MoO_3纳米带/RGO复合材料的制备及其电化学性能研究

MoO_3 Nanobelts/Reduced Graphene Oxide(RGO) Composites as a High-Performance Anode Material for Lithium Ion Batteries

以水杨酸为模板剂和还原剂,采用水热法制备得到了一种MoO3纳米带/RGO复合材料。利用XRD、SEM、TEM、拉曼光谱、恒流充放电、交流阻抗等手段对样品的结构、形貌以及电化学性能进行表征。测试结果表明,MoO3纳米带/RGO复合材料作为锂离子电池负极材料,在50 m A·g-1的电流密度下可逆比容量为1 000 m Ah·g-1,循环50次后比容量还保持在950 m Ah·g-1,相比于MoO3纳米带其容量保持能力和循环性能得到了显著改善。

MoO3nanobelts/RGO composites were obtained through a facile and efficient hydrothermal procedure by using organic compound sodium salicylate as both structure-directing agent and reducing agent. The crystal structure, morphologies and electrochemical performances of the as-prepared samples were characterized by powder X-ray diffraction（XRD）, scanning electron microscopy（SEM）, transmission electron microscopy（TEM）,Raman spectroscopy, galvanostatic charge/discharge test and electrochemical impedance spectroscopy（EIS）. The hybrid material shows a high specific capacity of 1 000 m Ah·g-1with a good cycling stability as an anode material for lithium ion batteries, which has a much enhanced performance compared to bare MoO3 nanobelts.