The Performance Of The Oxidation Of Nickel And Its Compounds Supercapacitor

Electrochemical super capacitor is a kind of the storage battery and the conventional capacitor. It is during the emerging energy storage equipment and device, which is a kind of conventional capacitors with greater energy has higher power and longer cycle life than the storage battery. it can better meet the staring of the electric car, accelerate, rapid brake, high power density and output requirements using the battery and. supercapacitor hybrid power system It can be applied in many directions, for example:engine electric systems, such as tanks, hybrid electric vehicle, motorcycle, can reduce the capacity of equipment, especially at low temperature, ensure the reliable initiation.The super capacitor is also applied to the military, such as microwave, laser weapon and MW large engine power. The new concept weapon to get further development. The super capacitor can also be used as a backup power supply, such as a computer, telephone, television and DV equipment. It is a question that increasing the electrode materials for electrochemical capacitors than capacity electrode material about cycling performance and reduce the cost of electrode materials. What is become the problem that people cares,carbon resistance larger forces people to look for other metal oxide as electrode materials for electrochemical capacitors RuO2·H2O of720F·g-1with high specific capacity. It has been considered to be the best electrode materials. However, duing to its price is very expensive to restrict. Its application is very wide. Nickel oxide electrode materials are currently studied electrochemical capacitor electrode material, because of its relatively high specific capacitance theory of2400F·g-1and it is quite cheap etc..This paper describes the study of nickel oxide materials. Capacitor anode material of electric performance test means capable of using AC impedance, constant current charge discharge, cyclic voltammetry and test method, Powder surface topography can use scanning electron microscopy(SEM) and transmission electron microscope (TEM) to determine the properties of crystals, with X ray diffraction(XRD) were measured.First,through hydrothermal method synthesis NiO powder, and with the X-ray diffraction(XRD), scanning electron microscopy(SEM) and electrochemical measurements. The capacitance of the reaction mechanism and the effect of surfactant on the preliminary theoretical research. The surface of NiO electrode occurs redox reaction:NiO+OH→? Ni(OOH)2+e-to store charge, so the electrode material specific surface area are also very important factors, it can make the electrolyte and the active material of contact sufficiently, thereby improving the efficiency of oxidation reduction reaction. The theory of NiO voltage in the range of-0.2～0.6V, but the range is from0V to0.4V in the actual test. Investigation of the ionic and nonionic surfactants on nickel oxide morphology, the results showed that:in the surfactant, anionic surfactant than cationic and nonionic surfactants can improve the NiO specific surface area so as to improve its specific capacitance.Second, prepared by Sol-gel method NiO electrode materials, the obtained green gel precursor calcined at400℃and thus get the black product of NiO. Finally, examine the chitosan additives on the morphology of NiO electrode materials and performance of electrochemical.The last, using different elements on NiO material doped, examineed the aluminum, cobalt and manganese on the effects of nickel oxide results:cobalt doping ratio aluminum and manganese on NiO capacitance increased more obviously. And then on the content of cobalt is undertook study, in which the dopant is in5%cobalt the following as the content increased, specific capacitance increased. More than5%cobalt of the capacitance increases, specific capacitance drops. Because the cobalt doped expanded pseudo capacitance forming region, thereby improving the specific capacitance.