One-step electrochemical synthesis of polypyrrole-vanadium oxide (PPy-VOx) composites was performed on the Vanadium-intercalated pencil graphite (PG) surface in an acetonitrile solution with the presence of carboxymethyl cellulose (CMC). Both intercalated surface and composite coating were characterized using SEM-EDX Spectroscopy and X-Ray Diffraction (XRD) techniques. The capacitive properties of the coating were elaborated in an H₂SO₄/water medium using galvanostatic charge–discharge, potential cycling, and electrochemical impedance spectroscopy methods in comparison with the coatings prepared without additives. While V-intercalation provides a significant increase in the specific capacitance, the carboxymethyl cellulose enhances the cyclic performance of the composite. The improvement at the capacitance of the composite may be due to the homogenous distribution as well as the synergetic effect between PPy and VO_x. The capacitive properties were studied in aqueous solutions of H₂SO₄ and Li₂SO₄, and in an acetonitrile solution of HBF₄/TBABF₄. The specific capacitance value of the composite coating on the V-intercalated pencil graphite was determined as 204 F g⁻¹ in an acetonitrile solution of HBF₄/TBABF₄ for a mass loading of 10.0 mg cm⁻² at 2.0 A g⁻¹, when the capacitance of bare graphite was subtracted. The two-electrode supercapacitors composed of both asymmetric and symmetric configurations were also prepared and examined in an acetonitrile/adiponitrile solution of HBF₄/TBABF₄. The charge–discharge results for asymmetric supercapacitor reveal that the PPy-VO_x-CMC composite coating (20 mg cm⁻²) on V-intercalated graphite paper represents a high energy density of 18 Wh.kg⁻¹ and a high power density of 0.43 kW kg^-1 at 0.5 A g⁻¹, as well as a stable cycle life at the potential range of 1.2 V.

在乙腈溶液中，在羧甲基纤维素（CMC）存在的情况下，在钒插层的铅笔状石墨（PG）表面上进行了聚吡咯-钒氧化物（PPy-VOx）复合材料的一步电化学合成。使用SEM-EDX光谱和X射线衍射（XRD）技术对插入的表面涂层和复合涂层进行了表征。在H ₂ SO ₄中详细说明了涂层的电容性质/水介质中使用恒电流充放电，电势循环和电化学阻抗谱方法，与未添加添加剂的涂层相比。V插层可显着提高比电容，而羧甲基纤维素可增强复合材料的循环性能。复合材料电容的提高可能是由于PPy和VO _x之间的均匀分布以及协同效应。在H ₂ SO ₄和Li ₂ SO ₄的水溶液以及HBF ₄ / TBABF ₄的乙腈溶液中研究了电容性能。被确定为204 F G在V插层石墨铅笔复合涂层的比电容值^-1在HBF的乙腈溶液₄ / TBABF ₄为10.0毫克厘米的质量负载^-2 在2.0 A克^-1，当减去裸石墨的电容时。还制备了由不对称和对称构型组成的双电极超级电容器，并在HBF ₄ / TBABF ₄的乙腈/脂环二腈溶液中进行了检查。不对称超级电容器的充放电结果表明，PPy-VO _x -CMC复合涂层（20 mg cm ^-2）上V-插层石墨纸18表示的Wh.kg高能量密度^-1和0.43千瓦公斤的高功率密度^-1 在0.5 A克^-1以1.2的电势范围，以及一个稳定的循环寿命V.