论文部分内容阅读
采用超临界CO_2流体辅助分散技术,合成制备了Fe_2O_3/石墨烯复合材料,通过透射电子显微镜(TEM)表征结果可以看出,Fe_2O_3纳米粒子均匀的负载于石墨烯片层之上,利用其与石墨烯的协同效应,改善各自的固有缺点,增强材料的性能。X-射线能谱(XPS)和X-射线衍射(XRD)结果表明Fe_2O_3和石墨烯之间复合较为完好,且石墨烯结构较为完整,能够大大提升复合材料的导电性。将制得的增强Fe_2O_3/石墨烯复合材料用于超级电容器电极材料,通过循环伏安(CV),恒电流充放电(GCD)和交流阻抗(EIS)测试可知,电容器表现出了优异的赝电容性能,在电流密度为1 A/g时,其比电容量可以达到596 F/g,显示了优异的电化学储能性能。
Fe 2 O 3 / graphene composites were synthesized by supercritical CO 2 fluid-assisted dispersion technique. The results of transmission electron microscopy (TEM) showed that the Fe 2 O 3 nanoparticles were uniformly loaded on the graphene sheets, The synergistic effect of olefins to improve their inherent shortcomings and enhance the performance of materials. The results of XPS and XRD show that the composite between Fe 2 O 3 and graphene is intact and the graphene structure is relatively intact, which can greatly enhance the conductivity of the composites. The prepared Fe_2O_3 / graphene composites were used in the electrode materials of supercapacitors. By cyclic voltammetry (CV), constant current charge and discharge (GCD) and alternating current impedance (EIS) tests, the capacitors showed excellent pseudocapacitance Performance, at a current density of 1 A / g, its specific capacitance can reach 596 F / g, shows excellent electrochemical energy storage performance.