CaMoO4/GO复合材料的制备及其超级电容器性能

采用水热法成功合成了CaMoO₄/氧化石墨烯(GO)纳米复合材料。通过材料的表面形貌、晶体结构和电化学性能研究合成的纳米复合材料。结果表明,CaMoO₄/GO电极在电流密度0.5 A/g时比电容高达571.82 F/g,并且在1 A/g的电流密度下,经过1000次循环后的比电容保持率仍为84%。为了测试电极材料的实际应用效果,全固态超级电容器(ASC)分别使用CaMoO₄/GO和活性炭(AC)作为正极和负极进行组装。组装的ASC在功率密度1710.3 W/kg下显示出25.18 W·h·kg^-1的能量密度,并且能通过串联4个ASC为红色发光二极管供电。上述结果表明CaMoO₄/GO电极材料在高性能储能设备的应用中具有非常大的潜力。

Preparation of the CaMoO4/GO Composites and Their Supercapacitor Performances

CaMoO₄/graphene oxide(GO)nanocomposites were successfully synthesized by the hydrothermal method,and the synthesized nanocomposites were investigated by the surface morphology,crystal structure and electrochemical performance of the materials.The results show that the specific capacitance of the CaMoO₄/GO electrodes can be up to 571.82 F/g at a current density of 0.5 A/g,and a specific capacitance retention rate is still 84%after 1000 cycles at a current density of 1 A/g.To test the practical application effect of the electrode material,all solid supercapacitors(ASCs)were assembled by using CaMoO₄/GO and activated carbon(AC)as positive and negative electrodes,respectively.The assembled ASCs display an energy density of 25.18 W·h·kg^-1at a power density of 1710.3 W/kg.A red LED is powered with series-connected four ASCs.The above results indicate the great potential of the CaMoO₄/GO electrode material for the application of high performance energy storage equipment.