Synthesis Of OMC By Using A Double-Surfactants System And Its Electrochemical Performance

Compared to traditional porous carbon,Ordered mesoporous carbon posses many advantages,such as a narrow pore distribution, high specific surface area, good chemical stability, good conductivity, excellent mechanical properties.Because of these characteristics OMC gets it’s application in the field of energy storage, catalyst supports, and adsorption and separation of organic macromolecules. As a conducting polymer, polyaniline can be used as electrode materials for supercapacitor, owns high capacity but poor cycling performance. OMC/polyaniline composite posses these two materials’ complement, get high capacity and good cycling performance, which has recently gotten a lot of attention.In this paper, a highly ordered mesoporous carbon was synthesised by using a double-surfactants system. In the system, Non-ionic surfactant triblock copolymer P123(EO20PO70EO20) was used as templating agent, anionic surfactant sodium dodecyl benzene sulfonate (SDBS) was used as the second surfactant, tetraethylorthosilicate (TEOS) was as the silicon source, sulfuric acid (H2SO4) was the cross-linking agent.OMCs with hexagonal(p6mm) was prepared by direct carbonization and silica template removing process. The OMCs Were characterized by XRD, SEM, TEM, HRTEM, and BET test. The influences of the SDBS addition, stirring on the on the morphology and electrochemical performance of OMCs were also investigated. A preliminary analysis of the reason that SDBS addition to the OMCs’ morphology was given, this paper also pointed out that stirring was useful to form highly ordered meso-porous, while good morphology(uniform short stick) OMC which also own a considerable degree of order can generate under static condition. The results show that the short stick OMCs has a BET surface area of980.8501m2/g, pore volume of1.29cm3/g and a narrow pore distribution at4.2nm. ordered mesoporous carbon/polyaniline composites were synthesies by the in situ polymerization method. characterizations of SEM explained that polyaniline has a good dispersion in the compositeThe OMCs’ electrochemical performance for lithium-ion batteries were investigated by using a galvanostatic charge/discharge cycling method The material showed high capacity and good cycle stability, the initial reversible capacity was up to964mA/g at the current density of50mA/g. After50cycles, the capacity retention rate was61%. Ordered mesoporous carbon/polyaniline composites also showed excellent capacitor performance, better than the pure ordered mesoporous carbon. The of45%OMC-composites owned the best electrochemical performance with a 361F/g capacity at the current density of0.1A/g And a retention rate of71.72%at the current density of2A/g...