Synthesis and electrochemical properties of tin-doped MoS₂ (Sn/MoS₂) composites for lithium ion battery applications

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• 作者：Lin Lu ; Feixia Min ; Zhaohui Luo ; Shiquan Wang ; Fei Teng…
• 关键词：Sn doping ; MoS2 ; Solvothermal synthesis ; Electrochemical properties ; Anode material ; Lithium ion battery ; Energy storage
• 刊名：Journal of Nanoparticle Research
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：18
• 期：12
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Nanotechnology; Inorganic Chemistry; Characterization and Evaluation of Materials; Physical Chemistry; Optics, Lasers, Photonics, Optical Devices;
• 出版者：Springer Netherlands
• ISSN：1572-896X
• 卷排序：18

文摘

SnO₂-MoO₃ composites were synthesized by using (NH₄)₆Mo₇O₂₄·4H₂O and SnCl₂·2H₂O as raw materials through a simple solvothermal method followed by pyrolysis. Tin-doped MoS₂ (Sn/MoS₂) flowers have been synthesized by a solvothermal method followed with annealing in Ar(H₂) atmosphere, with SnO₂-MoO₃, thioacetamide (TAA), and urea as starting materials. The doping and the content of Sn-doping play crucial roles in the morphology and electrochemical performance of the MoS₂. As anode materials for lithium ion battery (LIB), all Sn/MoS₂ composites exhibit both higher reversible capacity and better cycling performance at current density of 200 mA g−1, compared with MoS₂ without Sn doping. The achieved discharge capacity for Sn/MoS₂ composites is above 1000 mAh g−1 after 100 cycles with nearly 100% coulombic efficiency. The doping of metal Sn in MoS₂ can improve the conductivity of MoS₂ and significantly enhance its electrochemical properties. The good electrochemical performance suggests that the Sn/MoS₂ composite could be a promising candidate as a novel anode material for LIB application. Our present work provides a new approach to the fabrication of anode materials for LIB applications.