Preparation and characterization of aligned carbon nanotube-ruthenium oxide nanocomposites for supercapacitors.
Preparation and characterization of aligned carbon nanotube-ruthenium oxide nanocomposites for supercapacitors.
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DOI：
10.1002/smll.200400137
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发表时间：
2005-05
期刊：
影响因子：
13.3
通讯作者：
Jianshan Ye;Hui Cui;Xiao Liu;T. Lim;Wei‐De Zhang;F. Sheu
中科院分区：
文献类型：
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作者：
Jianshan Ye;Hui Cui;Xiao Liu;T. Lim;Wei‐De Zhang;F. Sheu
制备了一种新型的氧化钌（RuO（2））修饰多壁碳纳米管（MWNT）纳米复合电极（RuO（2）/MWNT）用于超级电容器。通过在Ar/O（2）气氛中通过磁控溅射将Ru沉积到MWNTs上形成纳米复合材料，MWNTs通过化学气相沉积在Ta板上合成。采用循环伏安法、计时电位法和电化学阻抗法研究了RuO（2）/MWNT纳米复合电极的电化学性能。在1.0 M H（2）SO（4）中，通过RuO（2）修饰，MWNT电极的电容从0.35 mF cm（-2）显著增加到16.94 mF cm（-2）。透射电子显微镜（TEM）和扫描电子显微镜（SEM）观察表明，纳米管表面的RuO（2）膜由小晶粒组成，具有倾斜的斜纹状微结构。结果表明，一种很有前途的路线，制备RuO（2）/MWNT基双层超级电容器。
A novel type of ruthenium oxide (RuO(2))-modified multi-walled carbon nanotube (MWNT) nanocomposite electrode (RuO(2)/MWNT) for supercapacitors has been prepared. The nanocomposites were formed by depositing Ru by magnetic-sputtering in an Ar/O(2) atmosphere onto MWNTs, which were synthesized on Ta plates by chemical vapor deposition. Cyclic voltammetry, chronopotentiometry, and electrochemical impedance measurements were applied to investigate the performance of the RuO(2)/MWNT nanocomposite electrodes. The capacitance of the MWNT electrodes in 1.0 M H(2)SO(4) is significantly increased from 0.35 to 16.94 mF cm(-2) by modification with RuO(2). The RuO(2) film on the surface of the nanotubes is composed of small crystal grains with tilted bundle-like microstructures, as observed by transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The results demonstrate a promising route to prepare RuO(2)/MWNT-based double-layer supercapacitors.