摘要
鉴于氮掺杂碳电化学储钠比容量低问题,采用钼酸铵浸泡聚苯胺纳米棒进行气相硫化的方法合成了二硫化钼@氮掺杂碳复合材料(MoS_(2)@NC)。在电极材料中,MoS_(2)以镶嵌于氮掺杂碳中的单层结构和生长在碳纳米棒表面的纳米片两种形式存在。与氮掺杂碳纳米棒相比,MoS_(2)/NC电极材料显示出优越的钠离子存储性能,如高比容量(电流密度为0.1 A·g^(-1)时,比容量为586.0 mAh·g^(-1))、高倍率性能(电流密度为2 A·g^(-1)时比,容量达到403.8 mAh·g^(-1))和优良的循环稳定性能(290次循环后容量为434.1 mAh·g^(-1))。这种合成方法实现了在分子水平上设计MoS_(2)/NC材料。
In view of the low specific capacity of nitrogen-doped carbon for electrochemical sodium storage,MoS_(2)@nitrogen-doped carbon composite(MoS_(2)@NC)was synthesized by vapor-phase vulcanization of polyaniline nanorods soaked with ammonium molybdate.In the electrode materials,MoS_(2) exists in two forms:Monolayer structure embedded in nitrogendoped carbon and nanosheet growing on the surface of carbon nanorods.Compared with nitrogen-doped carbon nanorods,MoS_(2)/nitrogen-doped carbon electrode materials show superior sodium ion storage properties,such as high specific capacity(When the current density is 1 A·g^(-1),specific capacity is 586.0 mAh·g^(-1)),high rate(specific capacity is 403.8 mAh·g^(-1)when the current density is 2 A·g^(-1))and excellent cycle stability(capacity is 434.1 mAh·g^(-1)after 290 cycles).This synthesis method realizes the design of MoS_(2)/carbon hybrid materials at the molecular level,and has a good application prospect in the design of high-performance hybrid electrode materials for sodium ion batteries.
作者
高裕跃
李子杰
毛常明
GAO Yuyue;LI Zijie;MAO Changming(College of Materials Science and Engineering,Qingdao University of Science and Technology,Qingdao 266042,China)
出处
《青岛科技大学学报（自然科学版）》
CAS
2024年第6期32-39,共8页
Journal of Qingdao University of Science and Technology:Natural Science Edition
基金
山东省自然科学基金项目(ZR2019MB01737)。
关键词
二硫化钼
氮掺杂碳
钠离子电池
负极材料
Mo_(2)
nitrogen doped carbon
sodium ion batteries
anode materials
