李亚杰, 侯贤华, 马少蒙, 黄媛, 汝强, 胡社军. 多边形结构富锂锰基正极材料的可控制备及性能[J]. 华南师范大学学报(自然科学版), 2017, 49(6): 34-38.
引用本文: 李亚杰, 侯贤华, 马少蒙, 黄媛, 汝强, 胡社军. 多边形结构富锂锰基正极材料的可控制备及性能[J]. 华南师范大学学报(自然科学版), 2017, 49(6): 34-38.
Polygon structure rich lithium manganese anode material of controllable preparation and performance study[J]. Journal of South China Normal University (Natural Science Edition), 2017, 49(6): 34-38.
Citation: Polygon structure rich lithium manganese anode material of controllable preparation and performance study[J]. Journal of South China Normal University (Natural Science Edition), 2017, 49(6): 34-38.

多边形结构富锂锰基正极材料的可控制备及性能

Polygon structure rich lithium manganese anode material of controllable preparation and performance study

  • 摘要: 本文通过水热合成法成功制备了一种富锂Li1.166(Mn0.6Ni0.2Co0.2)0.834O2正极材料。并通过X射线衍射(XRD)、扫描电子显微镜(SEM)和高精度电池测试系统分别对电极材料的结构、形貌和电化学性能进行了相应的表征和测试分析.结果表明,样品Li1.166(Mn0.6Ni0.2Co0.2)0.834O2具有较好的多面体结构特点以及优异的电化学性能,该电极材料相对于商用LiCoO2材料(约135mAh g?1)具有更高的充放电比容量,其值分别为363.8 mAh g?1 和 222.2 mAh g?1,首次库仑效率为61.1%.循环100周之后可逆放电比容量仍然可以达到235.5 mAh g?1.该富锂Li1.166(Mn0.6Ni0.2Co0.2)0.834O2正极材料在高能量密度动力电池发展中具有良好的应用前景和广阔的市场空间.

     

    Abstract: The Li-rich layered Li1.166(Mn0.6Ni0.2Co0.2)0.834O2 cathode materials have been successfully synthesized through hydrothermal method. The structure and morphology of the material were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) and the electrochemical performance were tested by battery test systerm, the results indicate that the sample Li1.166(Mn0.6Ni0.2Co0.2)0.834O2 shows the great feature on the surface of a polyhedron and excellent electrochemical performance. The first charge and discharge capacities of the sample is 363.8 and 222.2 mAh g?1, respectively, with an initial coulombic efficiency of 61.1 % at a constant density of 25 mA g?1 . A reversible discharge specific capacity of approximately 235.5 mAh g?1 is still obtained after 100 cycles. The discharge capacities of 225.6, 198.3, 162.5, 133.2 and 98.3 mAh g?1 can be obtained at 0.1C, 0.2C, 0.5C, 1C and 2C, respectively. The rich lithium Li1.166(Mn0.6Ni0.2Co0.2)0.834O2 cathode material in the development of high energy density of power battery has good application and broad market space.

     

/

返回文章
返回