Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4766497 | Electrochemistry Communications | 2017 | 5 Pages |
â¢Mg stripping and deposition in the presence of Clâ and TFSIâ anions.â¢Increased polarisation when TFSIâ is added.â¢Detrimental effect of TFSIâ anions.â¢Lithium has minor influence on stripping and deposition of Mg.
Dual electrolyte systems based on APC electrolyte mixed with either LiCl or LiTFSI are compared in a hybrid Mg/Li4Ti5O12 battery. Their comparison points to the detrimental effect of TFSIâ anions on the battery performance through increase of polarization for Mg stripping and subsequent capacity fade. The effect is further explored through the study of Mg deposition/stripping in a dual electrolyte system and its comparison with conventional Mg electrolyte. Again, the detrimental effect of TFSIâ anions is confirmed through the increase of polarization and decrease of the Coulombic efficiency, while Clâ anions have a minor beneficial effect on both. We hypothesize that the passivation of Mg metal in TFSIâ anions containing electrolytes is the likely cause.
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