Studies on the Electrodeposition of Magnesium in Ionic Liquids

Cheek, Graham T.; O’Grady, W.E.; Abedin, Sherif Zein El; Moustafa, E. M.; Endres, Frank

doi:10.1149/1.2804763

Cited by 120 publications

(98 citation statements)

References 12 publications

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“…One of the most serious issues is on the Mg negative electrode, i.e., the reversible Mg plating and stripping hardly realized in the various electrolyte solutions, because of the formation of insulating surface film. [2][3][4][5] Although the Grignard reagent based solutions can achieve the high reversible Mg plating and stripping reaction, 1,6,7 the solutions have critical disadvantages, such as low ionic conductivity, poor chemical and electrochemical stability. Recently, however, it was reported that the reversible Mg plating and stripping was achieved with Mg(N(CF 3 SO 2 ) 2 ) 2 (Mg(TFSA) 2 ) dissolved in triethyleneglycol dimethyl ether (triglyme) based solutions.…”

Section: Introductionmentioning

confidence: 99%

The Effect of the Cyclic Ether Additives to the Ethereal Electrolyte Solutions for Mg Secondary Battery

et al. 2016

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The effect of crown ether additives for the electrolyte solution containing Mg(N(CF 3 SO 2 ) 2 ) 2 (Mg(TFSA) 2 ) was studied. Mg(TFSA) 2 salt hardly dissolved in tetrahydrofuran, while 1 mol dm −3 solution was obtained by 18-crown-6 (18C6) ether addition and the 10 −3 S cm −1 order of ionic conductivity was achieved. From the FT-IR spectrum, the predominantly coordination between Mg 2+ -ion and 18C6 was indicated. Cyclic voltammogram showed the redox current, which indicated that the reversible Mg plating and stripping reaction took place, while the clear redox current did not appear in the additive-free solution. From the results, we concluded the specific solvation structure of Mg 2+ -ion by 18C6 ether would play the effective role for the reversible Mg plating and stripping reaction.

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Section: Introductionmentioning

confidence: 99%

The Effect of the Cyclic Ether Additives to the Ethereal Electrolyte Solutions for Mg Secondary Battery

et al. 2016

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“…We first reported the electrodeposition of magnesium in imidazolium-based and piperidine-based ionic liquids [26][27][28][29]. Cheek et al studied the electrodeposition of magnesium in imidazolium-based ILs and pyrrole-based ILs containing a Grignard reagent or several inorganic magnesium salts [30]. Recently, Morita et al [31,32] reported Mg electrodeposition from the electrolyte consisted of quaternary ammonium-based ILs with Grignard reagents or simple Mg salt, and they also synthesized a series of imidazolium-based ILs and examined the electrodeposition of magnesium from the solution mixed the ILs with a Grignard reagent [33].…”

Section: Introductionmentioning

confidence: 99%

Reversible Deposition and Dissolution of Magnesium from Imidazolium-Based Ionic Liquids

Zhao

Nuli

Nasiman

et al. 2012

International Journal of Electrochemistry

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The electrochemical performance of six imidazolium cation-based ionic liquids (ILs) containing 0.3 mol L −1 Mg(CF 3 SO 3 ) 2 as the electrolytes for magnesium deposition-dissolution was examined by cyclic voltammogramms and constant current dischargecharge techniques. Scanning electron microscopy and energy dispersive X-ray spectroscopy measurements were conducted to characterize the morphologies and components of the deposits. The cathodic satiability of imidazolium cations can be improved by increasing the length of alkyls at the 1-position and introducing methyl group at the 2-position of the imidazolium cations. A reversible magnesium deposition-dissolution can be achieved at room temperature. After adding appreciate amount of tetrahydrofuran (THF) organic solvent, the conductivity and the peak currents for Mg deposition and dissolution can be significantly improved. The potential polarization of deposition-dissolution process is decreased using Mg powder electrode.

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“…ILs have been applied as "ionic solvents" of the electrolytes containing organo-magnesium complexes, and the resulting Mg-complex/IL systems can be worked as efficient electrolytes for reversible Mg deposition-dissolution. [32][33][34][35][36] As a result, higher efficiencies of Mg deposition-dissolution were achieved in those systems than that without IL. Recently, Bertasi et al reported Mg electrolytes based on 1-ethyl-3-methylimidazolium chloride (EMImCl) with AlCl 3 and amorphous δ-MgCl 2 exhibited highly reversible behavior.…”

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confidence: 97%

Magnesium Borohydride-Based Electrolytes Containing 1-butyl-1-methylpiperidinium bis(trifluoromethyl sulfonyl)imide Ionic Liquid for Rechargeable Magnesium Batteries

Nuli

Wang

et al. 2016

J. Electrochem. Soc.

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The electrolytes containing halide-free inorganic magnesium salt Mg(BH 4 ) 2 dissolved in ether solvents have shown reversible Mg deposition-dissolution performance. Herein, we improved the anodic stability of the electrolytes on non-inert stainless-steel electrode by mixing PP 14 TFSI ionic liquid with tetraglyme (TG) and dimethoxyethane (DME) ether solvents. The effect of mixing ratios and salt concentrations on the electrochemical behavior of the electrolyte were investigated. High anodic stability, good ionic conductivity, excellent cycling efficiency, feasibility of the preparation and good compatibility toward Mo 6 S 8 and TiO 2 insertion cathode make the electrolytes promising for the potential application in rechargeable magnesium batteries. 3-5 The development of magnesium electrolytes is considered as the most important challenge for the commercial application of rechargeable magnesium batteries because electrolyte properties govern battery performance and determine the class of cathodes to be utilized. 6 The significant progress is the reports of 0.25 mol L −1 Mg(AlCl 2 BuEt) 2 /THF (Bu=butyl, Et=ethyl) electrolyte 7,8 and 0.4 mol L −1 (PhMgCl) 2 -AlCl 3 /THF electrolyte, 9,10 which have high anodic stability (2.5 V and 3.3 V vs. Mg RE on inert Pt electrode, respectively) and reversibility of Mg deposition-dissolution. Recently, a family of novel boron based electrolytes with high ionic conductivity, excellent Mg deposition reversibility as well as high anodic potential were proposed.11,12 On the other hand, phenolate-based 13 and alkoxide-based 14 electrolytes exhibit air insensitive character and excellent magnesium depositiondissolution performance. Meanwhile, inorganic magnesium salt solutions synthesized by the acid-base reaction of MgCl 2 and Lewis acidic compounds such as AlCl 3 show high coulombic efficiency, low overpotential for magnesium deposition-dissolution and good anodic stability. [15][16][17][18] However, these electrolytes may corrode non-inert current collectors at lower anodic potentials duo to the presence of halides in the cation and anion components of the electrolytes, although some of these electrolytes have shown impressive stability against electrochemical oxidation.19 Hence, it is still necessary to find electrolytes with high stabilities on non-inert current collectors for a practical rechargeable Mg battery system. Nelson et al. showed that decreasing the chloride content in Mg electrolytes by switching the Lewis acid from AlCl 3 to Al(OPh) 3 greatly improves the anodic stability up to 5 V on both Pt and stainless steel electrodes.20 Ha et al. proposed a new class of electrolytes based on magnesium (II) bis(trifluoromethane sulfonyl)imide (Mg[N-(SO 2 CF 3 ) 2 ] 2 , Mg(TFSI) 2 ) dissolved in glymebased solvents with unique characteristics such as highly reduced corrosive nature toward the current collector, low volatility, high solvating power, and the ability to form an appropriate solvation sheath structure for Mg deposition-dissolution. 21 Recently, a whole new promisi...

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Studies on the Electrodeposition of Magnesium in Ionic Liquids

Cited by 120 publications

References 12 publications

The Effect of the Cyclic Ether Additives to the Ethereal Electrolyte Solutions for Mg Secondary Battery

The Effect of the Cyclic Ether Additives to the Ethereal Electrolyte Solutions for Mg Secondary Battery

Reversible Deposition and Dissolution of Magnesium from Imidazolium-Based Ionic Liquids

Magnesium Borohydride-Based Electrolytes Containing 1-butyl-1-methylpiperidinium bis(trifluoromethyl sulfonyl)imide Ionic Liquid for Rechargeable Magnesium Batteries

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