ELECTROCHEMICAL STUDY OF NOVEL MoO3/CMK-3 AS ELECTRODE MATERIALS FOR SUPERCAPACITORS

摘要

Mesoporous carbon with MoO3 loading (MoO3/CMK-3) was obtained via ultrasonic assembly with CMK-3 as the host material and MoO3 as the guest material which was yield from MoO3·H2O2·H2O sol precursor. The structure and surface morphology of the obtained MoO3/CMK-3 powders ere characterized by X-ray Dffraction (XRD) and Feld Eission Sanning Eectron Mcroscope (FE-SEM). The supercapacitive behavior of MoO3/CMK-3 in 1M KNO3 electrolyte was studied by means of cyclic voltammetry (CV) and constant current charge ?discharge cycling (CD). The XRD results indicate that the MoO3 nanoparticles were loaded in the CMK-3. The FE-SEM images show the homogeneous surface of MoO3/CMK-3. The CV curves illustrate the existence of fast and reversible redox reactions on the surface of MoO3/CMK-3 electrode. CD curves show that the fast and reversible charge-discharge process occurs on the electrode surface. The specific capacitance of MoO3/CMK-3 is 105.54 Fg-1 at 500 mA g-1.Furthermore, the specific capacitance remains 72% of the original value when the current density increase from 500 to 1000 mA g-1.The results suggested that the MoO3/CMK-3 is a promising electrode material for high performance EDLCs.