Abstract Reduced graphite oxide (RGO) is prospective for application as an active material for supercapacitor electrodes due to the simple synthesis, the high specific surface area and the presence of oxygen-containing functional groups. Functionalization of such materials affects hydrophilicity, surface morphology and contributes to the redox processes when potential is applied. In this article RGO was treatment by mixture of potassium hydroxide and chloroacetic acid; hydrobromic acid and oxalic acid; in various ratio of strong nitric, sulfuric and phosphoric acids. Such functionalization of RGO leads to decrease in particle size, increase the quantity of oxygen-containing groups on the surface of the materials and affects the change of carbon hybridization from sp2 to sp3. Furthermore, all the samples were investigated by cyclic voltammetry (CV) to study the redox processes occurring on the electrode material surface. The peaks on the CV curves were compared with the corresponding redox reversible reactions. Furthermore, the specific capacity of all samples was calculated. Thus, at low carboxylation level of RGO specific capacity is increased due to significant contribution of redox processes while high functionalization leads to decrease in conductivity and, as well in specific capacity.

中文翻译：

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改性还原氧化石墨的功能组成

摘要 还原氧化石墨（RGO）由于合成简单、比表面积高和含氧官能团的存在，有望用作超级电容器电极的活性材料。此类材料的功能化会影响亲水性、表面形态，并在施加电位时促进氧化还原过程。本文中RGO是用氢氧化钾和氯乙酸的混合物处理；氢溴酸和草酸；在各种比例的强硝酸、硫酸和磷酸中。RGO的这种功能化导致颗粒尺寸减小，材料表面含氧基团的数量增加，并影响碳杂化从sp2到sp3的变化。此外，所有样品均通过循环伏安法 (CV) 进行研究，以研究发生在电极材料表面的氧化还原过程。将 CV 曲线上的峰与相应的氧化还原可逆反应进行比较。此外，计算了所有样品的比容量。因此，在低羧化水平下，由于氧化还原过程的显着贡献，RGO 比容量增加，而高官能化导致电导率和比容量降低。