| RuO2·xH2O / MWNTs纳米复合物的超级电容特性研究 |
| Supercapacitive Properties of Hydrous Ruthenium Oxide/Multi-walled Carbon Nanotubes Nanocomposite |
|
| 摘要: 本文采用超声波技术合成了水合氧化钌/多壁碳纳米管纳米复合材料(Ru-MWNTs)前驱物，在150 ℃下热处理15 h后得到Ru-MWNTs。采用XRD及TEM对纳米复合材料进行表征，结果表明，水合氧化钌以无定型态比较均匀地沉积在MWNTs上。在1.0 mol·L-1 H2SO4电解液中对Ru-MWNTs复合电极进行了电化学测试，循环伏安结果表明纳米复合物具有良好的电容性能，其比容量为100 F·g-1，是MWNTs的6倍(MWNTs的比容量为15.5 F·g-1)；本文还采用交流阻抗方法来分析频率与电容的关系，比较分析了MWNTs和复合材料的孔结构，表明在MWNTs中复合少量的水合氧化钌可以提高电极材料的充、放电速度。 |
| 关键词: 超级电容器 水合氧化钌 多壁碳纳米管 复合物 |
| 基金项目: |
| Abstract: The ruthenium oxide-multiwalled carbon nanotubes composite (Ru-MWNTs) has been formed by ultrasonic synthesis process. The composite material was obtained by mixing aqueous solution of RuCl3·3H2O, active carbon and NaHCO3 under ultrasonic and heat treatment at 150 ℃ for 15 h. The Ru-MWNTs was characterized by XRD,TEM, electrochemical impedance spectroscopy(EIS) and cyclic voltammetry(CV). The results indicate that hydrous ruthenium oxide particles in an amorphous phase were deposited homogeneously on MWNTs. The composite electrode material has good super-capacitive behaviors in 1.0 mol·L-1 H2SO4 electrolyte. The specific capacitance MWNTs electrode is 15.5 F·g-1. The specific capacitance of the composite is 100 F·g-1, which is four times higher than that of MWNTs. Electrochemical impedance spectroscopy results exhibit that the porous structure of the composite facilitates penetration of electrolyte and the rate capability is enhanced by introduction of hydrous ruthenium oxide. |
| Keywords: supercapacitor hydrous ruthenium oxide MWNTs composite |
| |
| 摘要点击次数: 1072 |
| 全文下载次数: 1490 |
| 郑言贞,张密林,陈野.RuO2·xH2O / MWNTs纳米复合物的超级电容特性研究[J].无机化学学报,2007,23(4):630-634. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| Support information: |
|
|
|
|
|
|
