近日,实验室王溦老师关于在高孔隙率碳纤维中原位嵌入ZnS纳米晶作为先进负极材料,用于高效储锂的论文发表在Acta Metallurgica Sinica (English Letters).
ZnS is a promising material for lithium-ion battery anodes due to its abundant natural resources, simplicity of synthesis, and high theoretical lithium storage capacity. However, it needs to be optimized for its low conductivity and volume effect during the charge–discharge process. The traditional method of combining with carbonaceous materials is usually laborious, and the required sulfuration process may possibly result in the destruction of materials morphology. In this study, hybrid materials formed by the combination of ZnS nanocrystals and high porosity carbon fibers were synthesized by one-step electrospinning using zinc diethyldithiocarbamate and polyacrylonitrile as raw materials and poly (ethylene glycol)—block-poly (propylene glycol)—block-poly (ethylene glycol) as template. The method is simple and avoids the influence of sulfuration process on the morphology of materials. The composite presents a specific capacity of 592.2 mAh g−1 under a current density of 1 A g−1 after 1000 cycles. The porous structure significantly decreases the diffusion mean-free path of Li and inhibits the volume effect associated with the lithium storage process of ZnS. In addition, the 3D cross-linked carbon fibers improve the conductivity of materials. This study can serve as an inspiration for the development of other lithium storage composites.
论文题目:In Situ Embedment of ZnS Nanocrystals in High Porosity Carbon Fibers as an Advanced Anode Material for Efficient Lithium Storage
论文作者:Wei Wang,Mingyu Guan,Qinghua Wang,Yangyang Chen,Liang Chen,Hong Yin,Yucan Zhu,Gangyong Li,Zhaohui Hou.