Study On Hybrid Supercapacitors

Supercapacitor is a new type of energy storage device, with large capacity and high energy density characteristics. Used in electric cars, wind power, and other aspects of military power, Supercapacitor has broad application prospects. So the goal of this work is to investigate a new type hybrid supercapacitor. We deal with electrode materials and structures of supercapacitor, and try to solve electrode preparation process and capacitor design problems. We start from the carbon materials research and electrode preparation process, resolve practical issues in the process and test. In this work, we obtain some methods of improve the performance parameters of supercapacitor. In order to improve the working voltage of supercapacitor, activated carbon negative electrode and nickel oxide positive electrode are combined to form a hybrid supercapacitor structure. By optimizing the electrode processes and component design, Hybrid supercapacitor performance of this research has been significantly improved. After testing, the performance is as follows: Operating voltage 0.5V~1.4V, capacity 13792 F, the internal resistance 0.5m?, specific energy 4.4Wh/kg, than the power of 1.56kW/kg(1500A discharge). Electrode preparation is one of the critical technology of supercapacitors. To meet the hybrid supercapacitor large current charge&discharge and long cycle life needs, in this study, we prepare an electrode with sintered nickel substrate vacuum impregnation of active substance. In order to improve the impedance characteristics of activated carbon electrode, We make a detailed study on formulation and process of carbon electrode. As a result, specific energy and power performance of carbon electrode are relatively good, meeting the requirements of rapid charging and discharging. In sealing performance research, the concept of catalytic electrode introducing further promotes the practical process of hybrid supercapacitor.