Carbon‐Sheathed MoS2 Nanothorns Epitaxially Grown on CNTs: Electrochemical Application for Highly Stable and Ultrafast Lithium Storage |
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Authors: | Zijia Zhang Hailei Zhao Yongqiang Teng Xiwang Chang Qing Xia Zhaolin Li Jiejun Fang Zhihong Du Konrad ?wierczek |
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Institution: | 1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, China;2. Beijing Municipal Key Laboratory of New Energy Materials and Technologies, Beijing, China;3. Faculty of Energy and Fuels, Department of Hydrogen Energy, AGH University of Science and Technology, Krakow, Poland;4. AGH Centre of Energy, AGH University of Science and Technology, Krakow, Poland |
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Abstract: | Molybdenum disulfide (MoS2), which possesses a layered structure and exhibits a high theoretical capacity, is currently under intensive research as an anode candidate for next generation of Li‐ion batteries. However, unmodified MoS2 suffers from a poor cycling stability and an inferior rate capability upon charge/discharge processes. Herein, a unique nanocomposite comprising MoS2 nanothorns epitaxially grown on the backbone of carbon nanotubes (CNTs) and coated by a layer of amorphous carbon is synthesized via a simple method. The epitaxial growth of MoS2 on CNTs results in a strong chemical coupling between active nanothorns and carbon substrate via C? S bond, providing a high stability as well as a high‐efficiency electron‐conduction/ion‐transportation system on cycling. The outer carbon layer can well‐accommodate the structural strain in the electrode upon lithium‐ion insertion/extraction. When employed as an anode for lithium storage, the prepared material exhibits remarkable electrochemical properties with a high specific capacity of 982 mA h g?1 at 0.1 A g?1, as well as excellent long‐cycling stability (905 mA h g?1 at 1 A g?1 after 500 cycles) and superior rate capability, confirming its potential application in high‐performance Li‐ion batteries. |
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Keywords: | amorphous carbon layer carbon nanotubes epitaxial growth lithium‐ion batteries molybdenum disulfide |
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