|
In this thesis, polyaniline and its composite material with a carbon material for the super capacitor electrode base material, the carbon material from the surface modification and the doped polyaniline and conditions of preparation of polyaniline doped with a carbon material and the process of preparing other direction, polyaniline and its composite materials preparation, structure, performance and applied electrochemical capacitor performance impact. Using transmission electron microscopy, scanning electron microscopy, Fourier transform infrared spectroscopy and other testing methods, to study the surface morphology of the material. By cyclic voltammetry, galvanostatic charge-discharge performance of electrochemical supercapacitors. The method of using in-situ doped polyaniline were prepared / carbon fiber composite electrode material (PANI/C1) and polyaniline / carbon fiber composite electrode material (PANI/C2), SEM test results show: After activation increases the specific surface area of ??carbon fibers , and polyaniline composite significantly improved. PANI/C1 and PANI/C2 supercapacitor electrode material, respectively, as found in the organic electrolyte, the discharge capacity of these two materials were 35.0F / g and 62.6F / g. Using (NH 4 ) 2 S 2 0 8 as the oxidant, dopants were selected hydrochloric acid, nitric acid, sulfuric acid, perchloric acid, phosphoric acid, the use of polyaniline prepared by the interface as a capacitor electrode material. After cyclic voltammetry tests found phosphoric acid as a dopant of polyaniline having good reversibility, the higher the response current. After constant current charge and discharge test, the capacity of materials found were: 24.6F / g, 19.5 F / g, 39.1 F / g, 49.2 F / g, 61.5 F / g. Description phosphoric acid as a dopant of polyaniline prepared by the interface is more suitable as an electrode material. SEM test results show that: This material is mainly composed of some of the ellipsoid approximation polyaniline nanoparticles and short thick fibers. Via Finite Field Polymerization in uniform polyaniline nanotubes grown on the surface, to obtain CNTs-PANI nanocomposites. Test results show that: the use of this Finite Field Polymerization prepared PANI composites can be wrapped in a very uniform surface of CNTs composites than the capacity can reach 117.7 F / g (organic electrolyte), much higher than the pure carbon nanotubes (25.0 F / g) and pure polyaniline (61.5 F / g) than the capacity, thus indicating Finite Field Polymerization is a good method for preparing nanocomposites.
|