Structural Studies of Lithium 4,5-Dicyanoimidazolate–Glyme Solvates. 1. From Isolated Free Ions to Conductive Aggregated Systems

Jankowski, Piotr; Dranka, Maciej; Żukowska, G.Z.; Zachara, Janusz

doi:10.1021/acs.jpcc.5b01352

Cited by 24 publications

(79 citation statements)

References 29 publications

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“…The crystal structure of an equimolar mixture of Li[TFSA] and G4, [Li(G4)][TFSA], has also not been clarified as this complex is strongly prone to the supercooling state. However, the crystal structures of the [Na(G3)]X, [Na(G3) 2 ]X, [K(G4) 2 ]X, and [Li(G4)]X (X: anions other than [TFSA]) complexes have been reported elsewhere ,,,,…”

Section: Structure and Properties Of Na K And Mg‐based Silsmentioning

confidence: 99%

“…As evidenced from this spectral variation, the Lewis basicity of the anions has a critical impact on the stability of the solvate cation. The effect of anion choice on the structures and stability of solvate cations have extensively been studied especially for Li‐based SILs,,,,,, and incorporation of weak Lewis basic amide‐type anions is a very effective approach to create good SILs . The same approach is certainly applicable to Na, K and Mg‐based SILs.…”

Section: Structure and Properties Of Na K And Mg‐based Silsmentioning

confidence: 99%

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Solvate Ionic Liquids for Li, Na, K, and Mg Batteries

Mandai

Dokko

Watanabe

2018

The Chemical Record

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From the viewpoint of element strategy, non‐Li batteries with promising negative and positive electrodes have been widely studied to support a sustainable society. To develop non‐Li batteries having high energy density, research on electrolyte materials is pivotal. Solvate ionic liquids (SILs) are an emerging class of electrolytes possessing somewhat superior properties for battery applications compared to conventional ionic liquid electrolytes. In this account, we describe our recent efforts regarding SIL‐based electrolytes for Li, Na, K, and Mg batteries with respect to structural, physicochemical, and electrochemical characteristics. Systematic studies based on crystallography and Raman spectroscopy combined with thermal/electrochemical stability analysis showed that the balance of competitive cation−anion and cation−solvent interactions predominates the stability of the solvate cations. We also demonstrated battery applications of SILs as electrolytes for non‐Li batteries, particularly for Na batteries.

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Section: Structure and Properties Of Na K And Mg‐based Silsmentioning

confidence: 99%

Section: Structure and Properties Of Na K And Mg‐based Silsmentioning

confidence: 99%

Solvate Ionic Liquids for Li, Na, K, and Mg Batteries

Mandai

Dokko

Watanabe

2018

The Chemical Record

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“…Crystalline samples were prepared as previously described. 22 Solutions of 0.1−4 M of LiTDI in glyme (mono/di/tri/tetra) were prepared in glass vials, transferred to pans after stirring, and put in quartz tubes before measurements. LiTDI−PEO membranes were obtained as follows.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Coordination modes of the TDI anion found in glymes and corona ether solvates based on the XRD studies 22. …”

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confidence: 99%

Structural Studies of Lithium 4,5-Dicyanoimidazolate–Glyme Solvates. 2. Ionic Aggregation Modes in Solution and PEO Matrix

2015

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In this paper, we present complementary spectroscopic analyses of lithium 2-trifluoromethyl-4,5-dicyanoimidazole adducts with aprotic solvents like dimethyl ethers of poly(ethylene glycols) (i.e., glymes) and crown ethers. Comparing the XRD structures with Raman spectra we have found fingerprints of various structural motifs such as ionic pairs, dimers, "free ions", and higher aggregates. Comprehensive analysis of crystalline materials has been performed to correlate molecular structures with spectroscopic data, which give valuable information about the coordination preferences of substituted 4,5-dicyanoimidazolato anions and provide the basis for further developing a model for poly(ethylene oxide) electrolytes. Complementary and systematic X-ray studies of glyme adducts enable precise interpretation of the anion−cation and cation−solvent interactions from experimental Raman spectra. This information provides a convenient tool for the characterization of the ionic association interactions within electrolytes.

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“…On the other hand, we have investigated the systems containing LiTDI salt and glymes 12 13 . The papers by Jankowski et al .…”

mentioning

confidence: 99%

Ternary mixtures of ionic liquids for better salt solubility, conductivity and cation transference number improvement

Karpierz

Niedzicki

Trzeciak

et al. 2016

Sci Rep

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We hereby present the new class of ionic liquid systems in which lithium salt is introduced into the solution as a lithium cation−glyme solvate. This modification leads to the reorganisation of solution structure, which entails release of free mobile lithium cation solvate and hence leads to the significant enhancement of ionic conductivity and lithium cation transference numbers. This new approach in composing electrolytes also enables even three-fold increase of salt concentration in ionic liquids.

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Structural Studies of Lithium 4,5-Dicyanoimidazolate–Glyme Solvates. 1. From Isolated Free Ions to Conductive Aggregated Systems

Cited by 24 publications

References 29 publications

Solvate Ionic Liquids for Li, Na, K, and Mg Batteries

Solvate Ionic Liquids for Li, Na, K, and Mg Batteries

Structural Studies of Lithium 4,5-Dicyanoimidazolate–Glyme Solvates. 2. Ionic Aggregation Modes in Solution and PEO Matrix

Ternary mixtures of ionic liquids for better salt solubility, conductivity and cation transference number improvement

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