Abstract A green electrochemical approach is developed for the fabrication of polyaniline (PANI) nanofiber and carbon quantum dots (C-dots) nanoparticles. In this regard, C-dots were manufactured by DC power supply by 2 Pt plates in ethanol and NaOH solution. While, PANI was synthesized by chronopotentiometry using a 3-electrode compartment system in aniline and SDS solution. The C-dots/PANI composite was prepared via adsorption of C-dots on PANI to be produced PANI as a core and C-dots as a shell, due to the electrostatic adsorption of carboxylic groups of C-dots on PANI. The acquired composite material shows good performance for supercapacitors with a high specific capacity of 264.6 F g−1 at a current density of 2.5 A g−1. The long term studies conducted on materials show that the composite based on (C-dot/PANI) remain high stability up to the tested 5000 charge–discharge cycles. The results from double-layer capacitance, cyclic voltammetry, and the impedance test display that the addition of C-dots to the PANI matrix can enhance the charge transport manner, which leads to higher supercapacitor property of the composite materials.

中文翻译：

---

用于超级电容器的核壳聚苯胺功能化碳量子点

摘要 开发了一种用于制备聚苯胺 (PANI) 纳米纤维和碳量子点 (C-dots) 纳米粒子的绿色电化学方法。在这方面，C-dots 是由 2 个 Pt 板在乙醇和 NaOH 溶液中通过直流电源制造的。同时，PANI 是通过计时电位法在苯胺和 SDS 溶液中使用 3 电极隔室系统合成的。由于C-dots的羧基在PANI上的静电吸附，C-dots/PANI复合材料通过将C-dots吸附在PANI上制备PANI作为核和C-dots作为壳。所获得的复合材料在 2.5 A g-1 的电流密度下具有 264.6 F g-1 的高比容量，显示出良好的超级电容器性能。对材料进行的长期研究表明，基于（C-dot/PANI）的复合材料在经过 5000 次充放电循环测试后仍保持高稳定性。双层电容、循环伏安法和阻抗测试结果表明，在PANI基体中加入C-dots可以增强电荷传输方式，从而使复合材料具有更高的超级电容器性能。