原位碳包覆二硫化钼用于锂离子电池负极材料

以木耳为碳源，以钼酸钠、L-半胱氨酸分别为钼源和硫源，采用水热法原位合成一种碳包覆二硫化钼（MoS2@C）复合材料，用于锂离子电池负极材料。通过透射电子显微镜（TEM）和X射线衍射（XRD）对样品进行了系统的研究。以锂金属片为对电级，在两电极电池体系中进行电化学性能测试。结果表明:所制备的MoS2@C复合材料具有多孔碳包覆的结构和良好的电化学性能。MoS2@C展示出高的可逆容量（电流密度为0.1 A/g，容量为829.6 mAh/g），卓越的倍率特性（电流密度为2.0 A/g，容量为538.3 mAh/g）和良好的循环稳定性（电流密度为0.5 A/g时经过200次循环后，放电比容量保持率达94%）。所提出的策略还可进一步推广到其他过渡金属硫化物，用于超级电容器、钠离子电池和钾离子电池等储能领域。

In-Situ Carbon-Coated Molybdenum Disulfide as Anode Material for Lithium-Ion Batteries

Carbon-coated molybdenum disulfide (MoS2@C) composite materials were synthesized in-situ by a facile hydrothermal method with fungus as the carbon source, sodium molybdate and L-cysteine as the molybdenum source and sulfur source, respectively. The samples were systematically investigated by transmission electron microscopy (TEM) and X-ray diffraction (XRD). Electrochemical performances were evaluated in two-electrode cells versus metallic lithium. It is demonstrated that the obtained MoS2@C composite shows porous carbon-coated structure and excellent electrochemical performances as an anode electrode material for lithium-ion batteries. The MoS2@C exhibits high reversible capacity (829.6 mAh/g at 0.1 A/g), excellent rate capability (538.3 mAh/g at 2 A/g) and stable cycling performance (200 cycles with 94% capacity retention at 0.5 A/g). The strategy proposed in this work can be further extended to other transition metal sulfides for the applications in supercapacitors, sodium-ion batteries, potassium-ion batteries and so on.