【作者】 孟越； 王林萍； 张松柏； 黄勇； 谢青季；

【Author】 Yue Meng;Linping Wang;Songbai Zhang;Yong Huang;Qingji Xie;College of Chemistry and Materials Engineering, Hunan University of Arts and Science;College of Chemistry and Chemical Engineering, Hunan Normal University;

【机构】 湖南文理学院化学与材料工程学院； 湖南师范大学化学化工学院；

【摘要】 采用两步电化学法制备了RuO₂和羧基化石墨烯（RuO₂-CG）复合物。首先,将石英晶体微天平（QCM）金电极置于搅拌的RuCl₃、羧基化石墨烯（CG）和H₂SO₄分散液中,-0.25V vs SCE下电沉积制得Ru-CG复合物,再在0.5 M硫酸溶液中循环伏安氧化Ru-CG复合物制得RuO₂–CG/QCM电极。研究了电极的超级电容性能,比电容达756 F g^-1,高于很多已有RuO₂基电极^[1-3],能量密度为101 Wh kg^-1(功率密度为2.5 kW kg^-1时),稳定性好。更多还原

【Abstract】 Ruthenium and carboxylated graphene（CG） were coelectrodeposited at-0.25 V vs SCE on a quartz crystal microbalance（QCM） Au electrode in a stirred aqueous dispersion containing RuCl₃, CG and H₂SO₄.The Ru–CG composite was electrooxidized by cyclic voltammetry in 0.5 M aqueous H₂SO₄ to yield a RuO₂–CG/QCM electrode for supercapacitor research.The RuO₂–CG/QCM electrode exhibited an apparent specific capacitance of 756 F g^-1, an energy density of 101 Wh kg^-1 at a power density of 2.5 kW kg^-1, and high stability.The specific capacitance is higher than many reported RuO₂–based electrodes.The present method for preparation of RuO₂–CG composite film only needs two simple electrochemical processes（solution–stirred composite electrodeposition and then a solution–quiescent anodic treatment）, which is promising for facile preparation of other similar nanocomposite films for wider applications.更多还原