Abstract Fe3+ doping is used to enhance the capacity of polythiophene as supercapacitor electrode and the flexible Fe3+ doped PTh electrode on carbon cloth is prepared with an electrochemical deposition method. The successful doping of Fe3+ is confirmed by IR, XPS, and EDS measurements. The electrochemical performance of the PTh electrode is evaluated using cyclic voltammetry, galvanostatic charge-discharge technique, and electrochemical impedance spectroscopy in acidic aqueous electrolyte. The pristine PTh exhibits specific capacitance of 77.2 F g−1 at a current density of 0.5 A g−1. After Fe3+ doping, the specific capacitance is improved to 108.1 F g−1 and the retention rate also improved from 7.8% to 21.2% after 1000 charge-discharge circles.

中文翻译：

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Fe 3+ 掺杂对超级电容器柔性聚噻吩电极的影响

摘要 Fe3+掺杂用于提高聚噻吩作为超级电容器电极的容量，采用电化学沉积方法在碳布上制备了柔性Fe3+掺杂PTh电极。Fe3+ 的成功掺杂由 IR、XPS 和 EDS 测量证实。使用循环伏安法、恒电流充放电技术和电化学阻抗谱在酸性水性电解质中评估 PTh 电极的电化学性能。原始 PTh 在 0.5 A g-1 的电流密度下表现出 77.2 F g-1 的比电容。Fe3+掺杂后，比电容提高到108.1 F g-1，1000次充放电循环后保持率也从7.8%提高到21.2%。