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Citation: LIU Min, WANG Qiong-Jie, XU Yu-Fu, SCHRAUBE Sebastian, HU Xian-Guo. Preparation and Tribological Properties of Li-intercalated Molybdenum Disulfide[J]. Chinese Journal of Applied Chemistry, ;2008, 25(2): 181-184. shu

Preparation and Tribological Properties of Li-intercalated Molybdenum Disulfide

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a Institute of Tribology, Hefei University of Technology, Hefei 230009;
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b Hochschule Darmstadt, University of Applied Sciences, Haardtring 100, D-64295 Darmstadt, Germany

Corresponding author: HU Xian-Guo,
Received Date: 15 February 2007
Available Online: 16 August 2007
Fund Project: 国家自然科学基金资助项目(50475071) (50475071)

Li-intercalated MoS₂ compounds(Li_xMoS₂) were prepared by intercalating MoS₂ with lithium in a solution of n-butyl lithium in hexane.The effects of reaction temperature,mass ratio of the reactants and reaction time were studied.It was found that Li_xMoS₂ could be obtained when the molar ratio of n-C₄H₉Li and MoS₂ was 5~9,temperature 30℃,and time 36~48 h under mechanical stirring.The MoS₂ suspensions with different intercalation degrees were produced after Li_xMoS₂ was exfoliated in water.MoS₂ with different intercalation contents were characterized with XRD,and it was concluded that the bigger the x value in Li_xMoS₂,the broader the diffraction peaks of MoS₂,the smaller the grain,and the worse the crystal lattice.The effect of variation of x in Li_xMoS₂ on the lubricity of the aqueous suspension of exfoliated Li_xMoS₂ was studied via four-ball tribometer.It was found that both friction coefficient and wear scar diameter decreased initially,and then increased with x value within a range of 0.618~1.39,and the best wear resistance and friction reduction were presented when the x in Li_xMoS₂ was 0.75.
- intercalation,
- MoS₂,
- tribological performance
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