Synthesis And Modification Of Aminoanthraquinone For Supercapacitor Electrode Material

The supercapacitor has become a novel energy storage components with a broad application space due to its high specific capacitance, high output power and charge-discharge efficiency, long cycle life, environmental friendly, etc. The present research focuses on high-performance electrode material, which are widely applied in super-capacitor, including carbon material, a metal oxide and the conductive polymer material. The conductive polymer materials show promising use in supercapacitor because of its discharge performance of the fast and efficient, high energy density and power density, wide operating voltage window, wide temperature range, small resistance, long life and low cost.In this study, the preparation, electrochemical performance and modified of poly1,5-Diaminoanthraquinone were investigated. Polyl,5-diaminoanthraquinone conductive polymer material was synthesized with electrochemical oxidative polymerization method by using1,5-Diaminoanthraquinone monomer as raw materials. The surface morphology, the distribution of elements, crystal structure and organic configuration of the material were confirmed by SEM, EDX,XRD and FT-IR spectroscopy. The electrochemical energy storage properties were studied using cyclic voltammetry, constant current charge-discharge and AC impedance test. A new polymer was obtained by adding a certain proportion of the copper chloride in monomer, then we tested the morphology structure and capacitive properties of the polymer and analysed the polymerization process and mechanism of the modified electrode material.Poly1,5-Diaminoanthraquinone material was prepared through bonding of1,4and5,8of the monomer, it is non-crystal materials with smooth surface.Cyclic voltammetry and constant current charg-discharging test of the material was carried out in the window of-0.2～0.8V (vs. SCE) and4mol/L sulfuric acid solution, the specific capacitance was184.5F/g when the scan rate was2mV/s. When the current density for1A/g, the material has an isosceles triangle characteristics, which shows a good Faraday capacitance and reversibility. When the charge-discharge was repeated1000times, the capacity of the material was still more than93%, indicating that the material has a good cycle performance and capacitance stability.The Rct of the material was1113Ω·cm2with AC impedance test. The aggregate current response of electrode material after doped copper became larger, the surface had a rich three-dimensional skeleton and spatial structure, pore mesoporous and specific surface area increased. Excepted polymorphs10:5and10:10two sets of performance were subcrystallinity, the rest were amorphous. The specific capacitance of material, whose added ratio is10:15, achieved the best value878.2F/g when the scan rate of2mV/s through testing in the4mol/L sulfuric acid solution. The test of constant current charge-discharge showed that the material had a nice charge-discharge characteristics. The cycle life of the material with1000times’ charge-discharge recycle was maintained at above81%. The Rct of the material was277Ω·cm2and larger than original material.The modified and material was the ligand compound Cu[PDAAQ]2with square planar structure, the polymerization process was divided into four stages of nucleation, rapid growth, stable growth and decline stages, and the material obtained in the32lap was the optimal state.