Citation: GU Ze-Yu, GAO Song, HUANG Hao, JIN Xiao-Zhe, WU Ai-Min, CAO Guo-Zhong. Electrochemical Behavior of MWCNT-Constraint SnS₂ Nanostructure as the Anode for Lithium-Ion Batteries[J]. Acta Physico-Chimica Sinica, ;2017, 33(6): 1197-1204. doi: 10.3866/PKU.WHXB201703293 shu

Electrochemical Behavior of MWCNT-Constraint SnS₂ Nanostructure as the Anode for Lithium-Ion Batteries

GU Ze-Yu ^1, ,
GAO Song ¹ ,
HUANG Hao ¹ ,
JIN Xiao-Zhe ¹ ,
WU Ai-Min ¹ ,
CAO Guo-Zhong ^1,2

1.
Key Laboratory of Materials Modification by Laser, Ion and Electron Beams(Ministry of Education), School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, Liaoning Province, P. R. China;
2.
Department of Materials Science and Engineering, University of Washington, Seattle, WA 98195, USA

Received Date: 4 January 2017
Revised Date: 13 March 2017

Fund Project: The project was supported by the National Natural Science Foundation of China (51171033), Science and Technology Supported Plan (Industry Field) of Changzhou, China (CE20160022), Project of Innovative Talents Introduction and Training of Changzhou, China (CQ20153002) and Fundamental Research Funds for the Central Universities, China (DUT16LAB03, DUT15LAB05).

Multi-walled carbon nanotube constrained SnS₂ (SnS₂@MWCNT) nanostructure is successfully realized through a facile 2-step process. Firstly, DC arc-discharge method is applied to fabricate Sn@MWCNT nanoparticles as the precursor that is subsequently converted into SnS₂@MWCNT through low-temperature vulcanization. Various analytical methods, including powder X-ray diffraction (XRD), transmission electron microscopy (TEM), and Raman spectroscopy, are used to ascertain the microstructure and morphology of the SnS₂@MWCNT nanoparticles. The results show that the SnS₂@MWCNT nanoparticles have a uniform structure of SnS₂ half-filled MWCNTs with average thickness of 10 nm and average length of ~400 nm. The electrochemical properties of the as-prepared SnS₂@MWCNT nanoparticles are studied using the nanoparticles as anode materials in Li-ion batteries. The SnS₂@MWCNT electrode presents high initial Coulombic efficiency of 71% and maintains a capacity of 703 mAh·g^-1 after 50 cycles. Excellent performance of the batteries benefits from the active electrochemical reactions of various chemical components, multi-step lithiation/delithiation behaviors, and the structural constraint from the MWCNTs.
- Lithium-ion battery,
- Multi-walled carbon Nanotube,
- Tin disulfide,
- Anode,
- Nanomaterial
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Electrochemical Behavior of MWCNT-Constraint SnS₂ Nanostructure as the Anode for Lithium-Ion Batteries