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通过将吡咯单体在低温下与石墨烯量子点进行原位聚合,获得一种全新的聚吡咯/石墨烯量子点(PPY/GQD)复合材料.实验中采用了扫描电子显微镜(SEM)、原子力显微镜(AFM)、X射线衍射(XRD)、红外光谱(FT-IR)和热重分析(TGA)对复合物的表面形貌、结构进行表征.结果表明,吡咯单体以石墨烯量子点为软模板,以化学键的方式在石墨烯量子点的表面聚合生长成片状聚吡咯.通过机械冷压法将粉末状PPY/GQD复合物压成圆片电极.电极的电化学测试结果表明,PPY和GQD质量比为50:1所制得的复合物的电容量为485 F.g-1,同时在2000次循环之后电容量只降低了大约2%.通过与同比例的PG(聚吡咯/石墨烯复合材料)以及纯PPY对比,发现聚吡咯/石墨烯量子点的高比容量及优异的循环稳定性将会使其在电化学超级电容器领域中具有潜在的应用价值.
A new polypyrrole / graphene quantum dot (PPY / GQD) composite was obtained by in situ polymerization of pyrrole monomer with graphene quantum dots at low temperature.The scanning electron microscopy (SEM), atomic force The surface morphology and structure of the composite were characterized by scanning electron microscopy (AFM), X-ray diffraction (XRD), infrared spectroscopy (FT-IR) and thermal gravimetric analysis (TGA) .The results showed that the pyrrole monomer Soft template to chemically bond the surface of graphene quantum dots to grow into flake-like polypyrrole.The powdery PPY / GQD complex was pressed into a wafer electrode by mechanical cold pressing.The electrochemical test results of the electrode showed that PPY And GQD mass ratio of 50: 1, the capacity of the composite was 485 Fg-1, while the capacitance decreased by only about 2% after 2000 cycles. By comparing with the PG (polypyrrole / graphene) Composite) and pure PPY. It was found that the high specific capacitance of polypyrrole / graphene quantum dot and its excellent cycling stability will make it have potential applications in the field of electrochemical supercapacitors.