Enhanced electrochemical performance of MoS 2 for lithium ion batteries by simple chemical lithiation

Authors

Dan Li, University of WollongongFollow
Chaofeng Zhang, University of WollongongFollow
Guodong Du, University of Western SydneyFollow
Rong Zeng, University of Western SydneyFollow
Shiquan Wang, Hubei University
Zaiping Guo, University of WollongongFollow
Zhixin Chen, University of WollongongFollow
Hua-Kun Liu, University of WollongongFollow

RIS ID

68826

Publication Details

Li, D., Zhang, C., Du, G., Zeng, R., Wang, S., Guo, Z., Chen, Z. & Liu, H. (2012). Enhanced electrochemical performance of MoS₂ for lithium ion batteries by simple chemical lithiation. Journal of the Chinese Chemical Society, 59 (10), 1196-1200.

Abstract

Commercial MoS₂ was lithiated by soaking in butyllithium in argon atmosphere. The lithiated samples (Li_xMoS₂) exhibited greatly improved electrochemical performance. Li_xMoS₂ showed a high reversible capacity of 669.5 mAh g-1 and excellent cycling stability, with an average capacity loss of merely 0.065% per cycle. The rate capability of the Li_xMoS₂ electrode was also improved compared to that of the unlithiated MoS₂ electrode. The x-ray diffraction and high resolution transmission electron microscopy (TEM) results prove that there was an increase in the c lattice parameter for the lithiated material. The magnetic properties and evaluations of conductivity in MoS₂ and Li_xMoS₂ show that the electric conductivity of Li_xMoS₂ is much higher than that of MoS₂. TEM images after 11 cycles demonstrated that the Li_xMoS₂ electrode consisted of more uniform small particles, while big particle blocks could be observed for the MoS₂ electrode. All of these might be favourable for the electrochemical performance.transmission electron microscopy (TEM) results prove that there was an increase in the c lattice parameter for the lithiated material. The magnetic properties and evaluations of conductivity in MoS2 and LixMoS2 show that the electric conductivity of LixMoS2 is much higher than that of MoS2. TEM images after 11 cycles demonstrated that the LixMoS2 electrode consisted of more uniform small particles, while big particle blocks could be observed for the MoS2 electrode. All of these might be favourable for the electrochemical performance.