论文采用电化学沉积-电泳沉积(ELD-EPD)与化学气相沉积(CVD)相结合的方法制备出三维石墨烯-碳纳米管-二氧化锰(3D GR-CNT-MnO2)复合材料,首先通过ELD-EPD法合成三维氧化石墨烯-二氧化锰(3D GO-MnO2)复合结构,然后通过CVD法在GO-MnO2复合结构表面生长碳纳米管并同步还原GO制备出3D GR-CNT-MnO2复合材料,可为载流子提供高速通道并具有良好的赝电容效应。采用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线衍射仪(XRD)、拉曼光谱仪(Raman Spectrometer)等测试设备对复合材料的微观形貌及结构进行分析表征。将复合材料作为电极材料组装成超级电容器并测试其电化学性能,结果表明3D复合材料在200 mV s-1的扫描速率下,比电容达到330.75 F g-1,能量密度为36.68 Wh kg-1,功率密度为8000 W kg-1。在400 mV s-1的超高扫描速率下,仍具有226.35 F g-1比电容,经过1000次伏安循环稳定性测试后,比电容仅仅损失了5%,显示出优异的电化学性能。
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E-mail: meeting@c-gia.org
Abstract: Minyang Lu
Sponsor: Wenyang Yang
Media: Liping Wang
Operated by:China Innovation Alliance of the Graphene Industry