FeS/SnS@rGO负极材料的制备及其电化学性能  

Preparation and Electrochemical Properties of FeS/SnS@rGO Anode Material

作　　者：盘书恵 卢秋影 欧盈君 黄蔚欣 李华锋 龚福忠[1] PAN Shuhui;LU Qiuying;OU Yingjun;HUANG Xinwei;LI Huafeng;GONG Fuzhong(College of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China;Guangxi Xinjing Science&Technology Co.,Ltd.,Nanning,530001,China)

机构地区：[1]广西大学化学化工学院,广西南宁530004 [2]广西新晶科技有限公司,广西南宁530001

出　　处：《化工技术与开发》2024年第10期14-18,22,共6页Technology & Development of Chemical Industry

摘　　要：过渡金属硫化物具有良好的储锂性能,比容量高,有望成为锂离子电池的负极材料;缺点则是导电能力差,充放电过程中容易发生结构坍塌或体积膨胀,导致比容量下降较快,循环充放电性能差。针对此缺陷,本文将氯化铁、氯化锡、硫代乙酸铵、还原氧化石墨烯(rGO)等组分在乙醇溶剂中充分混合后,采用溶剂热反应-高温热解法制备得到了氮掺杂、rGO包覆的复合材料FeS/SnS@N-rGO。在该材料中,FeS/SnS颗粒被片状rGO包裹形成三明治结构。作为锂离子电池的负极材料时,在0.1A·g^(-1)的电流密度下,首次充/放电比容量达到818.6/1430.0mAh·g^(-1),经过100次循环后,放电比容量为594.5mAh·g^(-1),在不同的倍率下充放电时,能保持较高的比容量和结构稳定性。Transition metal sulfides was expected to be the anode material for lithium-ion batteries due to their good lithium storage properties and high specific capacity,but suffer from poor conductivity,structure collapse,volume expansion,capacity decline and bad cyclic charge/discharge performance.To overcome these defects,N-doped RGo-coated composite FeS/SnS@N-rGO was prepared by solvent-thermal reaction combined with high temperature pyrolysis using ferric chloride,tin chloride,ammonium thioacetate and reduced graphene oxide(rGO)as raw materials.The as-prepared composite had a a sandwich structure,in which,the sheet rGO coated on FeS/SnS particle size.As an anode material for lithium-ion batteries,the FeS/SnS@N-rGO delivered an initial charge/discharge specific capacity of 818.6/1430.0 mAh/g at current density of 0.1A/g,and remained at 594.5 mAh/g after 100 cycles.When charge and discharge was performed at different rates,it could maintain a higher specific capacity and structural stability.

关 键 词：硫化铁 硫化锡 石墨烯 溶剂热合成 负极材料 比容量 

分 类 号：TM912[电气工程—电力电子与电力传动] TB333[一般工业技术—材料科学与工程]