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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 graphene / MnO 2 composites were successfully prepared by hydrothermal method at 160 ℃ .The materials were characterized by field emission scanning electron microscopy, transmission electron microscopy, X-ray diffraction, X-ray energy dispersive spectroscopy, BET method and Raman spectroscopy The results show that accordion-like manganese dioxide has a very efficient bonding with layered graphene and this innovative design effectively utilizes the high conductivity, large specific surface area, and excellent pseudocapacitance of manganese dioxide The results of electrochemical tests show that the specific capacitance of the sample is as high as 138 F · g -1 at 0.2 A · g -1, which is several times higher than that of the sample of manganese dioxide or graphene alone.