三维多孔结构聚苯胺/石墨烯复合材料的制备及电化学性能

以自制聚苯胺水凝胶和氧化石墨烯为原料采用原位聚合法和溶液灌注法制备三维多孔结构的聚苯胺/氧化石墨烯复合材料,然后在氢碘酸的还原下制备聚苯胺/石墨烯复合材料。采用红外光谱法、场发射扫描电子显微镜和热重分析法对制备的复合材料的结构、形貌和组成进行表征,并采用三电极测试方式对其电化学性能进行测试。结果表明,氧化石墨烯的掺入能有效防止聚苯胺和氧化石墨烯的团聚和堆叠问题,获得了具有良好三维多孔结构的聚苯胺/氧化石墨烯复合物;聚苯胺/氧化石墨烯复合材料被氢碘酸还原后,得到的聚苯胺/石墨烯复合材料的热稳定性有所降低,但其比电容和导电性等有了很大的提高,在电流密度为0.5 A/g时,PANI/GO和PANI/r GO的比电容分别为240.38 F/g和321.91F/g。

Fabrication of Polyaniline/Graphene Composite with 3D Porous Structures and Its Electrochemical Performance

3D porous polyaniline/graphene oxide (PAN I/GO) composites were prepared by in-situ polymerization and solution pouring method using polyaniline hydrogel and graphene oxide prepared in our laboratory,then the polyaniline/reduced graphene oxide(PANI/rGO) composite was synthesized by the reduction of hydroiodic acid.The structure,morphology and composition of PANI/GO and materials were characterized by infrared spectroscopy(IR),field emission scanning electron microscope (FESEM) and thermogravimetric analysis (TGA);and the electrochemical performances were performed on three-electrode system.The results demonstrate that the agglomeration and stack of polyaniline and graphene oxide could be effectively prevented by incorporation of graphene oxide and the PANI/GO composite with favorable 3D porous structure was obtained.The thermostability of PANI/rGO composite after the reduction of PANI/GO drops down to a certain extent,but the electrical conductivity is improved greatly.The specific capacitances of PANI/GO and PANI/rGO composite are 240.38 F/g and 321.91 F/g,respectively,at the current density of 0.5 A/g.