Preparation and characterization of RuO<,2>·xH<,2>O/carbon aerogel composites for supercapacitors

摘要：

A series of RuO<,2>·xH<,2>O/carbon aerogel (CA) composite electrode materials were prepared by a chemical precipitation method. To accelerate the reaction and improve the dispersion of RuO<,2>·xH<,2>O particles on the surface of carbon aerogel, an ultrasonic wave was used. The structure and morphology of as- prepared composite were characterized by N2 adsorption, X-ray diffraction and field-emission scanning electron microscopy. The results showed that carbon aerogels had a pearly network structure and the composites had a relatively high specific surface area and mesopore volume. The electrochemical performance of the composite electrodes was studied by cyclic voltammetry, galvanostatic charge/discharge measurements and electrochemical impedance measurements. The results indicated a substantial increment of the specific capacitance of carbon aerogel. Moreover, the utilization efficiency of RuO<,2>·xH<,2>O was improved greatly by loading them on the conductive and porous carbon aerogel due to the significant improvement in inter-particle electronic conductivity and the extensive mesoporous network of the composites.

关键词： Carbon aerogel RuO<,2>·xH<,2>O/CA composite Electrochemical properties

作者: Jun Li Xianyou Wang Qinghua Huang Chunling Dai Sergio Gamboa P. J. Sebastian

作者单位: College of Chemistry, Xiangtan University, Hunan 411105, China Solar-Hydrogen-Fuel Cell Group, CIE-UNAM, Temixco 62580, Morelos, Mexico

会议类型: 国际会议

会议名称: 第二届亚洲化学电源会议(Second Asian Conference on Electrochemical Power Sources)

会议地点: 上海

会议语种:英文

页码: 120

在线出版日期: 2007-10-21（万方平台首次上网日期，不代表论文的发表时间）