Interlayer Distance Dependency of Lithium Storage in MoS<sub>2</sub> as Anode Material for Lithium-ion Batteries

Xiaofang Qian; Yourong Wang; Wei Zhou; Liping Zhang; Guangsen Song; Siqing Cheng

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Interlayer Distance Dependency of Lithium Storage in MoS₂ as Anode Material for Lithium-ion Batteries

机译：MoS _{2 作为锂离子电池负极材料的锂存储层间距离依赖性}

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Polyvinyl pyrrolidone (PVP) as dispersant was employed to assist the hydrothermal synthesis of MoS2.The results show that the interlayer distance of the as-obtained MoS2 is smaller compared with theoriginal MoS2 without PVP-assistance using XRD, SEM and TEM techniques for characterization.Investigations of the electrochemical performances of MoS2 with different interlayer distance as anodematerial for LIBs demonstrate that the specific capacity and the cycling performance of lithium storageof MoS2 is significantly dependent on the interlayer distance of MoS2, furthermore causing thedifferent mechanism of lithium storage. This might be attributed to the varied internal resistance andLi-ion diffusion in layered MoS2 due to the different interlayer distance, which is validated fromelectrochemical impedance spectroscope of MoS2 electrode.

机译：利用聚乙烯吡咯烷酮（PVP）作为分散剂辅助水热合成MoS2，结果表明，与未使用PVP的MoS2相比，采用XRD，SEM和TEM技术表征的MoS2的层间距离较小。对具有不同层间距离的MoS2作为LIBs阳极材料的电化学性能的研究表明，MoS2的锂储能的比容量和循环性能显着取决于MoS2的层间距离，进而引起锂储能的不同机理。这可能是由于层间距离不同导致层状MoS2的内部电阻变化和锂离子扩散所致，这一点已通过MoS2电极的电化学阻抗谱进行了验证。

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《International Journal of Electrochemical Science》 |2015年第4期|共8页
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Xiaofang Qian; Yourong Wang; Wei Zhou; Liping Zhang; Guangsen Song; Siqing Cheng;
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Interlayer Distance Dependency of Lithium Storage in MoS2 as Anode Material for Lithium-ion Batteries

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Interlayer Distance Dependency of Lithium Storage in MoS₂ as Anode Material for Lithium-ion Batteries