Raman Spectra of Alkali Halides

Krishnamurthy, N.; Krishnan, R. S.

doi:10.1007/978-1-4684-1902-3_8

Cited by 2 publications

(2 citation statements)

References 78 publications

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“…To avoid any alteration of the samples by the laser beam, spectra were acquired with a low power laser (~1 mW). Figure 3 clearly shows two main domains:Lattice modes “I-FN”: iodide compounds show the strongest vibrations in the frequency region 25–250 cm −1 22,23 , with the maxima peaking at ~56, 85 and 90 cm −1 , respectively for NaI, AgI (iodargyrite), and KI. The electronic shells of halogen ions and the lattice vibrations of halogen and first neighbours (FN) play an important role in the Raman scattering, as can be seen from the spectra of the three iodide crystalline compounds reported in Fig.…”

Section: Resultsmentioning

confidence: 99%

Iodine solubility and speciation in glasses

Cicconi

Pili

Grousset

et al. 2019

Sci Rep

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The study of iodine in glasses and melts is critical in many areas, from geosciences to materials science to waste management. Glasses in the ternary system Na 2 O-B 2 O 3 -SiO 2 were studied with the goal of identifying a glass matrix able to dissolve large quantities of this element, and to identify the main parameters affecting the solubility of iodine. Two sets of experiments were carried out: the first one with the aim of determining the solubility limit of iodine, and the second one to identify the structural variations occurring within the glass network upon iodine incorporation, and to identify the parameters influencing the most both iodine solubility and speciation. We demonstrated that there is a strong dependence of iodine incorporation on bulk chemistry and glass physical properties. A solubility limit of ~5 mol% I has been assessed for B 2 O 3 -rich glasses and of ~1 mol% for SiO 2 -rich ones, and this composition dependence has been explained by considering the fragility parameter of the glass network. Structural variations in the iodine local environment and in the glass network were characterized by Raman, X-ray Absorption Spectroscopy, and 11 B NMR. Spectroscopy data point out the coexistence of different I species within the glasses, with iodide being the predominant one, surrounded by Na + ions.

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Section: Resultsmentioning

confidence: 99%

Iodine solubility and speciation in glasses

Cicconi

Pili

Grousset

et al. 2019

Sci Rep

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“…The LiCl peak was not observed because of the symmetry properties, and most and in some cases all the fundamental modes of vibration are inactive in the Raman effect. 21 This implied that it was difficult for the starting materials with the simple heat-treatment to completely penetrate into the Li 6 PS 5 Cl crystal structure. On the other hand, Samples 1 and 2 showed a network of isolated PS 4 3− units making hexagonal cages, which were connected to each other by an interstitial site around the halide ions, 11,15 indicated by the peak around 415 cm −1 without any other impurity peaks.…”

Section: Resultsmentioning

confidence: 99%

Application of Rod-Like Li₆PS₅Cl Directly Synthesized by a Liquid Phase Process to Sheet-Type Electrodes for All-Solid-State Lithium Batteries

Choi

Ann

et al. 2018

J. Electrochem. Soc.

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All-solid-state lithium batteries employing sulfide-based solid electrolytes have emerged as promising next-generation batteries for large-scale energy storage applications because of their safety and high energy density. Among them, Li 6 PS 5 X (X = Cl, Br, I) with an argyrodite structure synthesized by planetary milling exhibits a rather high lithium ion conductivity of 10 −2 -10 −3 S cm −1 at room temperature. Unfortunately, the planetary milling process has the disadvantage of producing the solid electrolytes with large, round-shaped particles. Recently, the solid electrolytes have been synthesized by not the mechanical milling but the liquid-phase process, which facilitates synthesis of sub-micrometer-to nanometer-sized solid electrolyte particles. It is important to reduce the particle size of the solid electrolyte to promote intimate contact with the active material in the composite cathode. Here, rod-like Li 6 PS 5 Cl solid electrolyte with a high ionic conductivity of 1.1 × 10 −3 S cm −1 at room temperature was, for the first time, directly prepared by a liquid phase process using only a stirring method. SEM images showed the electrolyte had a rod-like morphology with a length of 20-30 μm and a width of 2-3 μm. The composite cathode was prepared from a slurry and the cell performances were investigated.

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Raman Spectra of Alkali Halides

Cited by 2 publications

References 78 publications

Iodine solubility and speciation in glasses

Iodine solubility and speciation in glasses

Application of Rod-Like Li₆PS₅Cl Directly Synthesized by a Liquid Phase Process to Sheet-Type Electrodes for All-Solid-State Lithium Batteries

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Raman Spectra of Alkali Halides

Cited by 2 publications

References 78 publications

Iodine solubility and speciation in glasses

Iodine solubility and speciation in glasses

Application of Rod-Like Li6PS5Cl Directly Synthesized by a Liquid Phase Process to Sheet-Type Electrodes for All-Solid-State Lithium Batteries

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Product

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Application of Rod-Like Li₆PS₅Cl Directly Synthesized by a Liquid Phase Process to Sheet-Type Electrodes for All-Solid-State Lithium Batteries