Study On The Electrochemical Performance Of Polyaniline Composites Based Of Carbon Fiber Cloth As Supercapacitor Electrode Materials

As the energy storage element, the application and research of the super capacitors is very broad , including information, communications, aerospace, and defense fields?Especially in hybrid vehicles,often as a power output storage device when climbing or starting a cars. This requires a supercapacitor having a large power,a longer cycle life,wide temperature used,higher safety Etc.Research hotspot of supercapacitor electrode material include carbon materials, metal oxides, and conductive polymer, These years. In this paper, use the conductive polymer polyaniline as electrode materials, and launched a series of capacitor electrode Composites. Polyaniline is a conductive polymer, In addition to the ease of processing,and many other advantages, both has the conductivity of metal and semiconductor and flexibility of the Polymer, making the polyaniline In many areas have a wide range of research, such as secondary batteries, electrochromic, electromagnetic shielding.military camouflage, anti-corrosion coatings, antistatic materials Etc.In this paper, by the oxidative polymerization method, Polyaniline grown directly on the surface of Carbon fiber cloth to form polyaniline@CFC material?PANI@CFC? and as a substrate, electrical depositing a layer of manganese dioxide on the surface of Polyaniline, formation of manganese dioxide/polyaniline@CFC composites ?MnO₂/PANI@CFC?. In addition, adding graphite oxide in the solution during the oxidative polymerization of polyaniline, polyaniline and graphite oxide composite material growth on the CFC, forming a polyaniline/graphite oxide@CFC composites ?PANI/GO@CFC?, By an in situ polymerization. The above materials were characterized, by cyclic voltammetry, electrochemical impedance, constant current charge-discharge electrochemical analysis methods.The surface of CFC wore coverd by coral -like polyaniline, and the coral -like structure connected each other to form a staggered three-dimensional porous structure with a large specific surface area. By discussing the result of electrochemical performance tests, PANI@CFC has good cycle performance and a specific capacitance of 730 F·g^-1 at a current density of 1mA·cm-2.During the formation of PANI/GO@CFC, Polymerization of aniline occurred between graphite oxide layers and react with the oxygen-containing group on the surface of graphite oxide. The formed Polyaniline coated graphite oxide sheet and connected with CFC. By electrochemical performance test, PANI/GO@CFC has a high specific capacitance (614F·g^-1) and a good cycle characteristics? The specific capacitance after 800 cycles more than 86.88% ?.Using electrodeposition technique, electrodeposited manganese dioxide on surface of PANI in the PANI@CFC. MnO₂ nanosheets arrays successfully deposited on the surface of the polyaniline with good electrochemical performance, the initial specific capacity can reach 496 F g^-1.