MoS2／石墨烯纳米复合材料的制备及其锂电性能研究  

Facile Synthesis of MoS_2/graphene Nanocomposites as Anode Material for Lithium Ion Battery

作　　者：丁军[1] 

机构地区：[1]哈尔滨理工大学材料科学与工程学院,黑龙江哈尔滨150040

出　　处：《哈尔滨理工大学学报》2013年第3期110-113,共4页Journal of Harbin University of Science and Technology

基　　金：哈尔滨市学科后备带头人基金(2003147;2003AFXXJ011)

摘　　要：采用一种简单的水热法制备MoS2/石墨烯纳米复合材料,通过XRD,SEM,TEM,XPS等对合成的复合材料的结构和形貌进行表征,在充放电电压为0.001～3 V,恒电流密度为100 mA/g条件下对MoS2和MoS2/石墨烯复合材料的电化学性能进行测试和分析.通过对比发现,MoS2/石墨烯复合材料首次充放电容量分别677.6 mAh/g和835 mAh/g,库伦效率为81%,40次循环后其放电容量仍维持在753 mAh/g,较单纯的MoS2具有更高的可逆容量和更好的循环稳定性.对MoS2/石墨烯复合材料在不同电流密度下的充放电测试发现,即使在大电流条件下充放电,电极仍能保持稳定的循环行为,表明MoS2/石墨烯复合材料具有良好的倍率性能.Three-dimensional （3D） hierarchical MoSJgraphene composites have been synthesized with a simple in situ hydrothermal method. The structures were characterized by XRD, SEM, TEM and XPS respectively. In addition, the electrochemical performance of MoS2 and MoSJgraphene were evaluated in the voltage range of 0. 001 -3 V, at a current density of 100 mA/g respectively. The MoS2/graphene nanoeomposite electrode showed an ini- tial charge and discharge capacity of 677.6 and 835 mAh/g in the first cycle, with the eoulombic efficiency of 81%. The composites exhibits a stable capacity of about 753 mAh/g with no noticeable fading for up to 40 cycles, which has shown superior performance compared to MoS2 nanoparticles. In addition, the multi-current density discharge cycling performance of the MoS2/graphene was also tested. All the results indicated that the MoS2/graphene composites have shown enhanced electrochemical performance towards the high reversible capacity, good rate capa- bility and cycle performance.

关 键 词：水热法 MOS2 石墨烯 锂离子电池 阳极材料 

分 类 号：N39[自然科学总论]