对苯二胺/石墨烯复合材料的制备及其电化学性能研究

Preparation and electrochemical properties of p-phenylenediamine/graphene composite

以对苯二胺(PPD)为还原剂,采用一步水热法制备了对苯二胺/石墨烯(PRG)复合材料。研究了PPD用量对复合物形貌、层间距、以及电化学性能的影响。利用扫描电镜(SEM)、透射电镜(TEM)、原子力显微镜(AFM)、X射线衍射(XRD)、傅里叶变红外光谱(FT-IR)和拉曼光谱(Raman)对PRG的结构及形貌等性质进行了表征,采用三电极系统测了试样品的的电化学性能。结果表明,PRG复合物中碳原子层的厚度为0.4nm,横向尺寸约为1μm,最大底面间距为0.944 125nm。复合物电极表现为双层电容器和赝电容器特征,比电容量为320.50F/g,经过1 000次循环后比容量保持率为92%。阻抗谱表明石墨烯与PPD复合后能很好促进电荷的迁移。

The PPD/Graphene complexe(PRG)was prepaerd by hydrothermal process with p-phenylenediamine(PPD)as reducer.The effects of PPD content on the morphology,interlayer spacing and electrochemical properties of compound were investigated.The properties of structure and morphology of the compound were characterized by scanning electron microscopy(SEM),transmission electron microscopy(TEM),atomic force microscope(AFM),X ray diffraction(XRD),Fourier transform infrared spectroscopy(FT-IR)and Raman Spectra,and the electrochemical capability of the compound was tested by three electrode system.The results demonstrated that the thickness and the transverse size of graphene lay of the PRG are 0.4 nm and 1μm,and the maximum interlayer spacing of compound is 0.944125 nm.The composite electrode is characterized by double layer capacitor and pseudo capacitor with a specific capacitance of 320.50 F/g,and the specific retention rate is 92%after 1 000 cycles.The analyses of impedance spectra clearly indicated that compound was ideal than graphene in facilitating the migration/transfer of the charge.