掺钌氢氧化钴复合材料在碱液中的电化学行为  

Electrochemical Behavior of Co-Ru Composite in Alkaline Solution

作　　者：姚素梅[1] 李国春[1] 高学平[1] 

机构地区：[1]南开大学新能源材料化学研究所,天津300071

出　　处：《电化学》2010年第1期56-59,共4页Journal of Electrochemistry

基　　金：国家973计划项目(2009CB220100)资助

摘　　要：应用化学共沉淀法制备掺钌氢氧化钴复合材料,X射线衍射(XRD)、扫描电子显微镜(SEM)显示非晶态RuO2颗粒分散在六方晶系Co(OH)2薄片的表面.循环伏安、恒流充放电测试表明,Co/Ru=8/1的复合材料在碱性电解液中具有优良的电容性能和较高的比容量.The electrochemical properties of Ru doped cobalt hydroxides synthesized via homogeneous chemical co-precipitation were investigated in 6 tool·L^-1 KOH solution by galvanostatic charge-discharge process and cyclic voltammetry （CV）. It is demonstrated that Ru doped cobalt hydroxides exhibited good capacitive characteristic and high specific capacitance. The sample with a Co/Ru molar ratio of 8/1 shows the optimized electrochemical performance,including capacitive property and discharge capacity. The microstructure and morphology of the obtained Ru doped hydroxides were characterized by X-ray diffraction （XRD） and scanning electron microscope （SEM）. The amorphous structure of ruthenium dioxide nanoparticles and single-crystal structure of Co （OH） 2 platelets were confirmed. Based on a structure analysis and electrochemical measurement, the reversible faradic reaction within electroactive materials is dominant for the capacitive characteristic and high capacity.

关 键 词：掺钌氢氧化钴复合材料 碱性溶液 电化学行为 电容性能 

分 类 号：TB332[一般工业技术—材料科学与工程]