Carbon‐Sheathed MoS2 Nanothorns Epitaxially Grown on CNTs: Electrochemical Application for Highly Stable and Ultrafast Lithium Storage. Issue 7 (28th November 2017)

• Record Type: Journal Article
• Authors: Zhang, Zijia; Zhao, Hailei; Teng, Yongqiang; Chang, Xiwang; Xia, Qing; Li, Zhaolin; Fang, Jiejun; Du, Zhihong; Świerczek, Konrad
• Is Part Of: Advanced energy materials. Volume 8:Issue 7(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-11-28
• Subjects: amorphous carbon layer -- carbon nanotubes -- epitaxial growth -- lithium‐ion batteries -- molybdenum disulfide; Energy harvesting -- Materials -- Periodicals; Energy conversion -- Materials -- Periodicals; Energy storage -- Materials -- Periodicals; Photovoltaics -- Periodicals; Fuel cells -- Periodicals; Thermoelectric materials -- Periodicals; 621.31
• DOI: 10.1002/aenm.201700174
• Languages: English
• ISSNs: 1614-6832

Abstract

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. Abstract : Carbon‐sheathed MoS2 nanothorns epitaxially grown on carbon nanotubes (CNTs) are prepared as a high‐stable and ultrafast lithium storage material. The epitaxial growth provides strong adhesion between MoS2 and CNTs via chemical CS bond, ensuring not only a high stability but also a high‐efficiency electron‐conduction/ion‐transportation system on cycling. The prepared electrode exhibits high specific capacity, superior rate capability, and excellent long‐cycling stability.