Preparation and properties of Co3O4 nanorods as supercapacitor material

被引:160
作者
Cui, Li [1 ]
Li, Juan [1 ,2 ]
Zhang, Xiao-Gang [3 ]
机构
[1] Xinjiang Univ, Coll Chem & Chem Engn, Urumqi 830046, Peoples R China
[2] Xi An Jiao Tong Univ, Sch Sci, Xian 710049, Peoples R China
[3] Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Technol, Nanjing 210016, Peoples R China
基金
中国国家自然科学基金;
关键词
Microwave-assisted hydrothermal synthesis; CTAB template; Co3O4; nanorods; Supercapacitor material; HYDROTHERMAL SYNTHESIS; FABRICATION; ELECTRODES; FILM; NIO;
D O I
10.1007/s10800-009-9891-5
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Co3O4 nanorods have been successfully synthesized by thermal decomposition of the precursor prepared via a facile and efficient microwave-assisted hydrothermal method, using cetyltrimethylammonium bromide (CTAB) with ordered chain structures as soft template for the first time. The obtained Co3O4 was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and electrochemical measurements. The results demonstrate that the as-synthesized nanorods are single crystalline with an average diameter of about 20 to 50 nm and length up to several micrometers. Preliminary electrochemical studies, including cyclic voltammetry (CV), galvanostatic charge-discharge, and electrochemical impedance spectroscopy (EIS) measurements, are carried out in 6 M KOH electrolyte. Specific capacitance of 456 F g(-1) for a single electrode could be achieved even after 500 cycles, suggesting its potential application in electrochemical capacitors. This promising method could provide a universal green chemistry approach to synthesize other low-cost and environmentally friendly transition metal hydroxide or oxide.
引用
收藏
页码:1871 / 1876
页数:6
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