氧化钌/纳米石墨复合电极材料的制备及电学性能研究

Preparation of RuO_2/nano-C Composite Electrode Material and Study on Its Electrical Properties

以纳米石墨为基体,通过乙醇钌水解、过饱和非均相沉淀获得纳米级RuO2,并包覆沉积于石墨表面,制备新型纳米RuO2/nano-C复合电极材料。X射线衍射(XRD)、透射电子显微镜(TEM)和能谱(EDS)分析表明:醇钌盐水解后生成的氧化钌主要是以非晶态RuO2·xH2O的形式包覆在纳米石墨上。循环伏安曲线测试表明:复合电极材料在充放电过程中包含了碳双电层的储电机理和氧化钌氧化还原反应的储电机理,乙醇钌浓度为0.12mol·L-1的比容量为314F·g-1。

With Nano-C as the matrix,nanoscale RuO2 was gained through hydrolysis of alcohol ruthenium,supersaturation and heterogeneous precipitation and deposited on the surface of graphite.In this way,New RuO2/nano-C composite electrode material was prepared.XRD,TEM and EDS analyses show that after hydrolysis of alcohol ruthenium,RuO2 is mainly coated on nano-C in the form of RuO2·xH2O.Cyclic voltammetry curve test indicates that in the process of electric charge and discharge,composite electrode material contains electricity storage mechanism of carbon dual electrode layer and electricity storage mechanism of RuO2 redox reaction.The specific capacity is 314 F·g-1 when the concentration of alcohol ruthenium is 0.12mol·L-1.