Few-layer SnS2/graphene hybrid with exceptional electrochemical performance as lithium-ion battery anode

Here we develop a facile process for preparing few-layer SnS2/graphene (FL-SnS2/G) hybrid by solution-phase method employing l-cysteine as a complexing, sulfide source and reducing agent. The FL-SnS2/G hybrid is characterized by XRD, SEM and HRTEM. It is demonstrated that the few-layer SnS2 with def...

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Bibliographic Details
Published in:Journal of power sources 2012-03, Vol.201, p.259-266
Main Authors: Chang, Kun, Wang, Zhen, Huang, Guochuang, Li, He, Chen, Weixiang, Lee, Jim Yang
Format: Article
Language:English
Subjects:
Anodes
Applied sciences
Composite structures
Cycles
Direct energy conversion and energy accumulation
Electrical conductivity
Electrical engineering. Electrical power engineering
Electrical power engineering
Electrochemical conversion: primary and secondary batteries, fuel cells
Exact sciences and technology
Graphene
Lithium-ion batteries
Materials
Spectra
Sulfides
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Summary:Here we develop a facile process for preparing few-layer SnS2/graphene (FL-SnS2/G) hybrid by solution-phase method employing l-cysteine as a complexing, sulfide source and reducing agent. The FL-SnS2/G hybrid is characterized by XRD, SEM and HRTEM. It is demonstrated that the few-layer SnS2 with defects or disorder structure supports on graphene surface. Electrochemical tests show the FL-SnS2/G hybrid exhibits an extraordinary capacity of up to 920 mAh g-1 with excellent cycling stability and high-rate capability. The significant improvement in the electrochemical performances is attributed to the robust composite structure and some synergistic interactions between few-layer SnS2 and graphene. Electrochemical impedance spectra confirm that the incorporation of graphene considerably improved the electric conductivity and electron rapid transfer of the FL-SnS2/G hybrid. Therefore, this new kind of FL-SnS2/G hybrid can be used as a promising anode material for lithium ion batteries.
ISSN:0378-7753
1873-2755
DOI:10.1016/j.jpowsour.2011.10.132