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Hierarchical nanotubes assembled from MoS 2 -carbon monolayer sandwiched superstructure nanosheets for high-performance sodium ion batteries by Shi, Zheng-Tian; Kang, Wenpei; Xu, Jun; Sun, Yi-Wen; Jiang, Miao; Ng, Tsz-Wai; Xue, Hong-Tao; Yu, Denis Y.W.; Zhang, Wenjun; Lee, Chun-Sing is a Engineering article available to read on EtoBox.

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Interface engineering on 2D layered nanomaterials plays pivotal roles in achieving novel properties and superior device performance. In this work, hierarchical nanotubes consisting of 2D monolayer MoS2 and carbon (MoS2:C) interoverlapped superstructure nanosheets have been synthesized, in which the MoS2 and carbon layers are alternately sandwiched. The hierarchical architectures assembled from the MoS2:C superstructures are beneficial for: (i) providing substantially expanded (002) interlayer spacing (0.98nm) of 2H-MoS2 which facilitates fast Na+ insertion/extraction reaction kinetics, (ii) improving electrical conductivity of MoS2 by carbon monolayer insertion with ideal heterointerface contact, (iii) preventing aggregation of MoS2 nanosheets, and (iv) accommodating volume change upon sodiation/desodiation. The superstructure nanotubes are demonstrated as a robust anode material for sodium storage with superior electrochemical performance. They deliver a high rate-capability and maintain discharge capacities of 295 and 187mAhg−1 at high current densities of 10.0 and 20.0Ag−1, respectively. Furthermore, they show durable cycling life (capacity retention of 101.3%, 108.2% and 107.8%

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Author

Shi, Zheng-Tian; Kang, Wenpei; Xu, Jun; Sun, Yi-Wen; Jiang, Miao; Ng, Tsz-Wai; Xue, Hong-Tao; Yu, Denis Y.W.; Zhang, Wenjun; Lee, Chun-Sing

Publisher

Elsevier ; Elsevier BV (ISSN 2211-2855)

Published

2016

Language

EN

Field

Engineering (Physical Sciences)