材料科学
二硫化钼
阳极
异质结
无定形固体
离子
化学工程
扩散
无定形碳
纳米技术
石墨烯
钠
电极
光电子学
结晶学
化学
物理化学
复合材料
冶金
工程类
有机化学
物理
热力学
作者
Qichang Pan,Qiaobao Zhang,Fenghua Zheng,Yanzhen Liu,Youpeng Li,Xing Ou,Xunhui Xiong,Chenghao Yang,Meilin Liu
出处
期刊:ACS Nano
[American Chemical Society]
日期:2018-11-19
卷期号:12 (12): 12578-12586
被引量:268
标识
DOI:10.1021/acsnano.8b07172
摘要
Molybdenum disulfide (MoS2) has been considered to be a promising anode material for sodium ion batteries (SIBs), because of its high capacity and graphene-like layered structure. However, irreversible conversion reaction during the sodiation/desodiation process is a major problem that must be overcome before its practical applications. In this work, MoS2/amorphous carbon (C) microtubes (MTs) composed of heterostructured MoS2/C nanosheets have been developed via a simple template method. The existence of MoS2/C heterointerface plays a key role in achieving high and stable performance by stabilizing the reaction products Mo and sulfide phases, providing fast electronic and Na+ ions diffusion mobility, and alleviating the volume change. MoS2/C MTs exhibit a high reversible specific capacity of 563.5 mA h g–1 at 0.2 A g–1, good rate performance (520.5, 489.4, 452.9, 425.1, and 401.3 mA h g–1 at 0.5, 1.0, 2.0, 5.0, and 10.0 A g–1, respectively), and excellent cycling stability (484.9 mA h g–1 at 2.0 A g–1 after 1500 cycles).
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