Ionic liquid/tetraglyme hybrid Mg[TFSI]2 electrolytes for rechargeable Mg batteries
The electrochemical reversibility of Mg in hybrid electrolytes based on mixtures of ionic liquid and glyme based organic solvents was investigated for applications in rechargeable magnesium batteries (RMBs). The electrolytes demonstrate reversible reduction and oxidation of Mg only after being pre-t...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2019-04-01
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| Series: | Green Energy & Environment |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2468025718300967 |
| _version_ | 1831551305675440128 |
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| author | Zheng Ma Maria Forsyth Douglas R. MacFarlane Mega Kar |
| author_facet | Zheng Ma Maria Forsyth Douglas R. MacFarlane Mega Kar |
| author_sort | Zheng Ma |
| collection | DOAJ |
| description | The electrochemical reversibility of Mg in hybrid electrolytes based on mixtures of ionic liquid and glyme based organic solvents was investigated for applications in rechargeable magnesium batteries (RMBs). The electrolytes demonstrate reversible reduction and oxidation of Mg only after being pre-treated with the dehydrating agent, magnesium borohydride, Mg[BH4]2, highlighting the importance of removing water in Mg based electrolytes. The addition magnesium di[bis(trifluoromethanesulfonyl)imide] (Mg[TFSI]2) (0.3 M) to N-butyl-n-methyl-pyrrolidinium bis(trifluoromethanesulfonyl)imide [C4mpyr][TFSI]/tetraglyme at a mole ratio of 1:2 showed stable CV cycling over almost 300 cycles while scanning electron microscopy (SEM) and X-ray diffraction (XRD) confirmed Mg deposition, showing non-dendritic morphology and a well-aligned growth. Further thermogravimetric analysis (TGA) demonstrated a mass retention of 79% at 250 °C for this electrolyte suggesting that the presence of the ionic liquid increases thermal stability substantially making these hybrid electrolytes compatible for RMBs. Keywords: Mg[TFSI]2, Ionic liquids, Tetraglyme, Rechargeable Mg battery, Mg[BH4]2 dehydrate reagent |
| first_indexed | 2024-12-17T03:07:45Z |
| format | Article |
| id | doaj.art-699274099d6c4043923777ec5d7867ea |
| institution | Directory Open Access Journal |
| issn | 2468-0257 |
| language | English |
| last_indexed | 2024-12-17T03:07:45Z |
| publishDate | 2019-04-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Green Energy & Environment |
| spelling | doaj.art-699274099d6c4043923777ec5d7867ea2022-12-21T22:05:55ZengKeAi Communications Co., Ltd.Green Energy & Environment2468-02572019-04-0142146153Ionic liquid/tetraglyme hybrid Mg[TFSI]2 electrolytes for rechargeable Mg batteriesZheng Ma0Maria Forsyth1Douglas R. MacFarlane2Mega Kar3School of Chemistry, Faculty of Science, Monash University, VIC 3800, AustraliaARC Centre of Excellence for Electromaterials Science, IFM – Institute for Frontier Materials, Deakin University, Burwood VIC 3125, AustraliaSchool of Chemistry, Faculty of Science, Monash University, VIC 3800, AustraliaSchool of Chemistry, Faculty of Science, Monash University, VIC 3800, Australia; Corresponding author.The electrochemical reversibility of Mg in hybrid electrolytes based on mixtures of ionic liquid and glyme based organic solvents was investigated for applications in rechargeable magnesium batteries (RMBs). The electrolytes demonstrate reversible reduction and oxidation of Mg only after being pre-treated with the dehydrating agent, magnesium borohydride, Mg[BH4]2, highlighting the importance of removing water in Mg based electrolytes. The addition magnesium di[bis(trifluoromethanesulfonyl)imide] (Mg[TFSI]2) (0.3 M) to N-butyl-n-methyl-pyrrolidinium bis(trifluoromethanesulfonyl)imide [C4mpyr][TFSI]/tetraglyme at a mole ratio of 1:2 showed stable CV cycling over almost 300 cycles while scanning electron microscopy (SEM) and X-ray diffraction (XRD) confirmed Mg deposition, showing non-dendritic morphology and a well-aligned growth. Further thermogravimetric analysis (TGA) demonstrated a mass retention of 79% at 250 °C for this electrolyte suggesting that the presence of the ionic liquid increases thermal stability substantially making these hybrid electrolytes compatible for RMBs. Keywords: Mg[TFSI]2, Ionic liquids, Tetraglyme, Rechargeable Mg battery, Mg[BH4]2 dehydrate reagenthttp://www.sciencedirect.com/science/article/pii/S2468025718300967 |
| spellingShingle | Zheng Ma Maria Forsyth Douglas R. MacFarlane Mega Kar Ionic liquid/tetraglyme hybrid Mg[TFSI]2 electrolytes for rechargeable Mg batteries Green Energy & Environment |
| title | Ionic liquid/tetraglyme hybrid Mg[TFSI]2 electrolytes for rechargeable Mg batteries |
| title_full | Ionic liquid/tetraglyme hybrid Mg[TFSI]2 electrolytes for rechargeable Mg batteries |
| title_fullStr | Ionic liquid/tetraglyme hybrid Mg[TFSI]2 electrolytes for rechargeable Mg batteries |
| title_full_unstemmed | Ionic liquid/tetraglyme hybrid Mg[TFSI]2 electrolytes for rechargeable Mg batteries |
| title_short | Ionic liquid/tetraglyme hybrid Mg[TFSI]2 electrolytes for rechargeable Mg batteries |
| title_sort | ionic liquid tetraglyme hybrid mg tfsi 2 electrolytes for rechargeable mg batteries |
| url | http://www.sciencedirect.com/science/article/pii/S2468025718300967 |
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