Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6614276 | Electrochimica Acta | 2014 | 7 Pages |
Abstract
Electrochemical performance of Cu2MoS4 was evaluated. When the cutoff potential is limited between 1.6 and 3.0 V, the material can give stable cycle performance of up to 100 mA h gâ1. However, the material shows slow kinetics within this region. The material can give a discharge capacity of up to 653 mA h gâ1 when discharged to 0.6 V vs. Li/Li+, with a first cycle efficiency of 61.3%. This corresponds to an insertion of 8.5 Li and an extraction of 5.2 Li from the material. XRD and XPS measurements both suggest Cu displacement from the material during discharge and charge, which is a possible reason for the poor cycle stability of the material. A reaction mechanism is proposed based on the XPS analysis. Better cycle performance is observed for Cu2MoS4/GO composite.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Denis Y.W. Yu, Rui Lin Lee, Ren Yi, Sing Yang Chiam, Phong D. Tran,