一种简单溶剂热法合成海胆状硫化铋用于钾离子电池负极材料

A simple solvothermal synthesis of sea urchin-like bismuth sulfide for potassium anode

摘要:

采用简单的溶剂热法合成出一种海胆状的硫化铋材料，用于钾离子电池负极．实验结果表明：该种材料可有效的提高钾电负极材料的循环性能，在电流密度50 mA/g下，容量可以达到279 mA·h/g，经过500圈循环后比容量还能保持84.6%；海胆状的硫化铋由于球体本身都是刺状结构，很大的抑制了钾化/去钾化过程中体积膨胀，其较大的空隙空间和较短的扩散距离也能很好的提高电解液接触面积．海胆状的硫化铋材料为钾离子电池负极提供了一种潜在的负极材料，是一种很有前途的材料．

Abstract:

A Sea urchin-like Bi2S3 material was synthesized by a simple solvothermal method for potassium ion battery anode. The results show that this material can effectively improve the cycling performance of the potassium anode. At a current density of 50 mA/g, the capacity can reach 279 mAh/g, and the specific capacity can still be maintained at 84.6% after 500 cycles. The bismuth sulfide sphere itself has a thorn-like structure, which greatly inhibits the volume expansion in the process of potassiumization/depotassization. The shorter diffusion distance can also improve the contact area of electrolyte. The sea urchin-like Bi2S3 provides a potential anode material for potassium ion battery anode, which is a very promising material.