电化学法制备的聚苯胺/石墨烯复合材料的微结构及性能研究
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摘要
采用电化学方法制备出聚苯胺/石墨烯复合材料,并通过扫描电子显微镜(SEM)、傅里叶红外光谱仪(FT-IR)、紫外-可见分光光度计(UV-Vis)对氧化石墨烯、聚苯胺和聚苯胺/石墨烯复合材料的结构进行表征。结果表明,聚苯胺纳米颗粒均匀分布在石墨烯片层间。聚苯胺/石墨烯复合材料的比电容最大为238 F/g。循环1 000次以后,聚苯胺的电容衰减24. 5%,而复合材料的电容衰减15%。与聚苯胺相比,聚苯胺/石墨烯复合材料的电容量高、循环稳定性好,电导率从5 S/cm提高到10 S/cm。
Polyaniline/graphene composites are prepared by electrochemical method. The structures of graphene oxide,polyaniline and the prepared polyaniline/graphene composites are characterized by scanning electron microscopy(SEM),Fourier transform infrared spectroscopy(FT-IR) and UV-Vis spectrophotometer. The results show that polyaniline particles distribute evenly between the graphene sheets.The maximum capacitance of the composites can reach238 F·g-1. The capacitance of the polyaniline decreases by 24. 5% after cycling for 1 000 times,and that of the polyaniline/graphene composite decreases by 15% only.The capacitance and cycle stability of the polyaniline/graphene composite is more excellent than that of polyaniline. Its conductivity is 10 S·cm-1 compared with the 5 S·cm-1 of polyaniline.
Polyaniline/graphene composites are prepared by electrochemical method. The structures of graphene oxide,polyaniline and the prepared polyaniline/graphene composites are characterized by scanning electron microscopy(SEM),Fourier transform infrared spectroscopy(FT-IR) and UV-Vis spectrophotometer. The results show that polyaniline particles distribute evenly between the graphene sheets.The maximum capacitance of the composites can reach238 F·g-1. The capacitance of the polyaniline decreases by 24. 5% after cycling for 1 000 times,and that of the polyaniline/graphene composite decreases by 15% only.The capacitance and cycle stability of the polyaniline/graphene composite is more excellent than that of polyaniline. Its conductivity is 10 S·cm-1 compared with the 5 S·cm-1 of polyaniline.
引文
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[4]Dai Y M,Tang S C,Vongehr S,et al. Silver nanoparticle-induced growth of nanowire-covered porous MnO2spheres with superior supercapacitance[J].ACS Sustainable Chem Eng,2014,2:692-698.
[5]Ramya R,Sangaranarayanan M V. Analysis of polypyrrole-coated stainless steel electrodes-estimation of specific capacitances and construction of equivalent circuits[J].J Cheml Sci,2008,120(1):25-31.
[6]Liu R,Cho S I,Lee S B.Poly(3,4-ethylenedioxythiophene)nanotubes as electrode materials for a high-powered supercapacitor[J].Nanotechnology,2008,19:215710.
[7]Wang Q,QiuS,Wang S,et al.Graphene oxide/polyaniline nanotube composites synthesized in alkaline aqueous solution[J].Synth Met,2015,210:314-322.
[8]Wang S,Shang J,Wang Q,et al.Enhanced electrochemical performance by strongly anchoring highly crystalline polyaniline on multiwalled carbon nanotubes[J]. ACS Appl Mater Inter,2017,9:43939-43949.
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[10]Hummers W S,Offeman R E.Preparation of graphitic oxide.Preparation of graphitic oxide[J]. J Am Chem Soc,1958,80:1339-1339.