Electrode

Lamellar Structure

Lamellar structure is an ideal electrode material for molybdenum disulfide. There is only a relatively weak van der Waals to combine the lamellar structure, which allows to have insertion reaction by foreign reactant, the host material expands along the C crystallographic direction, causing changes of the volume of material, and it is an ideal electrode material. At the same time, between the octahedral and tetrahedral layers of the structure may be inserted by a lithium ion, a lithium atom per unit, and then diffusion. In order to have a better transmission performance, composite material of single molecular layer and other lamellar structure is continuiung to bring forth the new through the old.

Manufacturing Process

Combine granular and shistose molybdenum disulfide, negative electrode material can be made, its specific capacity can be increased to more than 962mAh`g-1. After circulate for 100 times, it still can keep 912 mAh `g-1 specific capacity. This material has good cycling stability, which is suitable for making batteries.

MoS2 / GF composites with the embedded structure can be directly made through chemical vapor deposition (CVD) graphene on a substrate of graphene foam (GF) of four ammonium thiosulfate. The structure of SEM and TEM can be used for analyzing of the structure. MoS2 with particle size of 50nm is tightly embedded in the collector of three-dimensional porous graphene foam, which can be directly used as a lithium anode of lithium-ion battery. Raman spectroscopy confirmed that graphene prepared by CVD has a high quality, which can provide a good electronic conductive network for MoS2 / GF composites. Charge-discharge test results show that MoS2 / GF composite anode has a high lithium storage capacity, good circulation. And its initial capacity is 1,016mAh / g, after 50 cycles, the capacity still remains more than 800mAh / g. Excellent lithium storage performance of composite anode is mainly from two aspects: on the one hand, the three-dimensional pore structure of GF matrix can effectively increase the electrode reaction interface, ensuring high electrochemical utilization of MoS2, on the other hand, the embedding of GF effectively mitigate volume effect of MoS2, ensuring the stability of the electrochemically of active material.

Application

Therefore, lithium made by molybdenum disulfide havs a high storage space, it is widely used in electric vehicles, energy storage power station and other areas.