Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
189964 | Electrochimica Acta | 2011 | 7 Pages |
Methyl phenyl bis-methoxydiethoxysilane (MPBMDS) was prepared and its effects were investigated as an additive in 1.0 mol dm−3 LiPF6-propylene carbonate (PC)/dimethyl carbonate (DMC) (1:1, v/v) electrolyte for lithium ion batteries. The electrochemical properties of the electrolyte with MPBMDS were characterized by discharge/charge tests, cyclic voltammetry, electrochemical impedance spectroscopy, scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The addition of MPBMDS can effectively prevent the decomposition and the co-intercalation of PC. In addition, burning tests showed that the addition of 4–13 wt.% MPBMDS to the bare PC-based electrolyte effectively reduces the flammability. This eco-friendly compound provides a new promising direction for the development of bi- or multi-functional additives for lithium ion batteries.
► Adding MPBMDS to PC-based electrolyte can prevent decomposition and co-intercalation of PC. ► Addition of 4–13 wt.% MPBMDS to bare PC-based electrolyte reduces flammability. ► A stable SEI film is formed on the surface of the CMS electrode.