Encapsulation of selenium sulfide in double-layered hollow carbon spheres as advanced electrode material for lithium storage

Zhang, Hongwei, Zhou, Liang, Huang, Xiaodan, Song, Hao and Yu, Chengzhong (2016) Encapsulation of selenium sulfide in double-layered hollow carbon spheres as advanced electrode material for lithium storage. Nano Research, 9 12: 3725-3734. doi:10.1007/s12274-016-1243-2


Author Zhang, Hongwei
Zhou, Liang
Huang, Xiaodan
Song, Hao
Yu, Chengzhong
Title Encapsulation of selenium sulfide in double-layered hollow carbon spheres as advanced electrode material for lithium storage
Journal name Nano Research   Check publisher's open access policy
ISSN 1998-0000
1998-0124
Publication date 2016-12-01
Year available 2016
Sub-type Article (original research)
DOI 10.1007/s12274-016-1243-2
Open Access Status Not yet assessed
Volume 9
Issue 12
Start page 3725
End page 3734
Total pages 10
Place of publication Beijing, China
Publisher Tsinghua University Press
Collection year 2017
Language eng
Formatted abstract
Selenium sulfide/double-layered hollow carbon sphere (SeS2/DLHC) composites have been designed as high-performance cathode materials for novel Li–SeS2 batteries. In the constructed composite, SeS2 is predominantly encapsulated in the interlayer space of DLHCs with a high loading of 75% (weight percentage) and serves as the active component for lithium storage. The presence of Se in the composite and the carbon framework not only alleviate the shuttling of polysulfide, but also improve the conductivity of electrodes. Migration of active materials from the interlayer void to the hollow cavity of DLHCs after cycling, which further mitigates the loss of active materials and the shuttle effect, is observed. As a result, the SeS2/DLHC composite delivers a high specific capacity (930 mA·h·g−1 at 0.2 C) and outstanding rate capability (400 mA·h·g−1 at 6 C), which is much better than those of SeS2/single-layered hollow carbon sphere, Se/DLHC, and S/DLHC composites. Notably, the SeS2/DLHC composite shows an ultralong cycle life with 89% capacity retention over 900 cycles at 1 C, or only 0.012% capacity decay per cycle. Our study reveals that both SeS2 and the double-layered structures are responsible for the excellent electrochemical performance.
Keyword Cathode materials
Double-layered hollow carbon
Lithium storage
Selenium sulfide
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
Australian Institute for Bioengineering and Nanotechnology Publications
 
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