文摘
The spinel-type Co3O4 with a dendritic nanostructure is prepared via homogeneous co-precipitation method in the presence of oxalic as complex agent. The special structure was characterized by X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, and thermogravimetric analysis, which show that the precursor can be transformed into dendritic crystal Co3O4 by calcining at 500?°C for 2?h with a diameter of 20-0?nm. Such a three-dimensional interconnected structure used as an anode material for lithium-ion batteries shows that the discharge specific capacity still remains at 951.7?mA?h?g? after 100 cycles at a current density of 100?mA?g?. Furthermore, this material also presents a good rate performance; when the current density increases to 1,000, 4,000, and 8,000?mA?g?, the reversible capacity can render about 1,126.2, 932.3, and 344.2?mA?h?g?, respectively. The excellent electrochemical performance is mainly attributed to the dendritic nanostructure composed of interconnected Co3O4 nanoparticles.