Preparation And Electrochemical Properties Of Carbon Aerogel/nickel Oxide/polyaniline Composites

As an important energy storage device,super capacitor plays an important role in energy field.This literary grace for preparation of carbon aerogels,especially the first,after introducing nickel oxide,made of carbon aerogel/nickel oxide,using aniline as raw materials through chemical oxidative polymerization method into carbon aerogel/nickel oxied/polyniline composite material,its made of super capacitor electrode,explore related elcctrochemical performance.Specific research contents and results are as follows:Using resorcinol and formaldehyde as raw materials,molar ratio of 2:1 and under the conditions of the solution concentration was 10%,the preparation of carbon aerogels,the mcthods of ir,XRD to test it,the experiment concluded that the catalyst under the same conditions,the higher the temperature of the sol gel made of short time;At the same temperature,the time of sol gel formed by more catalyst dosage is shorter;In the preparation of the sol gel when the temperature is too low unable to form gel(this experiment under the condition of 20? to the preparation of success),which had nothing to do with gel time.The drying temperature of 40 ?,nR:nc = 300,carbon aerogel materials made by the specific surface area of 334 m2/g.Nickel oxide was added to the carbon aerogel to make carbon aerogel/nickel oxide material,and the carbon aerogel/nickel/polyaniline composite was prepared by oxidation polymerization.The cyclic voltammetry,conductivity test,SEM and TG were used.The results show that the cyclic volt-ampere curve has some relation to the number of carbon aerogel and nickel oxide,and the best proportion is nickel oxide,which accounts for 40%of the carbon aerogel,and the carbon aerogel/nickel oxide accounts for 32%.The conductivity of the composite material is 19S/cm.In the temperature range of thermal retest(0?800?),the residual amount of the sample was basically consistent with that of carbon aerogel/nickel oxide.In carbon aerogel/nickel oxide/polyaniline composite conductive agent is added(polyacetylene),adhesive(PVDF),the pelleting,drying process such as the preparation of super capacitor electrode,with lmol/L sodium nitrate as the electrolyte,using cyclic voltammetry,ac impedance method and constant current charge and discharge testing method to test it,the test results showed that carbon aerogel showed the typical characteristics of electric double layer,nickel oxide and polyaniline showed typical Faraday capacitance(constraint capacitance).The mechanism of storage energy of carbon aerogel/ni/polyaniline composite electrode materials is the mechanism of double layer storage and the mechanism of Faraday capacitance(pseudo capacitance).The specific capacitance at the current density of 0.2A g-1 is 286Fg-1?With the increase of the constant current charging and discharging current,the capacitance of the capacitor is decreased,and the capacitance remains at 58%when the current density is 5.OA·g-1.With the increase of the content of carbon materials in composites,the capacitance retention rate of the composites increased significantly.