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Efficient Na‐Ion Storage in 2D TiS 2 Formed by a Vapor Phase Anion‐Exchange Process
Author(s) -
Zhuo Sifei,
Huang Gang,
Lei Yongjiu,
Wang Wenxi,
Liu Zhixiong,
Xu Xiangming,
Yin Jian,
Alshareef Husam N
Publication year - 2020
Publication title -
small methods
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.66
H-Index - 46
ISSN - 2366-9608
DOI - 10.1002/smtd.202000439
Subject(s) - materials science , polysulfide , anode , nanotechnology , carbon fibers , chemical engineering , porosity , dissolution , electrode , composite material , chemistry , composite number , engineering , electrolyte
Hierarchical nanocomposites that couple downsized 2D materials with carbonaceous functional supports are promising electrode materials for metal ion batteries. Herein, a honeycomb‐like Na‐ion battery (NIB) anode material, which comprises 2D downsized TiS 2 nanocrystals uniformly dispersed in a 3D porous carbon honeycomb, is developed by a vapor phase anion‐exchange reaction of CS 2 with a dual‐template of TiO 2 sealing in hydrogen‐substituted graphdiyne (HsGDY). On the one hand, the 2D downsized TiS 2 nanolayers offer much more accessible active sites for both Na + storage and polysulfide trapping; on the other hand, the 3D porous hollow carbon nanoscale honeycomb not only provides numerous space‐confined nanorooms to reduce the stacking of the tiny 2D TiS 2 nanolayers and suppress the dissolution of polysulfide, but also works as built‐in 3D conductive networks to support the electron/ion transfer and buffer the volume expansion during cycling. In light of this, such a hybrid 3D TiS 2 @carbon honeycomb achieves a high reversible capacity with high‐rate and long‐life performance for NIBs.