Co@CNTs的制备及性能表征

Preparation and Properties Characterization of Cobalt and Carbon Nanotubes Composite

采用球磨处理增加碳纳米管的结构缺陷,提高其反应活性,并以简单水热法合成了Co@CNTs复合物.用XRD、SEM、TEM对其结构和形貌进行了表征.结果显示,球磨处理后CNTs长度变短,复合物中CNTs与Co分布均匀,Co为纳米颗粒且有部分生长在CNTs表面.电化学性能测试结果表明,Co@CNTs电极比Co电极具有更高的放电容量、更好的循环稳定性及抗腐蚀性能.

Cobalt and carbon nanotubes composite（Co@CNTs） was synthesized through a facile hydrothermal route.The CNTs was pretreated by ball milling to increase structural defects and improve reactivitiy.XRD,SEM and TEM characterizations reveal that CNTs are destroyed to form short tubes.Co and CNTs are evenly distributed and some of the Co nanoparticals grow on the surface of CNTs.A series of electrochemical measurements show that,compared with the pure Co electrodes,the Co@CNTs electrodes possess higher discharge capacity, better cycle performance and anticorrosion behavior.