通过原位化学氧化聚合和热解方法合成了聚(3,4-亚乙基二氧噻吩)(PEDOT)和PEDOT官能化的碳纳米颗粒(f-CNPs)。f-CNP-PEDOT纳米复合材料是通过将PEDOT的浓度从1至20重量%(即,1、2.5、5、10和20重量%)。几种表征技术,如场发射扫描电子显微镜(FESEM),衰减全反射-傅里叶变换红外(ATR-FTIR),X射线衍射(XRD)N2Brunauer-Emmett-Teller(BET)和Barrett-Joyner-Halenda(BJH)分析,以及循环伏安法(CV),恒流充放电(GCD),和电化学阻抗谱(EIS),用于研究形态学,晶体结构,N2吸附/解吸能力,以及这些新合成的纳米复合材料的电化学性能。FESEM分析表明,这些纳米复合材料具有明确的多孔结构,和BET表面积分析表明,独立的f-CNP表现出801.6m2/g的最大表面积,而具有20wt%的f-CNP-PEDOT表现出116m2/g的最小表面积。BJH方法表明纳米复合材料主要是介孔的。CV,GCD,和EIS测量表明,与单独的f-CNPs和PEDOT成分相比,用5wt%PEDOT官能化的f-CNP具有更高的电容性能,表现出258.7F/g的非凡比电容,在0.25A/g的电流密度下,由于PEDOT掺杂增强的电化学活性的综合优势,f-CNPs孔隙度高度发达。使用掺杂有5wt%PEDOT的优化的f-CNP-PEDOT作为活性材料,制造了对称水性超级电容器器件。在1.4V时表现出96.7F/g的高电容,几乎持有他们的全部电荷,在2A/g下10,000次充放电循环后,从而提供最高的电极性能。此后,这项工作为f-CNP-PEDOT纳米复合材料在高能量密度超级电容器开发中的潜在用途铺平了道路。
Poly(3,4-ethylenedioxythiophene) (PEDOT) and PEDOT-functionalized carbon nanoparticles (f-CNPs) were synthesized by in situ chemical oxidative polymerization and pyrolysis methods. f-CNP-PEDOT nanocomposites were prepared by varying the concentration of PEDOT from 1 to 20% by weight (i.e., 1, 2.5, 5, 10, and 20 wt%). Several characterization techniques, such as field-emission scanning electron microscopy (FESEM), attenuated total reflectance-Fourier transform infrared (ATR-FTIR), X-ray diffraction (XRD), N2 Brunauer-Emmett-Teller (BET) and Barrett-Joyner-Halenda (BJH) analyses, as well as cyclic voltammetry (CV), galvanostatic charge discharge (GCD), and electrochemical impedance spectroscopy (EIS), were applied to investigate the morphology, the crystalline structure, the N2 adsorption/desorption capability, as well as the electrochemical properties of these new synthesized nanocomposite materials. FESEM analysis showed that these nanocomposites have defined porous structures, and BET surface area analysis showed that the standalone f-CNP exhibited the largest surface area of 801.6 m2/g, whereas the f-CNP-PEDOT with 20 wt% exhibited the smallest surface area of 116 m2/g. The BJH method showed that the nanocomposites were predominantly mesoporous. CV, GCD, and EIS measurements showed that f-CNP functionalized with 5 wt% PEDOT had a higher capacitive performance compared to the individual f-CNPs and PEDOT constituents, exhibiting an extraordinary specific capacitance of 258.7 F/g, at a current density of 0.25 A/g, due to the combined advantage of enhanced electrochemical activity induced by PEDOT doping, and highly developed porosity of f-CNPs. Symmetric aqueous supercapacitor devices were fabricated using the optimized f-CNP-PEDOT doped with 5 wt% of PEDOT as active material, exhibiting a high capacitance of 96.7 F/g at 1.4 V, holding practically their full charge, after 10,000 charge-discharge cycles at 2 A/g, thus providing the highest electrical electrodes performance. Hereafter, this work paves the way for the potential use of f-CNP-PEDOT nanocomposites in the development of high-energy-density supercapacitors.