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采用水热法,将硝酸钴和尿素的混合溶液经160℃的水热反应制备前驱体,再经350℃煅烧,制得了Co3O4材料。通过X射线衍射分析(XRD)和扫描电子显微分析(SEM)对材料进行了微观组织和结构表征,结果表明该材料具有薄片状形貌,且薄片具有介孔结构,由纳米颗粒组装而成。将该片状介孔Co3O4材料用于锂离子电池负极,并进行了恒流充放电及循环伏安等电化学性能测试,得出该材料的首次放电和充电容量分别为1020mAh/g和730mAh/g,循环40周之后的充电容量为520mAh/g。
The hydrothermal method was used to prepare a precursor of a mixed solution of cobalt nitrate and urea by a hydrothermal reaction at 160 ° C and then calcined at 350 ° C to obtain a Co3O4 material. The microstructure and structure of the material were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results show that the material has a flaky morphology and the sheet has a mesoporous structure assembled from nano-particles . The sheet-shaped mesoporous Co3O4 material was used for the negative electrode of lithium-ion batteries, and the electrochemical performance tests such as constant current charge-discharge and cyclic voltammetry were carried out. The results showed that the first discharge and charge capacity of the material were 1020mAh / g and 730mAh / g, the charge capacity after 40 cycles is 520 mAh / g.