期刊
ELECTROCHIMICA ACTA
卷 56, 期 2, 页码 732-736出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2010.09.092
关键词
Cobalt oxide (Co3O4) nanotubes; Anodic aluminum oxide (AAO) template; Supercapacitors
资金
- National Science Foundation of China [21003015]
- Natural Science Foundation of Jiangsu Province [BK2008543]
- Study Abroad Foundation of Jiangsu Province
- Fine Petroleum Chemical Key Laboratories Foundation of Jiangsu Province [KF0701]
Cobalt oxide (Co3O4) nanotubes have been successfully synthesized by chemically depositing cobalt hydroxide in anodic aluminum oxide (AAO) templates and thermally annealing at 500 degrees C. The synthesized nanotubes have been characterized by scanning electron microscope (SEM), transmission electron microscope (TEM) and X-ray diffraction (XRD). The electrochemical capacitance behavior of the Co3O4 nanotubes electrode was investigated by cyclic voltammetry, galvanostatic charge-discharge studies and electrochemical impedance spectroscopy in 6 mol L-1 KOH solution. The electrochemical data demonstrate that the Co3O4 nanotubes display good capacitive behavior with a specific capacitance of 574 F g(-1) at a current density of 0.1 A g(-1) and a good specific capacitance retention of ca. 95% after 1000 continuous charge-discharge cycles, indicating that the Co3O4 nanotubes can be promising electroactive materials for supercapacitor. Published by Elsevier Ltd.
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