Hydrogen bonding.  VI.  Structural and infrared spectral analysis of lithium hydroxide monohydrate and cesium and rubidium hydroxide hydrates

Gennick, Irene.; Harmon, Kenneth M.

doi:10.1021/ic50151a037

Cited by 47 publications

(24 citation statements)

References 41 publications

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“…In our study, X represents OH À due to the synthesizing process we adopted. A similar IR band, at 2965 cm À1 , was observed in a study of LiOH·H 2 O (Gennick and Harmon, 1975). The agreement between 3032 cm À1 and 2965 cm À1 indicates that the band at 3032 cm À1 can also arise from n(OH) of hydrated hydroxide anions in interlayers of our LIG.…”

Section: Relationships Between Lithiophorite Birnessite and Ligsupporting

confidence: 85%

Characterization and a Fast Method for Synthesis of Sub-Micron Lithiophorite

Yang

Wang

2003

Clays and clay miner.

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Lithiophorite is a naturally occurring phyllomanganate which has been identified in soils and ores. Studies on a synthetic version have shed light on the conditions required for the formation of lithiophorite. In this study, we successfully prepared lithiophorite under highly alkaline conditions. In addition, we found that Li + , Al 3+ and hydrothermal treatment are all necessary for the formation of lithiophorite. Lithiophorite, birnessite and Li-intercalated gibbsite were examined by infrared (IR) spectroscopy. The Mn oxide sheets of lithiophorite and birnessite were found to have quite similar structural environments. On the other hand, the LiAl 2 (OH) 6 sheets are affected more markedly by the Mn oxide sheets. After intercalation, the symmetry of the six interlayer OH groups of LiAl 2 (OH) 6 is reduced and they are divided into two groups occupying different sites, corresponding to the IR absorption bands at 3480 and 3312 cm À1 , respectively.

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Section: Relationships Between Lithiophorite Birnessite and Ligsupporting

confidence: 85%

Characterization and a Fast Method for Synthesis of Sub-Micron Lithiophorite

Yang

Wang

2003

Clays and clay miner.

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“…The crystal water is further responsible for the appearance of typical water bands from the stretching (2965 cm −1 , broad), the deformation (1570 cm −1 ), the torsional (1005 cm −1 ), and the rocking vibration (860 cm −1 ). 43 Neither bands of LiOH nor LiOH · H 2 O could be observed for any of the cathodes discharged in water-free or watercontaining electrolyte (see also inset of Figure 4). In contrast, for the cathode discharged in a catholyte with 1% of water, carbonate was detected by its asymmetric stretching vibration band around 1500 cm −1 , which was previously assigned to the decomposition of the glymebased electrolyte.…”

Section: Resultsmentioning

confidence: 96%

The Influence of Water and Protons on Li₂O₂Crystal Growth in Aprotic Li-O₂Cells

Schwenke

Metzger

Restle

et al. 2015

J. Electrochem. Soc.

227

285

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Aprotic Li-O 2 cells have attracted considerable research interest due to its outstandingly high theoretical specific capacity. However, published discharge capacities vary considerably among different researchers despite only minor differences in the tested cell components. Some research groups observe low discharge capacities and formation of passivating layers of Li 2 O 2 on the electronically conducting cathode support, while other groups report large capacities and toroidal Li 2 O 2 crystals as discharge product. In this study we show that these differences may be due to water and protons, both possible impurities in Li-O 2 cells, having a large effect on discharge capacity and Li 2 O 2 morphology. As evidenced by XRD, FTIR and UV-visible analysis, Li 2 O 2 is still the main discharge product in Li-O 2 cells containing water, and moreover the Li 2 O 2 yield increases with the concentration of water in the electrolyte. On-line electrochemical mass spectrometry was employed to understand the differences in the discharge-charge behavior due to the addition of water and protons. While water seems to get oxidized at high potentials during charge, protons are consumed at the beginning of the discharge leading to a variety of reactive oxygen species and thus to degradation of cell components.

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“…1 The presence of water in the compounds markedly alters their properties and behavior. 4 The possibility of isotopic substitution on all three elements makes LiOH·H 2 O a particularly attractive subject for vibrational spectroscopy consequently, it has been studied by both infrared [5][6][7][8] and Raman spectroscopy. This is particularly the case for the water librational modes and these have been extensively studied in a large number of cases.…”

Section: Introductionmentioning

confidence: 99%

Assignment of the vibrational spectra of lithium hydroxide monohydrate, LiOH·H2O

Parker

Refson

Bewley

et al. 2011

The Journal of Chemical Physics

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The assignment of the vibrational spectra of lithium hydroxide monohydrate, LiOH·H(2)O, has been controversial for more than half-a-century. Here we show that only the combination of all three forms of vibrational spectroscopy: infrared, Raman and inelastic neutron scattering spectroscopies coupled with periodic-density functional theory calculations is able to satisfactorily assign the spectra. All previous work based on empirical criteria is, at least partially, incorrect. The librational modes of water do not follow the expected rock > wag > twist order and the calculations indicate that complete or partial deuterium substitution would not be useful in assigning the modes.

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Hydrogen bonding. VI. Structural and infrared spectral analysis of lithium hydroxide monohydrate and cesium and rubidium hydroxide hydrates

Abstract: From data at 25°and ionic strength 1.0 M in various media, assuming negligible temperature dependence over the range 5-20°, as has been found at zero ionic strength.16 (20) F.

Cited by 47 publications

References 41 publications

Characterization and a Fast Method for Synthesis of Sub-Micron Lithiophorite

Characterization and a Fast Method for Synthesis of Sub-Micron Lithiophorite

The Influence of Water and Protons on Li₂O₂Crystal Growth in Aprotic Li-O₂Cells

Assignment of the vibrational spectra of lithium hydroxide monohydrate, LiOH·H2O

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Hydrogen bonding. VI. Structural and infrared spectral analysis of lithium hydroxide monohydrate and cesium and rubidium hydroxide hydrates

Abstract: From data at 25°and ionic strength 1.0 M in various media, assuming negligible temperature dependence over the range 5-20°, as has been found at zero ionic strength.16 (20) F.

Cited by 47 publications

References 41 publications

Characterization and a Fast Method for Synthesis of Sub-Micron Lithiophorite

Characterization and a Fast Method for Synthesis of Sub-Micron Lithiophorite

The Influence of Water and Protons on Li2O2Crystal Growth in Aprotic Li-O2Cells

Assignment of the vibrational spectra of lithium hydroxide monohydrate, LiOH·H2O

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The Influence of Water and Protons on Li₂O₂Crystal Growth in Aprotic Li-O₂Cells