表面活性剂对纳米ZnS电极材料电化学性能的影响  

Effect of surfactant on electrochemical properties of nano-sized ZnS electrode materials

作　　者：王安耸 陈秀娟[2] 周鹏程 张鹏林[1] WANG Ansong;CHEN Xiujuan;ZHOU Pengcheng;ZHANG Penglin(State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals,Lanzhou University of Tecnology,Lanzhou 730050,China;School of Mechanical and Electronical Engineering,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]兰州理工大学甘肃省有色金属省部共建国家重点实验室,兰州730050 [2]兰州理工大学机电工程学院,兰州730050

出　　处：《功能材料》2019年第6期6061-6065,6074,共6页Journal of Functional Materials

基　　金：甘肃省重点研发资助项目(17YF1GA020)

摘　　要：采用溶剂热法通过表面活性剂PVP改性所合成纳米ZnS电极材料.XRD、SEM、TEM测试结果表明,经表面活性剂PVP改性后的纳米ZnS结晶度明显提升,具有更完整的晶体结构;并且改性后产物晶粒尺寸更加均一,球形形貌更加完整,团聚现象明显改善.电化学性能测试结果表明,PVP改性后的纳米ZnS负极材料表现出更佳的循环稳定性,其首次可逆比容量可达到557.7mAh/g,循环50次后可逆比容量仍保持在420mAh/g,电化学性能明显高于改性前ZnS电极材料.Nano-sized ZnS electrode materials were synthesized by solvent thermal method through the modification of the surfactant of PVP.The results of XRD,SEM and TEM showed that the crystallinity of modified nano-sized ZnS were significantly improved and the crystal structure were more completed.The grain sizes of the modified product were more uniform,the spherical morphology was more completed,and the phenomenon of the agglomeration was significantly improved.The electrochemical performances of the modified ZnS products were evaluated as the anode materials for lithium ion batteries.PVP-modified ZnS exhibited improved cycling stability with the initial reversible capacity of 557.7 mAh/g.After 50 cycles,the reversible specific capacity remained 420 mAh/g,which was significantly higher than that of ZnS electrode materials before the modification.

关 键 词：溶剂热法 表面活性剂PVP 纳米ZNS 电极材料 电化学性能 

分 类 号：TM910[电气工程—电力电子与电力传动]