Non-Nucleophilic Electrolyte Based on Ionic Liquid and Magnesium Bis(diisopropyl)amide for Rechargeable Magnesium-Ion Batteries

Lethesh, Kallidanthiyil Chellappan; Kvello, Jannicke; Tolchard, Julian R.; Dahl, Paul Inge; Hanetho, Sidsel Meli; Berthelot, Romain; Fiksdahl, Anne; Jayasayee, Kaushik

doi:10.1021/acsaem.0c01026

Cited by 16 publications

(7 citation statements)

References 69 publications

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“…Ionic liquids (ILs) are being used to replace conventional organic solvents in various applications because of their unique features such as inherent ionic conductivity, high thermal stability, wide liquid state temperature range, and high electrochemical stability (Wasserscheid and Welton, 2008) (Paul et al, 2020) (Lethesh et al, 2021) (Kermanioryani et al, 2016) (Grøssereid et al, 2019). Recently, the application of ionic liquid (IL) based electrolytes in energy storage devices has been an active area of research (Chellappan et al, 2020) (Bahadori et al, 2020) (Doherty, 2018) (Ma et al, 2018). The systematic measurement and analysis of IL electrochemical stability window (ESW) is essential in developing IL based electrochemical systems.…”

Section: Introductionmentioning

confidence: 99%

Temperature-Dependent Electrochemical Stability Window of Bis(trifluoromethanesulfonyl)imide and Bis(fluorosulfonyl)imide Anion Based Ionic Liquids

Lethesh

Bahaa²,

Abdullah³

et al. 2022

Front. Chem.

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The electrochemical stability of 22 commercially available hydrophobic ionic liquids was measured at different temperatures (288.15, 298.15, 313.15, 333.15 and 358.15 K), to systematically investigate ionic liquids towards electrolytes for supercapacitors in harsh weather conditions. Bis(trifluoromethanesulfonyl)imide and bis(fluorosulfonyl)imide anions in combination with 1-Butyl-1-methylpyrrolidinium, 1-Ethyl-3-methylimidazolium, N-Ethyl-N, N-dimethyl-N(2methoxyethyl)ammonium, 1-Methyl-1-(2-methoxyethyl)pyrrolidinium, N-Pentyl-N-methylpyrrolidinium, N, N-Diethyl-N-methyl-N-propylammonium, N, N-Dimethyl-N-ethyl-N-benzyl ammonium, N, N-Dimethyl-N-Ethyl-N-phenylethylammonium, N-Butyl-N-methylpiperidinium, 1-Methyl-1-propylpiperidinium, N-Tributyl-N-methylammonium, N-Trimethyl-N-butylammonium, N-Trimethyl-N-butylammonium, N-Trimethyl-N-propylammonium, N-Propyl-N-methylpyrrolidinium cations were selected for the study. Linear regression with a numerical model was used in combination with voltammetry experiments to deduce the temperature sensitivity of both anodic and cathodic potential limits (defining the electrochemical stability window), in addition to extrapolating results to 283.15 and 363.15 K. We evaluated the influence of the cations, anions, and the presence of functional groups on the observed electrochemical stability window which ranged from 4.1 to 6.1 V.

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Section: Introductionmentioning

confidence: 99%

Temperature-Dependent Electrochemical Stability Window of Bis(trifluoromethanesulfonyl)imide and Bis(fluorosulfonyl)imide Anion Based Ionic Liquids

Lethesh

Bahaa²,

Abdullah³

et al. 2022

Front. Chem.

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“…Moderate concentration of Cl – has been considered helpful not only to stabilize Mg 2+ but also to dissolve passivating species on the Mg anode, thereby hindering the formation of anodic passivation films and enabling reversible Mg plating/stripping. Recently, 1-ethyl-3-methylimidazolium tetrachloroaluminate [C 2 mim][AlCl 4 ] was introduced into MBA-based electrolytes for the first time and confirmed to support reversible Mg deposition–dissolution with ∼92% Coulombic efficiency on stainless steel (SS) . Nevertheless, extortionate proportions of Cl – in electrolytes could result in somewhat lower magnesium deposition cycling efficiency .…”

Section: Introductionmentioning

confidence: 99%

“…Recently, 1-ethyl-3-methylimidazolium tetrachloroaluminate [C 2 mim][AlCl 4 ] was introduced into MBA-based electrolytes for the first time and confirmed to support reversible Mg deposition−dissolution with ∼92% Coulombic efficiency on stainless steel (SS). 37 Nevertheless, extortionate proportions of Cl − in electrolytes could result in somewhat lower magnesium deposition cycling efficiency. 38 Most critically, the Cl element in the anionic component and its related ligand compounds could cause grievous corrosion to the common current collectors like SS, aluminum, and copper.…”

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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“…The functions of electrolytes include; transporting reactants or supporting species in bulk and providing electronic insulation between the electrodes/terminals (Dühnen et al, 2020). Currently applied electrolytes in electrochemical energy storage devices include aqueous (Susantyoko et al, 2019;Huang et al, 2019;Sharma et al, 2020;Sundaram and Appadoo, 2020;Minakshi Sundaram et al, 2016), organic solvents (Xia et al, 2017), deep eutectic solvents (Dinh et al, 2020;Jaumaux et al, 2020), and ionic liquids (ILs) (Gunday et al, 2019;Gunday et al, 2020;Chellappan et al, 2020). In SC, organic solvent-based electrolytes particularly suffer from various drawbacks like; high cost, safety issues, cumbersome synthesis and purification procedures and, low ionic conductivity (Bamgbopa et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Prospects and Design Insights of Neat Ionic Liquids as Supercapacitor Electrolytes

2021

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Ionic liquids present an opportunity to design efficient electrolytes for supercapacitors, which are among the most extensively studied electrochemical energy storage systems. Ionic liquids are promising candidates for supercapacitor electrolytes because they can eliminate issues associated with aqueous and organic solvent-based electrolytes, such as narrow operating potential windows, safety, and performance. The full potential of ionic liquids as electrolytes in supercapacitors need to be further explored due to promising previous efforts invested in ionic liquid-based electrolyte systems for supercapacitor. This review aims to provide an outlook on neat (pure) ionic liquids applied as supercapacitor electrolytes to isolate the prospects and influences of ionic liquids in supercapacitor electrolyte systems. This work primarily focuses on ionic liquid chemistry links to their performance in supercapacitor electrolytes. Deduced features of importance to supercapacitor performance include the presence of functional groups in the ionic liquids, the ionic liquids physicochemical and electrochemical properties. With the different classes of ionic liquids evaluated, ion size-pore size matching of ionic liquid electrolytes and electrode materials, respectively, affect resulting capacitances and energy densities. Several design strategies to enhance supercapacitor performance by improving ionic liquid transport and electrochemical properties are proposed. The proposed strategies and obtained insights consequently informed further discussions on challenges associated with the commercialization of ionic liquids electrolytes.

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Non-Nucleophilic Electrolyte Based on Ionic Liquid and Magnesium Bis(diisopropyl)amide for Rechargeable Magnesium-Ion Batteries

Cited by 16 publications

References 69 publications

Temperature-Dependent Electrochemical Stability Window of Bis(trifluoromethanesulfonyl)imide and Bis(fluorosulfonyl)imide Anion Based Ionic Liquids

Temperature-Dependent Electrochemical Stability Window of Bis(trifluoromethanesulfonyl)imide and Bis(fluorosulfonyl)imide Anion Based Ionic Liquids

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

Prospects and Design Insights of Neat Ionic Liquids as Supercapacitor Electrolytes

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