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The super capacitor is a performance between the new high-power energy storage device between the battery and the conventional capacitor , compared with the battery , super ion capacitor having a greater power density values ??; compared with the conventional electrostatic capacitor has a higher energy density; instantaneous release of king current characteristics , high charging and discharging efficiency , long cycle life . The Super Ion Capacitors Therefore, flash and ignition of electric vehicles , high-power weapons , industrial equipment , electronic equipment , backup power has an irreplaceable role . Supercapacitor including electric double layer capacitor (EDLC) and Faraday pseudopotential capacitor Faraday pseudo quality of the capacitor capacitance density than the electric double layer capacitor 10 to 100 times higher . Pseudocapacitive unique reaction mechanism . The supercapacitors study focused on the preparation of high-performance electrode materials and electrolyte . This article was selected as the electrode material of nickel hydroxide , nickel oxide , systematic study of the preparation process of a super - capacitor electrode material , the capacitance characteristic , and the capacitance forming mechanism . By X-ray diffraction ( XRD ) , scanning electron microscopy (SEM) for the electrode material to characterize the binding constant current charge and discharge to test the capacitance characteristics of the electrode material were investigated . Nickel hydroxide prepared using a sol - gel method , it was found to affect the quality of the process conditions of the nickel hydroxide in the preparation process the reaction temperature, the reaction was added the manner and addition rate , reactant concentration, the pH value of the reaction system , the pH value was adjusted manner , dispersant ratio , reaction time , aging time , colloidal separation , drying temperature , and other factors . The sol-gel method hydroxide nickel nickel oxide the large capacity pseudocapacitive electrode material prepared by vacuum heat treatment 260 ° C 0.5Pa holding time 1h specific capacitance up to 481.15F / g . The study found that factors such as heat treatment atmosphere , vacuum heat treatment temperature , holding time of vacuum heat treatment , vacuum degree has a great influence on the performance of specific capacitance of nickel oxide . Studies have shown that lithium nickel oxide doped beneficial to its improved specific capacitance .
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