以二氧化锰(MnO2)为氧化剂,通过乳液聚合法室温条件下制备了十二烷基苯磺酸钠(SDBS)、十二烷基磺酸钠(SDS)、曲拉通(T-X100)掺杂的聚苯胺(PANI-SDBS、PANI-SDS、PANI-T-X100)。并采用扫描电子显微镜(SEM)、傅立叶变换红外光谱(FT-IR)以及X射线衍射(XRD)对其结构和形貌进行了表征。以掺杂PANI为活性物质制备电极,1.0mol/L H2 SO4水溶液为电解液组装超级电容器,用循环伏安法(CV)、电化学阻抗(EIS)和恒电流充放电技术分别测试了掺杂 PANI 电化学性能。结果表明,以 PANI-SDBS、PANI-T-X100为电极材料的超级电容器在5mA/cm2放电电流下的比电容为393、339F/g,均高于未掺杂PANI的比电容(228F/g),1000次循环后的比电容仍高于未掺杂 PANI。其中 PANI-SDBS 纤维纳米材料具有较高的比容量和良好的循环性能。
In this paper,doped polyaniline (abbr.PANI)was prepared by using emulsion polymerization method and using MnO2 as the oxidant,adding surfactant (SDBS,SDS,T-X100)at ambient temperature.The mor-phology and structure of doped PANI (PANI-SDBS,PANI-SDS,PANI-T-X100)were characterized by scan-ning electron microscopy (SEM),Fourier transform infrared spectroscopy (FT-IR)and X-ray diffraction (XRD).Symmetric redox supercapacitor was assembled with the doped PANI as active electrode material and 1.0mol/L H2 SO4 aqueous solution as electrolyte.The electochemical performance of these supercapacitors was investigated by cyclic voltammetry (CV),electrochemical impedence (EIS)and galvanostatic charge-discharge. These results showed that the specific capacitance of PANI-SDBS and PANI-T-X100 was about 393 and 339F/g at the current density of 5mA/cm2 ,respectively,which was higher than that of PANI (228F/g).After 1000 charge-discharge cycles the specific capacitance of PANI-SDBS was still higher than that of PANI.Among them PANI-SDBS fiber nanomaterial had higher specific capacitance and better cycle performance.
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