Preparation And Capacitance Characteristics Of The Porous Crystalline Carbon-based Materials

Electrochemical supercapacitor has widely studied as a new kind of electricalstorage device. It has the advantage of rapid charge/discharge progress, high powerdensity and long circle life. As the main power or assistant power device in electricsystems, it has a bright future. Among all the electrode materials, the faradaicpseudocapacitance materials are either too expensive or limited by the resource, some ofwhich are unable to last for a long period. Traditional carbon based material often havea limited energy density, which make it unavailable under certain condition. It ismeaningful to develop new carbon materials with high capacity. It is possible toimprove carbon materials by adjusting the microstructure or by graphitization. We havedeveloped new carbon based materials in economical and simple methods. There arethree fields in this paper1.Use a one-step method to develop graphitized porous carbon using activatedcarbon as carbon resource. After mixing the carbon with NiCl2, the mixture was inheat-treatment under N2atmosphere. After acid wash and drying, the material was madeand studied as supercapacitor electrode.2.Use palm shell as carbon resource and KOH as the activating agent, amorphousstate porous carbon was made after heat treatment and was studied as a new kind ofelectrode material.3.Use a micro-wave assisted method to deal with the graphite. And put KMNO4into the layers under vacuum condition. When the MNO2grows between the layers, thedistance between graphite layers becomes larger, getting composite with3D structure.The material was studied as electrode material.