Preparation Of Ordered Mesoporous Carbon

Mesoporous carbon material has several advanced properties, such as high temperature resistance, acid or alkali resistance, electrical conductivity and thermal conductivity, and can be used as separation material, electrode material, catalyst support and absorption material in the field of environment protection and energy storage. The requirements for mesopores carbon are more strict due to its various applications, so mesoporous carbon with narrow pore size distribution is becoming the aim of research work.In this thesis, the ordered mesoporous carbon were prepared by template method with triple-copolymer F127( PEO-PPO-PEO) as template agent and phenol-aldehyde resin (PF) prepared by ourselves as carbon precursor. The resultant carbon materials were characterized by XRD, SEM, TEM and N₂ adsorption/desorption. The relationship between synthesis methods and structure of the derived materials was studied, and the formation mechanism was proposed. The results show that the dosage of F127, reaction temperature, stirring time, carbonization temperature, carbonization heating rate directly affect the structure of mesoporous carbon and the pore size distribution. When the amount of F127 is 40%, reaction temperature 40℃, stirring time 30 min, carbonization temperature 800℃, and heating rate 1℃/min, the mesoporous carbon with perfect orderliness and narrow pore size distribution can be prepared.Cyclic Voltammograms, AC Impedance and Galvanostatic Charge/Discharge methods were used to test the capacitance characteristics of the mesoporous carbon. The results show that the Cyclic Voltammograms curve of mesoporous carbon material has regular quadrilateral voltage windows. The mesoporous carbon prepared with stirring time of 30 min, with mass in the electrod of 50 mg has lower impedance, and is suitable for large current density charging/discharging. The max specific capacitance can reach 140.69 F/g at the current density of 300 mA/g.