electrostatic spinning and powder metallurgy in this paper. Electrospinning draws polymer materials into the nano fibers in the electrostatic field. The diameter of the nano fibers is from 1/10 to 1/1000 of the traditional fibers. They have outstanding performance in specific surface area, length diameter ratio, porosity, permeability and so on, so they have been widely used in electrochemical supercapacitor; Powder metallurgy presses graphite, carbon nanotubes, electrolytic copper powder, titanium silicon carbon powder into bulk materials under high temperature and high pressure. The bulk materials have remarkable performance in conductivity, strength, wear resistance and so on, so they have been widely used in the pantograph slider material.This paper mainly studies the multiple carbon series conductive networks which are made by electrostatic spinning and powder metallurgy and their applications in electrochemical supercapacitor and the pantograph slider materials. The morphology of materials was characterized by optical microscopy, scanning electron microscopy. The structure of materials was characterized by pore surface analyzer. The electrochemical storage of materials was characterized by cyclic voltammetry, galvanostatic charge/ discharge measurements and AC impedance. The friction and wear properties of charged were characterized by the wear rate, friction coefficient and the arc energy. The research contents are as follows:1. Carbon nanofibers/carbon nanotubes dual carbon series conductive film (CNF/CNTF) were prepared by electrostatic spinning. Carbon nanofibers/carbon nanotubes dual carbon series conductive network (CNF/CNTN) were made by the way that carbon nanotubes were second grew on the CNF/CNTF. The results showed that the specific capacity of CNF/CNTN is 117.6 F·g-1(organic electrolyte), and the specific capacity of CNF/CNTF is 94.3 F·g-1(organic electrolyte).2. Polyacrylonitrile/graphene oxide films (PAN/GOF) which contained catalyst were preparated by electrostatic spinning,then growth of CNT and reduction of GO were made by chemical vapor deposition method under high temperature,carbon nanofibers/ carbon nanotubes/graphene three carbon series conductive films (CNF/CNT/GF) were made out in the end; Polyacrylonitrile/carbon nanotubes films (PAN/GOF) were preparated by electrostatic spinning, after preoxidation treatment the films were dipped in GO solution, GO on the surface of the films were reduced on the high temperature, carbon nanofibers/carbon nanotubes/graphene three carbon series conductive network (CNF/CNT/GN) were made out in the end. The results showed that the specific capacity of CNF/CNT/GN is 138.4 F·g-1(organic electrolyte), and the specific capacity of CNF/CNTF is 114.0 F·g-1(organic electrolyte).3. Graphite,CNT and Ti3SiC2 which were plated by copper were mixed with electrolytic copper powder according to the different proportion,then they were made to four carbon series conductive network by powder metallurgy. The results showed that the overall performance is best when the mass fraction of graphite, CNT is 10%.