| 二次水热法制备鸟巢状TiO2/Co3O4纳米结构及其锂电性能 |
| |
| 引用本文： | 张冠群,许州,刘建雄,杨艳蓉,刘成,程琪,于晓华. 二次水热法制备鸟巢状TiO2/Co3O4纳米结构及其锂电性能[J]. 材料导报, 2017, 31(22): 5-9. DOI: 10.11896/j.issn.1005-023X.2017.022.002 |
| |
| 作者姓名： | 张冠群 许州 刘建雄 杨艳蓉 刘成 程琪 于晓华 |
| |
| 作者单位： | 1. 昆明理工大学材料科学与工程学院 ,昆明,650093;2. 昆明理工大学材料科学与工程学院 ,昆明650093;华南理工大学材料科学与工程学院 ,广州 510640;3. 昆明理工大学固体废弃物资源化国家工程研究中心 ,昆明,650093 |
| |
| 基金项目： | 国家自然科学基金(51601081;51665022)；省级人培项目(KKSY201628022)；省教育厅项目(2016ZZX031) |
| |
| 摘 要： | 以TiO_2粉末和NaOH为原料,在机械外力场作用下,采用水热法制备TiO_2纳米线。随后将得到的TiO_2纳米线与六水合硝酸钴(Co(NO_3)_2·6H_2O)和尿素(Urea)共同水热反应制备TiO_2/Co_3O_4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,TiO_2/Co_3O_4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。
|
| 关 键 词： | 锂离子电池 电化学性能 循环稳定性 鸟巢状 TiO2纳米线 TiO2/Co3O4复合材料 二次水热法 |
Two-step Hydrothermally Synthesized Nest-like TiO2/Co3O4 Nanostructures with Good Electrochemical Performance for Lithium Ion Battery |
| |
| ZHANG Guanqun,XU Zhou,LIU Jianxiong,YANG Yanrong,LIU Cheng,CHENG Qi and YU Xiaohua. Two-step Hydrothermally Synthesized Nest-like TiO2/Co3O4 Nanostructures with Good Electrochemical Performance for Lithium Ion Battery[J]. Materials Review, 2017, 31(22): 5-9. DOI: 10.11896/j.issn.1005-023X.2017.022.002 |
| |
| Authors: | ZHANG Guanqun XU Zhou LIU Jianxiong YANG Yanrong LIU Cheng CHENG Qi YU Xiaohua |
| |
| Affiliation: | Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093,Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093;School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640,Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093,Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093,Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093,Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093 and National Engineering Research Center of Waste Resource Recovery, Kunming University of Science and Technology, Kunming 650093 |
| |
| 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/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 . |
| |
| Keywords: | lithium ion battery electrochemical performance cyclic stability nest-like TiO2 nanowire TiO2/Co3O4 composite two step hydrothermal synthesis |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《材料导报》浏览原始摘要信息 |
|
点击此处可从《材料导报》下载全文 |
|
