In-situ neutron diffraction study of the MoS2 anode using a custom-built Li-ion battery

Authors

Neeraj Sharma, The Bragg Institute
Guodong DuFollow
A J Studer
Zaiping Guo, University of WollongongFollow
Vanessa K. Peterson, The Bragg Institute, KirraweeFollow

RIS ID

38612

Publication Details

Sharma, N., Du, G., Studer, A. J., Guo, Z. Peterson, V. K. (2011). In-situ neutron diffraction study of the MoS₂ anode using a custom-built Li-ion battery. Solid State Ionics, 199-200 (1), 37-43.

Abstract

This work presents the first in-situ neutron diffraction study of the MoS₂ electrode, undertaken in a custom-built Li-ion battery during discharge. A review of custom-designed cells for in-situ neutron diffraction experiments is presented along with our optimised cell, which we use to show real-time information corresponding to Li-insertion into MoS₂via disappearance of the (103) reflection and increase in the d-spacing of the (002) reflection. The changes in the diffraction patterns begin at the 1.1 V plateau and are complete during the 0.5 V plateau. Sequential Rietveld-refinement indicates the presence of an intermediate lithiated phase (Li_xMoS₂) between MoS₂ and LiMoS₂. We observe the disappearance of all reflections for the MoS₂, corresponding to the loss of long-range order, during the 0.5 V plateau and no new diffraction peaks appear with further electrochemical cycling. This result is indicative of a transformation from long-range ordered MoS₂ to short-range ordered LiMoS₂, a result that we confirm using ex-situ synchrotron X-ray and neutron diffraction.