MoS2@氮掺杂碳复合结构电极材料制备及其钠离子存储性能
MoS2@nitrogen Doped Carbon Composite Structure Electrode Material Preparation and Sodium Ion Storage Performance
高裕跃 1李子杰 1毛常明1
作者信息
- 1. 青岛科技大学材料科学与工程学院,山东青岛 266042
- 折叠
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(MoS2@NC).在电极材料中,MoS2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,MoS2/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MoS2/NC材料.
Abstract
In view of the low specific capacity of nitrogen-doped carbon for electrochemical sodium storage,MoS2@nitrogen-doped carbon composite(MoS2@NC)was synthesized by vapor-phase vulcanization of polyaniline nanorods soaked with ammonium molybdate.In the electrode materials,MoS2 exists in two forms:Monolayer structure embedded in nitrogen-doped carbon and nanosheet growing on the surface of carbon nanorods.Compared with ni-trogen-doped carbon nanorods,MoS2/nitrogen-doped carbon electrode materials show superi-or 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 MoS2/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.
关键词
二硫化钼/氮掺杂碳/钠离子电池/负极材料Key words
MoS2/nitrogen doped carbon/sodium ion batteries/anode materials引用本文复制引用
出版年
2024
NETL
NSTL
万方数据