Exploring the use of EMImFSI ionic liquid as additive or co-solvent for room temperature sodium ion battery electrolytes

Benchakar, Mohamed; Naejus, Régine; Damas, Christine; Santos-Peña, J.

doi:10.1016/j.electacta.2019.135193

Cited by 21 publications

(14 citation statements)

References 74 publications

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“…However, when EMImFSI IL at 2% weight ratio, where EMIm is 1-ethyl-3-methylimidazolium, is applied as additive, it does not behave as well as FEC in terms of the capacity of hard carbon. Even so, this conclusion could not contradict the possibly positive effects of EMImFSI IL when used as a single solvent in electrolytes …”

Section: Interphase Manipulating Via Parental Electrolytesmentioning

confidence: 94%

“…Even so, this conclusion could not contradict the possibly positive effects of EMImFSI IL when used as a single solvent in electrolytes. 101 Sodium Salts. As another main participant in the solvation structure, the anion salts play a critical role in the electrolyte decomposition process together with solvents, which are very important for determining the electrolyte oxidization potentials.…”

Section: Electrolytesmentioning

confidence: 99%

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Manipulating Electrode/Electrolyte Interphases of Sodium-Ion Batteries: Strategies and Perspectives

Wang

Niu

Yin

et al. 2020

ACS Materials Lett.

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After the past decade's rapid development, the commercial demands for sodium ion batteries (SIBs) have been put on the schedule for large-scale energy storage. Even though the electrode-electrolyte interphases play a very important role in determining the overall battery performance in terms of high energy density and long-cycling stability, studies regarding their fundamental understanding and regulation strategies are still in their infancy. Herein, we comprehensively review the current research status and the challenging issues of the as-generated SIB interphases from three main aspects. Firstly, a fundamental understanding of the main body interphase layers is introduced through the development of their formation mechanism, their composition/structure, and the dynamic evolution process involved, all of which are highly responsible for the Na + ion transport behavior to determine the final kinetic diffusion. Then, interphase manipulation via the parental electrolyte is summarized in terms of electrolyte engineering strategies, such as the solvent/salt selection, the concentration effect, and the functional additive screening to build a more stable interphase layer for desirable electrochemical reversibility. Finally, potential effects from the chosen electrodes are discussed to provide necessary associations with the interphase formation and evolution. Critical challenges for building stable Na-based interphase are identified, and in particular, new ways of thinking about the interphase chemistry and the electrolyte chemistry based on SIBs, are strongly appealing. We believe that this work is likely to attract attention to the rational design of Na-based interphase layers towards high-energy and long-life-span batteries.

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Section: Interphase Manipulating Via Parental Electrolytesmentioning

confidence: 94%

Section: Electrolytesmentioning

confidence: 99%

Manipulating Electrode/Electrolyte Interphases of Sodium-Ion Batteries: Strategies and Perspectives

Wang

Niu

Yin

et al. 2020

ACS Materials Lett.

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“…This type of electrolyte consists of a sodium salt or blend of salts that remains liquid at room temperature. Only a few out of a diverse variety of possible salts have been proposed as an IL electrolyte for Na‐ion batteries, typically TFSI [63] or other fluorine‐containing anion with a pyrrolidinium or imidazolium cation [64] . Based on equivalent processes for Li‐ion cell research, IL salts are mixed using procedures typical for carbonate‐based liquid electrolytes, [65] sometimes preceded by a purification step such as heating under vacuum [63] .…”

Section: Combining and Mixingmentioning

confidence: 99%

“…Only a few out of a diverse variety of possible salts have been proposed as an IL electrolyte for Na‐ion batteries, typically TFSI [63] or other fluorine‐containing anion with a pyrrolidinium or imidazolium cation. [64] Based on equivalent processes for Li‐ion cell research, IL salts are mixed using procedures typical for carbonate‐based liquid electrolytes, [65] sometimes preceded by a purification step such as heating under vacuum. [63] IL electrolytes tend to be more viscous than typical liquid electrolytes, [65] and they may also be applied in combination with carbonate electrolyte solvents [66] or even integrated with a solid polymer gel electrolyte membrane.…”

Section: Combining and Mixingmentioning

confidence: 99%

Process‐Structure‐Formulation Interactions for Enhanced Sodium Ion Battery Development: A Review

Sawhney

Wahid²,

Griffin

et al. 2022

ChemPhysChem

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Before the viability of a cell formulation can be assessed for implementation in commercial sodium ion batteries, processes applied in cell production should be validated and optimized. This review summarizes the steps performed in constructing sodium ion (Na‐ion) cells at research scale, highlighting parameters and techniques that are likely to impact measured cycling performance. Consistent process‐structure‐performance links have been established for typical lithium‐ion (Li‐ion) cells, which can guide hypotheses to test in Na‐ion cells. Liquid electrolyte viscosity, sequence of mixing electrode slurries, rate of drying electrodes and cycling characteristics of formation were found critical to the reported capacity of laboratory cells. Based on the observed importance of processing to battery performance outcomes, the current focus on novel materials in Na‐ion research should be balanced with deeper investigation into mechanistic changes of cell components during and after production, to better inform future designs of these promising batteries.

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“…Besides the usage of ILs themselves as electrolytes, some authors have applied them as electrolyte additives. For example, very recently [ 48 ], [emim][NTf 2 ] was studied by cyclic voltammetry for usage as possible additive to the electrolyte in sodium ion batteries Electrochemical cycling of a hard carbon electrode reveals that the [NTf 2 ] - anion, mainly coming from the added ionic liquid, can introduce new peaks in the cyclic voltammograms or new steps in the galvanostatic discharge. The products of such degradation can make an interface which determines the cycling properties.…”

Section: Imidazolium-based Ionic Liquidsmentioning

confidence: 99%

Application of Ionic Liquids in Electrochemistry—Recent Advances

2020

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In this review, the roles of room temperature ionic liquids (RTILs) and RTIL based solvent systems as proposed alternatives for conventional organic electrolyte solutions are described. Ionic liquids are introduced as well as the relevant properties for their use in electrochemistry (reduction of ohmic losses), such as diffusive molecular motion and ionic conductivity. We have restricted ourselves to provide a survey on the latest, most representative developments and progress made in the use of ionic liquids as electrolytes, in particular achieved by the cyclic voltammetry technique. Thus, the present review comprises literature from 2015 onward covering the different aspects of RTILs, from the knowledge of these media to the use of their properties for electrochemical processes. Out of the scope of this review are heat transfer applications, medical or biological applications, and multiphasic reactions.

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Exploring the use of EMImFSI ionic liquid as additive or co-solvent for room temperature sodium ion battery electrolytes

Cited by 21 publications

References 74 publications

Manipulating Electrode/Electrolyte Interphases of Sodium-Ion Batteries: Strategies and Perspectives

Manipulating Electrode/Electrolyte Interphases of Sodium-Ion Batteries: Strategies and Perspectives

Process‐Structure‐Formulation Interactions for Enhanced Sodium Ion Battery Development: A Review

Application of Ionic Liquids in Electrochemistry—Recent Advances

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