A robust ionic liquid magnesium electrolyte enabling Mg/S batteries

Bi, Yujing; He, Shuijian; Fan, Chuanbin; Luo, Jian; Yuan, Bing; Liu, Tianbiao

doi:10.1039/d0ta02041a

Cited by 26 publications

(20 citation statements)

References 26 publications

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“…The electrolyte containing the 1-ethyl-3-methylimidazolium cation (EMIm + ) and AlCl 3 -MgCl 2 solute exhibited a steady-state voltage of 2.3 V when matched to a V 2 O 5 cathode . It was also claimed that the electrolyte obtained by dissolving MgCl 2 , AlCl 3 , and Mg powder in the cosolvent of DME and 1-butyl-1-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide (Pyr 14 TFSI) could restrain the shuttle effect of magnesium polysulfide and enable a stable, high capacity Mg–sulfur battery . Furthermore, Pyr 14 TFSI could also be used as an intermedium solvent to synthesize the simple mononuclear salt [Mg(THF) 6 ][AlCl 4 ] 2 by adding MgCl 2 and AlCl 3 and stirring at 95 °C for 24 h. This one-step Mg 2+ desolvation lowers the energy barrier of the Mg deposit by thorough removal of chloride ions from the cationic group.…”

Section: Introductionmentioning

confidence: 99%

A Chlorine-Free Electrolyte Based on Non-nucleophilic Magnesium Bis(diisopropyl)amide and Ionic Liquid for Rechargeable Magnesium Batteries

Ren

Nuli

et al. 2021

ACS Appl. Mater. Interfaces

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The electrolyte based on magnesium bis(diisopropyl)amide (MBA), a low-cost and non-nucleophilic organic magnesium salt, is proposed to be an admirable alternative for rechargeable magnesium batteries but suffers from limited ionic conductivity and an inferior electrochemical window in the commonly used ether solvents. In this work, the 1-butyl-1-methylpiperidinium bis(trifluoromethyl sulfonyl)imide (PP14TFSI) ionic liquid as the cosolvent of tetrahydrofuran (THF) in chlorine-free MBA-based electrolytes has been first demonstrated to remarkably improve the ionic conductivity and broaden the oxidative stable potential (2.2 V vs Mg/Mg2+) on stainless steel. Reversible Mg electrochemical plating/stripping with a low overpotential below 200 mV and ca. 90% Coulombic efficiency are obtained. The current density of Mg plating/stripping is increased 238 times after the addition of PP14TFSI, where the mechanism of competitive coordination of TFSI– making an easier Mg plating/stripping is proposed theoretically. The MBA-2AlF3 electrolyte with a ratio-optimized THF/PP14TFSI cosolvent exhibits good compatibility with the Mo6S8 cathode. Furthermore, the Se@pPAN|Mg full cell exhibits an initial capacity of 447.8 mAh g–1 and as low as ∼0.66% capacity decay per cycle for more than 70 cycles at 0.2 C with the synergy of LiTFSI additives. The facile modification strategy of ionic liquid in the MBA-based electrolyte sheds inspiring light on exploring non-nucleophilic and chlorine-free electrolytes for practical rechargeable magnesium batteries.

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Section: Introductionmentioning

confidence: 99%

A Chlorine-Free Electrolyte Based on Non-nucleophilic Magnesium Bis(diisopropyl)amide and Ionic Liquid for Rechargeable Magnesium Batteries

Ren

Nuli

et al. 2021

ACS Appl. Mater. Interfaces

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“…An anode made of metallic Mg in the form of discs [21,63], plates [22], ribbons [64], or foils [21,23,24,65,66] has a low surface area [16]. Table 1 presents some Mg-S batteries using Mg anodes in the form of foil [22,25,28,52,[67][68][69][70][71][72], disc [13,21,30,73], foil disc [24,74], ribbons [64], and others. The largest group is those using Mg foil anodes.…”

Section: Metallic Mg Anodesmentioning

confidence: 99%

“…Table 1 presents some Mg-S batteries utilizing separator materials such as PTFE [25], PE film [21], borosilicate glass fiber sheet [71,90], glass fiber [22,26,28,30,52,67,68,72,74], Celgard microporous membrane [13,30,93], CNF-coated glass fiber [24], glass microfiber filter [70,73], ENTEK PE membrane [94], glass wool [98], and others. It is seen that the glass fiber separator is the most often used in Mg-S batteries.…”

Section: Separatorsmentioning

confidence: 99%

“…Table 1 presents some Mg-S batteries used as cathodes of the S/C type [15,25,26,67], S/CMK type [21,52,71,72,90], S/ACC type [22,30,70,74], S/CNTS type [15,24,73], S/MOFs type [68], MgPS/G-CNTs type [131], S/NG type [13], S/rGO type [93], S/MC type [64,94], S/CB type [98] and S/KB/PTFE type [28]. It is clearly seen that the S/C type, the S/CMK one, and the S/ACC one are the most often reported types of cathodes applied in Mg-S batteries.…”

Section: Cathodesmentioning

confidence: 99%

“…Bi et al [72] combined MgCl 2 /AlCl 3 /Mg (ratio of 1:1:1) within a DME (MMAC) electrolyte with IL, such as 1-butyl-1-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide (Pyr14TFSI), obtaining, as result, an MMAC-IL electrolyte of much better performance compared to the MMAC one.…”

Section: Chloride-containing Non/less Nucleophilic Electrolytesmentioning

confidence: 99%

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Life-Related Hazards of Materials Applied to Mg–S Batteries

Siczek

2022

Energies

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Nowadays, rechargeable batteries utilizing an S cathode together with an Mg anode are under substantial interest and development. The review is made from the point of view of materials engaged during the development of the Mg–S batteries, their sulfur cathodes, magnesium anodes, electrolyte systems, current collectors, and separators. Simultaneously, various hazards related to the use of such materials are discussed. It was found that the most numerous groups of hazards are posed by the material groups of cathodes and electrolytes. Such hazards vary widely in type and degree of danger and are related to human bodies, aquatic life, flammability of materials, or the release of flammable or toxic gases by the latter.

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Advancing Electrolyte Solution Chemistry and Interfacial Electrochemistry of Divalent Metal Batteries

et al. 2021

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Divalent metal (Mg, Ca, etc.) battery chemistries potentially provide a sustainable long‐term technical solution for large‐scale energy storage because of the high natural abundance of divalent metal elements in the earth crust. Good progress has been made on materials especially electrolyte development in the past years; however, significant challenges exist, particularly the very limited fundamental understanding of electrolyte solution chemistry and interfacial electrochemistry. In this perspective, we review and discuss key discoveries and understanding of divalent battery chemistry with a focus on electrolyte‐dependent interfacial electrochemistry of divalent metal anodes. A concise review of electrolyte development, operando studies of the electrified interfaces, and unique charge‐transfer process is provided; the knowledge gaps and future research directions are discussed.

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A robust ionic liquid magnesium electrolyte enabling Mg/S batteries

Abstract: An ionic liquid Mg electrolyte (MMAC-IL) is conveniently prepared by mixing MgCl2, AlCl3, Mg, and Pyr14TFSI. The MMAC-IL electrolyte with its great ionic strength can significantly suppress the shuttle effect of magnesium polysulfides and enabled a stable Mg–S battery.

Cited by 26 publications

References 26 publications

A Chlorine-Free Electrolyte Based on Non-nucleophilic Magnesium Bis(diisopropyl)amide and Ionic Liquid for Rechargeable Magnesium Batteries

A Chlorine-Free Electrolyte Based on Non-nucleophilic Magnesium Bis(diisopropyl)amide and Ionic Liquid for Rechargeable Magnesium Batteries

Life-Related Hazards of Materials Applied to Mg–S Batteries

Advancing Electrolyte Solution Chemistry and Interfacial Electrochemistry of Divalent Metal Batteries

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