Phase equilibriums, ion association, and mechanisms of solvation in the LiN(CF3SO2)2-(CH3)2SO2 system

Гафуров, М. М.; Рабаданов, К. Ш.; Prisyazhnyi, V. D.; Tret’yakov, D. O.; Gorobets, M. I.; Kirillov, S. А.; Ataev, M. B.; Kakagasanov, M. M.

doi:10.1134/s0036024411090081

Cited by 13 publications

(4 citation statements)

References 15 publications

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“…Raman spectroscopy was also performed, and the results are given in Figures and S4. In the Raman spectra of Figures a and b, the peaks observed at 743, 746, and 750 cm –1 can be assigned to CF 3 bending vibrations of the TFSI anion in the free ions, contact ion pair (CIP), and aggregates (AGG), respectively. − Figure c shows that the relative proportion of free TFSI anions was always higher in the QSEs than in the liquid electrolytes. These results demonstrate that PCL in the QSE participates in lithium salt dissolution.…”

Section: Resultsmentioning

confidence: 88%

Quasi-Solid-State Electrolyte Synthesized Using a Thiol–Ene Click Chemistry for Rechargeable Lithium Metal Batteries with Enhanced Safety

Park

Jeong

Lim

et al. 2020

ACS Appl. Mater. Interfaces

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Liquid electrolytes currently used in lithium-ion batteries have critical drawbacks such as high flammability, high reactivity toward electrode materials, and solvent leakage. To overcome these issues, most recent research has focused on synthesis and characterization of highly conductive gel-type polymer electrolytes containing large numbers of organic solvents in the polymer matrix. There are still many hurdles to overcome, however, before they can be applied to commercial-level lithium-ion batteries. Since a large amount of organic solvent is required to achieve high ionic conductivity, battery safety is not significantly enhanced. In our study, we synthesized highly conductive quasi-solid-state electrolytes (QSEs) containing an ionically conductive oligomer (polycaprolactone triacrylate) and a small amount of organic solvent by employing click chemistry. In the QSE, polycaprolactone participates in dissociation of lithium salt and migration of lithium ions, resulting in high ionic conductivity. The Li/ LiNi 0.6 Co 0.2 Mn 0.2 O 2 cell that used this QSE exhibited good cycling performance and enhanced thermal stability, and durability; no organic solvent leakage was observed even under high pressure.

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Section: Resultsmentioning

confidence: 88%

Quasi-Solid-State Electrolyte Synthesized Using a Thiol–Ene Click Chemistry for Rechargeable Lithium Metal Batteries with Enhanced Safety

Park

Jeong

Lim

et al. 2020

ACS Appl. Mater. Interfaces

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“…Methylsulfonylmethane (MSM) as the solvate is valuable for forming a eutectic mixture with lithium salts, such as the LiN(CF 3 SO 2 ) 2 −MSM, LiBF 4 −MSM, LiClO 4 −MSM, and LiNO 3 −MSM system. 15,16 However, all of these nonaqueous DES can only be used at high temperatures that set an intrinsic limit on their practical applications of energy storage devices at low temperatures. For instance, MSM−LiClO 4 with a molar ratio of 1.8:1 has the melting point of 49 °C and still does not meet the criteria of room-temperature applications of batteries.…”

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confidence: 99%

“…In the literature, some effort has been devoted to nonaqueous deep eutectic solvents (DES) based on some organic solvates and lithium salts for the aqueous electrolyte for lithium-ion batteries. ,,− As is recognized, a nonaqueous DES always exhibits low vapor pressure, relatively wide liquid range, and nonflammability. Methylsulfonylmethane (MSM) as the solvate is valuable for forming a eutectic mixture with lithium salts, such as the LiN(CF 3 SO 2 ) 2 –MSM, LiBF 4 –MSM, LiClO 4 –MSM, and LiNO 3 –MSM system. , However, all of these nonaqueous DES can only be used at high temperatures that set an intrinsic limit on their practical applications of energy storage devices at low temperatures. For instance, MSM–LiClO 4 with a molar ratio of 1.8:1 has the melting point of 49 °C and still does not meet the criteria of room-temperature applications of batteries.…”

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confidence: 99%

Methylsulfonylmethane-Based Deep Eutectic Solvent as a New Type of Green Electrolyte for a High-Energy-Density Aqueous Lithium-Ion Battery

et al. 2019

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Currently used aqueous electrolytes for lithium-ion batteries suffer from narrow potential windows of <1.5 V. In this paper, we are the first to discover the new deep eutectic solvent (DES) electrolyte of the methylsulfonylmethane–lithium perchlorate–water system, which is a safe, environmentally friendly, and low-cost “water-in-salt” aqueous electrolyte. It is found that the lithium ion can coordinate with the oxygen atom in the SO double bond, perchlorate, and water molecule, retaining fluidity at room temperature when the molar ratios of MSM:LiClO4:H2O are 1.8:1:z (z > 0.3). This DES electrolyte performs with a satisfying electrochemical stability window (∼3.5 V), which enables the LiMn2O4/Li4Ti5O12 aqueous lithium-ion battery with both high energy density (>160 W h kg–1) and high capacity retention (72.2% after 1000 cycles). Overall, our study of this new deep DES electrolyte can enrich room-temperature “water-in-salt” aqueous electrolyte and offers new insights into exploring green aqueous electrolyte systems for lithium-ion batteries.

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“…"Chemically related to sulphonamides are sulfones. A few electrolytes composed of methylsulfonylmethane (MSM, also dimethylsulfone) and lithium salts (LiTFSI,149 LiNO3 and LiClO4 150 ) have been reported as promising electrolytes for medium-temperature LIBs. These systems were referred to as "salt-solvates", being formed by a mixture of a solvate and a salt, unlike a mixture of a solvate and a solvent as usual.…”

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confidence: 99%

Deep eutectics and analogues as electrolytes in batteries

Pietro

Mele

2021

Journal of Molecular Liquids

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Deep eutectic Solvents (DESs) are an emerging class of materials showing a marked depression in melting points compared to those of the neat constituents and characterized by a number of beneficial properties. DES research currently prospers and out of the multiple current applications, the electrochemistry field is likely the most flourishing. This detailed review emphasizes recent research efforts in order to apply type III and type IV DESs and their analogues as electrolytes for rechargeable cationic batteries. The recent developments in the last decade are outlined, framing outstanding achievements and open questions, and identifying future optimisation directions to overcome the existing challenges.

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Phase equilibriums, ion association, and mechanisms of solvation in the LiN(CF3SO2)2-(CH3)2SO2 system

Cited by 13 publications

References 15 publications

Quasi-Solid-State Electrolyte Synthesized Using a Thiol–Ene Click Chemistry for Rechargeable Lithium Metal Batteries with Enhanced Safety

Quasi-Solid-State Electrolyte Synthesized Using a Thiol–Ene Click Chemistry for Rechargeable Lithium Metal Batteries with Enhanced Safety

Methylsulfonylmethane-Based Deep Eutectic Solvent as a New Type of Green Electrolyte for a High-Energy-Density Aqueous Lithium-Ion Battery

Deep eutectics and analogues as electrolytes in batteries

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