具有长循环稳定性的钾离子负极材料Sb_(2)Se_(3)@N-C的制备及其电化学性能  

Preparation and Electrochemical Performance of Sb_(2)Se_(3)@N-C with Long Cycle Stability Anode Material for Potassium-ion Batteries

作　　者：周浪 杨彬 胡学步[1] ZHOU Lang;YANG Bin;HU Xue-bu(Chongqing University of Technology, College of Chemistry and Chemical Engineering, Chongqing 400054, China)

机构地区：[1]重庆理工大学化学化工学院,重庆400054

出　　处：《合成化学》2022年第3期194-199,共6页Chinese Journal of Synthetic Chemistry

基　　金：重庆市教委科学技术研究计划项目(KJZD-K201801103);重庆市科技局技术创新与应用发展专项面上项目(cstc2019jscx-msxmX0358)。

摘　　要：与匮乏的锂资源相比,钾元素在自然界中储量丰富,使得钾离子电池被视为锂离子电池的替代品。Sb_(2)Se_(3)因较高的理论比容量(669 mAh/g)而被视为钾离子电池负极材料的候选材料。但Sb_(2)Se_(3)嵌钾会造成两倍以上的体积膨胀,和生成K_(2)Se导致容量快速衰减和导电性差。本文通过简单的水热反应、高温煅烧制得Sb_(2)Se_(3)@N-C,并将其作为钾离子电池负极材料进行电化学性能测试。结果表明:Sb_(2)Se_(3)@N-C表现良好的稳定性,在1.6 A/g的电流密度下循环1000次仍有180 mAh/g的容量。Compared with the lithium resources,potassium is abundant in nature,which makes potassium ion battery as a substitute for lithium-ion battery.Sb_(2)Se_(3) is considered as a candidate anode material for potassium ion batteries because of its high theoretical specific capacity(669 mAh/g).However,the intercalation of K+will cause more than twice the volume expansion and the formation of K_(2)Se,leads to rapid capacity attenuation and poor conductivity.In this paper,by simple hydrothermal reaction and high-temperature calcination,the product was obtained Sb_(2)Se_(3)@N-C.It was used as the anode material of potassium ion battery for electrochemical performance test,and showed very good stability.Sb_(2)Se_(3)@N-C still has 180 mAh/g capacity after 1000 cycles at the current density of 1.6 A/g.

关 键 词：Sb_(2)Se_(3) 氮掺杂碳 钾离子电池 负极材料 制备 电化学性能 水热反应 

分 类 号：O614.53[理学—无机化学]