插层(化学)
二硫化钼
阴极
材料科学
水溶液
化学工程
离子
碳纳米管
电化学
电极
纳米技术
无机化学
复合材料
化学
物理化学
有机化学
工程类
作者
Meihong Huang,Y.J. Mai,Lijun Zhao,Xinghua Liang,Zhijie Fang,Xiaohua Jie
标识
DOI:10.1002/celc.202001036
摘要
Abstract As a cathode material of aqueous rechargeable zinc‐ion batteries (ARZIBs), molybdenum disulfide (MoS 2 ) still suffers sluggish intercalation kinetics, poor electronic conductivity and insufficient active surface. Here, a hierarchical hybrid composing of ultrathin MoS 2 nanosheets with expanded interlayer spacing that grow directly on the surface of carbon nanotubes (MoS 2 @CNTs) is firstly proposed as the cathode material of ARZIBs. Its zinc storage performance and corresponding enhanced mechanism are investigated via electrochemical characterizations and density functional theory calculations. The results reveal that the enlarged spacing of MoS 2 interlayer decreases the energy barrier of Zn 2+ intercalation and the CNTs backbone improves the electron transfer. What's more, the hierarchical structure provides a great number of active sites for electrochemical reactions. As a result, the hierarchical MoS 2 @CNTs hybrid delivers a high reversible capacity with good cycling stability and rate capability.
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