Bi_(2)S_(3)/SnS@PDA负极材料的制备及储钠性能  

Preparation of Bi_(2)S_(3)/Sn@PDA Anode Material and Sodium Storage Properties

作　　者：董洋涛 马全贵 李文文 张苏源 蔡玉荣[1] DONG Yangtao;MA Quangui;LI Wenwen;ZHANG Suyuan;CAI Yurong(School of Materials Science and Engineering,Zhejiang Sci-Tech University,Hangzhou 310018,China)

机构地区：[1]浙江理工大学材料科学与工程学院,浙江杭州310018

出　　处：《广州化学》2024年第5期37-43,共7页Guangzhou Chemistry

基　　金：浙江省重点研发计划双边产业联合研发计划项目(2023C04045)。

摘　　要：为解决硫化铋作为钠离子电池的负极材料在应用过程中体积膨胀应力大、导电性差等问题,以Bi/ZIF-8MOF材料作为前驱体,经过碳化、锡离子吸附、硫化和PDA包覆过程制备得到Bi_(2)S_(3)/SnS@PDA复合材料。采用SEM、XRD、XPS对样品的形貌及结构进行表征,通过电池充放电测试仪和电化学工作站测试了样品的电化学性能,并探讨了锡离子添加量对材料电化学性能的影响。结果表明:当Bi/ZIF-8与SnCl_(2)质量比为1∶1时,所制得的样品具有最佳的储钠性能。该样品在0.2 A/g下循环100次后,比容量高达862.3 mAh/g;在1 A/g下循环500次后,其比容量仍可保持723.9 mAh/g。样品良好的电化学性能归因于材料优化的化学成份和合理的结构设计。本研究为高性能钠电负极材料的设计提供了新策略,所制得BiSn双金属硫化物复合材料在储钠领域具有潜在的应用前景。To solve the problems of high-volume expansion stress and poor conductivity in the application of bismuth sulfide anode materials for sodium ion batteries,Bi/ZIF-8 MOF materials were used as precursors to prepare Bi_(2)S_(3)/SnS@PDA composite through carbonization,tin ion adsorption,vulcanization,and PDA coating processes.The morphology and structure of the sample were characterized by SEM,XRD,and XPS.The electrochemical performance of the sample was tested using a battery charge discharge tester and an electrochemical workstation.The influence of element ratio of Bi/Sn on the electrochemical performance of the material was explored.The results indicate that the obtained sample has the best sodium storage performance when the Bi/Sn ratio is 1:1.After 100 cycles at 0.2 A/g,the specific capacity of the sample reaches 862.3 mAh/g.After 500 cycles at 1 A/g,its specific capacity can still maintain 723.9 mAh/g.The excellent electrochemical performance of the sample is attributed to its optimized chemical composition and reasonable structural design.This study provides a new strategy for the design of high-performance anode materials,and the resulting BiSn Bimetallic sulfide composite has potential application prospects in the field of sodium storage.

关 键 词：钠离子电池 负极 金属有机框架 硫化铋 硫化锡 

分 类 号：O61[理学—无机化学]