核壳结构TiC/Co_3O_4纳米线的制备及其电化学储锂性能  

Synthesis and Electrochemical Lithium Storage Properties of TiC/Co_3O_4 Core-shell Nanowire Architecture

作　　者：冯童[1] 杨雨晴[1] 黄辉[1] 陶新永[1] 张文魁[1] 

机构地区：[1]浙江工业大学材料科学与工程学院,浙江杭州310014

出　　处：《材料科学与工程学报》2016年第1期80-84,95,共6页Journal of Materials Science and Engineering

基　　金：国家自然科学资助项目(51172205;51002138);浙江省自然科学基金资助项目(LY13E020010)

摘　　要：以棉纤维为碳源和模板,采用生物模板法成功合成制备直径约100～150nm、长度几至十几微米的TiC纳米线,进而通过水热反应在其表面均匀沉积Co_3O_4纳米微粒,所构建的核壳结构TiC/Co_3O_4纳米线具有良好的循环稳定性和高倍率性能。在50mA/g电流密度下循环的第2次、第50次放电容量分别为824.3mAh/g和753.7mAh/g;在倍率性能测试中,当电流密度回到50mA/g时,可逆放电容量为1060.4mAh/g,高于起始的1048.2mAh/g。TiC nanowires were synthesized via a simple biotemplating method using natural nanoporous cotton fibers as both the carbon source and the template. The dimensions of as-sythesised TiC nanowires are in the range of 100-150nm in width and up to several micrometers in length. Then, the CosO4 nanoparticles were deposited uniformly on the surface of the TiC nanowires by hydrothermal method. As-constructed TiC/Cos04 nanostructure shows good electrochemical cycling stability and rating performance as anode materials for lithium ion batteries. In the 2nd and 50th discharge at 50mA/g, capacities of the TiC/CosO4 composites are 824.3 and 753.7mAh/g, respectively. For the rating test, when the current density returns to initial 50mA/g, the discharge capacity of the composites retains 1060.4mAh/g, exceeding 1048.2mAh/g at the 2nd cycle.

关 键 词：CO3O4 TiC纳米线 锂离子电池 负极材料 

分 类 号：TM911[电气工程—电力电子与电力传动]