Crystallographic and aluminum-27 NMR study on premelting phenomena in crystals of sodium tetrachloroaluminate

Krebs, Bernt; Greiwing, H.; Brendel, Claus; Taulèlle, Francis; Gaune‐Escard, M.; Berg, Rolf W.

doi:10.1021/ic00005a021

Cited by 16 publications

(12 citation statements)

References 6 publications

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“…Under ENR conditions, the quadrupolar coupling constant of the two Al-based species depends only on their molecular structure . The AlCl 4 – species shows the most significant broadening, which passes from ∼88 to ∼2000 Hz.…”

Section: Resultsmentioning

confidence: 99%

Physicochemical Characterization of AlCl₃–1-Ethyl-3-methylimidazolium Chloride Ionic Liquid Electrolytes for Aluminum Rechargeable Batteries

et al. 2017

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Al-ion batteries technology is receiving growing attention thanks to the high natural abundance of aluminum and to the high energy density that can be obtained with a three-electron redox process. In this work, the physicochemical properties of the room temperature ionic liquid composed of aluminum chloride and 1ethyl-3-methylimidazolium chloride ([EMIm]Cl) were systematically investigated by varying the molar ratio AlCl 3 /[EMIm]Cl in the range 1.1−1.7. The combined use of multinuclear ( 27 Al, 13 C, 1 H) NMR, electrochemical impedance spectroscopy, and thermal analysis allowed us to shed light on the structure−properties relationships of this complex system, also resolving some controversial conclusions of previous literature. We showed that the 1.2 molar ratio is the best compromise between high ionic conductivity and the use of the highly toxic AlCl 3 . This electrolyte was tested in a standard Al-ion cell and gave promising results even at very high current densities (i > 200 mA g −1 ).

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Section: Resultsmentioning

confidence: 99%

Physicochemical Characterization of AlCl₃–1-Ethyl-3-methylimidazolium Chloride Ionic Liquid Electrolytes for Aluminum Rechargeable Batteries

et al. 2017

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“…Furthermore, at least for the 1 : 1 molar ratio powder an additional endothermic peak at about 150 C was expected since the melting of the ternary chloride NaAlCl 4 occurs at this temperature. 25 This is actually not observed in any of the DSC measurements which could be explained by incongruent melting of this phase. Due to the high volatility of AlCl 3 , an equimolar melt is seldom possible.…”

Section: Thermal Characterisationmentioning

confidence: 91%

Novel sodium aluminium borohydride containing the complex anion [Al(BH4,Cl)4]−

et al. 2011

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The synthesis of a novel alkali-metal aluminium borohydride NaAl(BH4)xCl4-x from NaBH4 and AlCl3 using a solid state metathesis reaction is described. Structure determination was carried out using synchrotron powder diffraction data and vibrational spectroscopy. An orthorhombic structure (space group Pmn2(1)) is formed which contains Na+ cations and complex [Al(BH4,Cl)4]- anions. Due to the high chlorine content (1 < or = x < or = 1.43) the hydrogen density of the borohydride is only between 2.3 and 3.5 wt.% H2 in contrast to the expected 14.6 wt.% for chlorine free NaAl(BH4)4. The decomposition of NaAl(BH4)xCl4-x is observed in the target range for desorption at about 90 degrees C by differential scanning calorimetry (DSC), in situ Raman spectroscopy and synchrotron powder X-ray diffraction. Thermogravimetric analysis (TG) shows extensive mass loss indicating the loss of H2 and B2H6 at about 90 degrees C followed by extensive weight loss in the form of chloride evaporation.

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“…The temperature dependence (from 15 to 418 K) of the AH 2 Raman spectrum has been investigated, and a crystal phase change in the temperature range 200-270 K has been identified (48). (It is interesting that this phase change, detected by short time scale spectroscopy, did not influence the average structure-based on long timescale diffraction experiments-compare (24)-(26)-but such behaviors have been seen for others crystals, as discussed in, for example, (49)(50)(51).) Infrared spectra of AH 2 in the polycrystalline state and in aqueous solution have been presented by Bichara et al (52).…”

Section: Raman Vibrational Spectroscopymentioning

confidence: 98%

Investigation ofL(+)-Ascorbic acid with Raman spectroscopy in visible and UV light

Berg

2014

Applied Spectroscopy Reviews

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Crystallographic and aluminum-27 NMR study on premelting phenomena in crystals of sodium tetrachloroaluminate

Cited by 16 publications

References 6 publications

Physicochemical Characterization of AlCl₃–1-Ethyl-3-methylimidazolium Chloride Ionic Liquid Electrolytes for Aluminum Rechargeable Batteries

Physicochemical Characterization of AlCl₃–1-Ethyl-3-methylimidazolium Chloride Ionic Liquid Electrolytes for Aluminum Rechargeable Batteries

Novel sodium aluminium borohydride containing the complex anion [Al(BH4,Cl)4]−

Investigation ofL(+)-Ascorbic acid with Raman spectroscopy in visible and UV light

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Crystallographic and aluminum-27 NMR study on premelting phenomena in crystals of sodium tetrachloroaluminate

Cited by 16 publications

References 6 publications

Physicochemical Characterization of AlCl3–1-Ethyl-3-methylimidazolium Chloride Ionic Liquid Electrolytes for Aluminum Rechargeable Batteries

Physicochemical Characterization of AlCl3–1-Ethyl-3-methylimidazolium Chloride Ionic Liquid Electrolytes for Aluminum Rechargeable Batteries

Novel sodium aluminium borohydride containing the complex anion [Al(BH4,Cl)4]−

Investigation ofL(+)-Ascorbic acid with Raman spectroscopy in visible and UV light

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Product

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Physicochemical Characterization of AlCl₃–1-Ethyl-3-methylimidazolium Chloride Ionic Liquid Electrolytes for Aluminum Rechargeable Batteries

Physicochemical Characterization of AlCl₃–1-Ethyl-3-methylimidazolium Chloride Ionic Liquid Electrolytes for Aluminum Rechargeable Batteries