不同氧化剂制备石墨烯-聚苯胺超级电容器材料

Preparation of Graphene-PANI Supercapacitor Materials by Different Oxidizing Agents

以水热合成多孔石墨烯为载体,以廉价环保的β-MnO_2代替传统的具有污染性的过硫酸铵为氧化剂,采用原位聚合法制备了石墨烯-聚苯胺超级电容器材料。利用X射线衍射(XRD)、傅里叶红外光谱仪(FT-IR)、扫描电子显微镜(SEM)、循环伏安、恒流充放电及交流阻抗等对其微观形态和电化学性质进行了分析。结果表明,以β-MnO_2为氧化剂制备的石墨烯-聚苯胺超级电容器材料的比电容能达到350F/g,电容保持率为67.7%,具有更好的电化学特性。

Porous graphene was prepared by hydrothermal method,and grapheme-polyanline（PANI）composites were synthesized in the dispersion system of porous graphene by in-situ polymerization using low-priced eco-friendlyβ-MnO_2 instead of the traditional polluting ammonium peroxydisulphate as chemical oxidant.The microstructures and electrochemical performance of the composites were characterized by X-Ray Diffraction Spectroscopy（XRD）,Fourier Transform Infrared Spectroscopy（FT-IR）,Scanning Electron Microscopy（SEM）,Cyclic Voltammetry（CV）,galvanostatic charge-discharge measurements and electrochemical impedance measurements.Results show that the specific capacitances of the graphemePANI composite synthesized usingβ-MnO_2 as oxidant 350F/g,and its capacitance retention is 67.7%,which has better electrochemical properties.