石墨烯/二氧化锰复合材料的制备及其电化学性能  

Synthesis and electrochemical properties of graphene/MnO_2 composites

作　　者：周龙斐 邱红梅[1] 徐美[1] 路彦珍[1] 胡建玲[1] 王子娅 王凤平[1] 

机构地区：[1]北京科技大学数理学院,北京100083

出　　处：《工程科学学报》2016年第9期1300-1305,共6页Chinese Journal of Engineering

基　　金：中央高校基础科研基金资助项目(FRF-AS-13-004A;FRF-BR-14-024A);北京科技大学基本科研业务费资助项目(FRF-BR-14-024A);北京高等学校青年英才计划资助项目(YETP0390)

摘　　要：通过水热法在160℃条件下成功制备了手风琴状石墨烯/MnO_2复合材料.通过场发射扫描电镜、透射电镜、X射线衍射、X射线能量色散谱、BET法以及拉曼光谱对材料进行表征.结果表明,手风琴状二氧化锰与层状石墨烯之间具有十分高效的贴合,这种创新性设计有效地利用了石墨烯的高电导率、大比表面积以及二氧化锰的优秀赝电容行为.电化学测试结果给出在0.2 A·g^(-1)时,样品的比电容高达138 F·g^(-1),数倍增强于单独的二氧化锰或石墨烯样品.Accordion-like MnO2-coated graphene composites were successfully prepared by a facile hydrothermal method at 160℃. The as-products were characterized by field emission scanning electron microscopy, transmission electron microscopy, X-ray dif-fraction, energy dispersive spectrometry, BET and Raman spectroscopy. The high capacitance of 138 F·g-1 at 0. 2 A·g-1 is achieved with MnO2/graphene composites as a supercapacitor electrode, much higher than that of a single MnO2 or graphene electrode. The ex-cellent electrochemical performance is attributed to the uniform MnO2 nanosheet morphology, large surface area of graphene and stable chemical bonding of MnO2 on the graphene substrate.

关 键 词：二氧化锰 石墨烯 水热合成 超级电容器 

分 类 号：TB383[一般工业技术—材料科学与工程] TM53[电气工程—电器]