二氧化钌/石墨烯纳米复合材料的制备及其电化学性能

采用共沉淀法制备了二氧化钌/石墨烯纳米复合材料应用于超级电容器中,并利用扫描电镜(SEM)、透射电镜(TEM)以及X射线衍射(XRD)对材料表面结构形貌进行了分析.将电极材料装配成极片,组装成超级电容器并进行电化学性能测试,实验表明,含有质量分数为5％石墨烯的复合材料表现出很好的电化学性能,该材料单极首次放电比容量有740 F· g-1;在2A·g-1的电流密度下,8000次深度循环后容量保持率为71％且具有很好的稳定性,比容量和循环性能都要优于纯的氧化钌材料,表明合成的复合材料适合用于超级电容器中.

Preparation and electrochemical characterization of RuO2-Graphene nano—composites

RuO2/Graphene nano-composite materials for supercapacitor were prepared by co-precipitation method.The morphology and structure of the composites were investigated through scanning electron microscopy(SEM),transmission electron microscopy(TEM) and X-ray diffraction(XRD).The materials were coated onto electrode as laminates and assembled into supercapacitors.Electrochemical measurements showed that the composites with 5% wt graphene exhibited good electrochemical performance,and its initial specific capacitance of the composite electrode was 740 F·g-1.Under 2A·g-1 current density and after 8000 deep cycles,the specific capacitance of RuO2/Graphene composite could still retain 71%.The specific capacity and cycle life performance of the RuO2/Graphene composite was found to be much better than the pure RuO2 materials’,which indicated that the composite material might be a good candidate electrode for supercapacitors.