以TiO2粉末和NaOH为原料,在机械外力场作用下,采用水热法制备TiO2纳米线.随后将得到的TiO2纳米线与六水合硝酸钴(Co(NO3)2·6H2O)和尿素(Urea)共同水热反应制备TiO2/Co3O4纳米结构材料.分别利用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、电池充放电测试仪和电化学工作站等,对材料的相组成、微观形貌、锂电性能和阻抗性能进行测试.结果表明,TiO2/Co3O4纳米复合材料为鸟巢状结构,其在33.5 mA/g电流密度下恒电流充放电的首次放电容量为777 mAh/g,充电容量为759 m Ah/g,100次循环后的可逆容量仍保持在663 m A h/g,具有良好的循环稳定性和电化学特性.%In this work ,a TiO2/Co3O4 nanostructured materials was prepared through a hydrothermal process using cobalt (Ⅱ) nitrate hexahydrate ,urea ,and hydrothermally pre-synthesized (from TiO2 powders and NaOH and under mechanical stirring ) TiO2 nanowires as raw materials .The composition ,morphology and electrochemical performance of the product were characterized by employing X-ray diffractometer (XRD) ,scanning electron microscope (SEM ) ,charging/discharging tester and electrochemical workstation .Our experiments illustrated the nest-like micromorphology ,good cyclic stability and electrochemical character of this two-step hydrothermally synthesized TiO2/Co3 O4 composites ,as the electrode exhibited initial discharge and charge capacities of 777 mAh/g and 759 mAh/g ,respectively ,and a capacity retention of 663 mAh/g after 100 cycles during constant-current charge/discharge at 33 .5 mA/g .
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