Inter-overlapped MoS2/C composites with large-interlayer-spacing for high-performance sodium-ion batteries
In: Nanoscale Horizons, Jg. 5 (2020), S. 1127-1135
Online
unknown
Zugriff:
As a two-dimensional layered material with a structure analogous to that of graphene, molybdenum disulfide (MoS2) holds great promise in sodium-ion batteries (SIBs). However, recent research findings have revealed some disadvantages in two-dimensional (2D) materials such as poor interlayer conductivity and structural instability, resulting in poor rate performance and short cycle life for SIBs. Herein, we designed MoS2 nanoflowers with an ultra-wide spacing interlayer (W-MoS2/C) anchored on special double carbon tubes to construct three-dimensional (3D) nanostructures. When tested as an anode material in a SIB, the as-prepared CNT@NCT@W-MoS2/C sample achieves high capacities (530 and 230 mA h g−1 at current densities of 0.1 and 2 A g−1, respectively). Density functional theory (DFT) calculations demonstrate that the ultra-wide spacing MoS2/C structure is beneficial for the chemical adsorption of sodium ions and facilitates redox reactions. The wide interlayer spacing and the presence of an intermediate carbon layer provide a rapid diffusion channel for ions and offer a free space for volume expansion of the electrode material.
Titel: |
Inter-overlapped MoS2/C composites with large-interlayer-spacing for high-performance sodium-ion batteries
|
---|---|
Autor/in / Beteiligte Person: | Luo, Xiaoke ; Wang, Yinghui ; Wang, Yangbo ; Zhang, Deyang ; Liu, Xianming ; Jang Kyo Kim ; Luo, Yongsong ; Yang, Ya |
Link: | |
Zeitschrift: | Nanoscale Horizons, Jg. 5 (2020), S. 1127-1135 |
Veröffentlichung: | Royal Society of Chemistry (RSC), 2020 |
Medientyp: | unknown |
ISSN: | 2055-6764 (print) ; 2055-6756 (print) |
DOI: | 10.1039/d0nh00152j |
Schlagwort: |
|
Sonstiges: |
|