【摘要】 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33.5mA/g电流密度下恒电流充放电的首次放电容量为777mAh/g,充电容量为759mAh/g,100次循环后的可逆容量仍保持在663mAh/g,具有良好的循环稳定性和电化学特性。更多还原

【Abstract】 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/Co₃O₄ 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.更多还原