Hydrogen diffusion and ortho–para conversion in absorption and Raman spectra of germanosilicate optical fibers hydrogen-loaded at 150–170MPa

Плотниченко, В. Г.; Vasiliev, S.A.; Рыбалтовский, А. О.; Колташев, В. В.; Sokolov, V. O.; Klyamkin, S. N.; Medvedkov, O.I.; Rybaltovskii, A. A.; Malosiev, A.R.; Dianov, E. M.

doi:10.1016/j.jnoncrysol.2005.10.004

Cited by 10 publications

(2 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The peaks at 357, 590, 815, 1036, and 4160 cm −1 are due to hydrogen gas (H 2 ). 13,14 The 357, 590, 815 and 1036 cm −1 bands are due to H 2 rotation and the single band near 4160 cm −1 is due to H 2 stretching. H 2 evolution from the electrochemical reduction of water in the electrolyte has also been identified using DEMS.…”

Section: Resultsmentioning

confidence: 99%

Potential Dependence of Gas Evolution in 18650 Cylindrical Lithium-Ion Batteries Using In-Situ Raman Spectroscopy

Gerelt-Od¹,

Kim²,

Lee³

et al. 2018

J. Electrochem. Soc.

View full text Add to dashboard Cite

A long-term in-situ measurement method for evolved gases in commercial 18650 cylindrical lithium ion batteries (LIBs) is proposed using Raman spectroscopy. Hydrogen, methane, carbon dioxide, and carbon monoxide were the main gases detected from cells at 4.2-4.8 V for 1800 h. Gas evolution rates were determined by the aging time and the staying potential, resulting in a nonlinear partial-pressure-dependence as a function of the aging time. Initially, the evolution of carbon dioxide and carbon monoxide was significant. After potential-dependent onset times, hydrogen and methane generation increased suddenly. At low potential ranges of 4.2-4.4 V, mostly hydrogen gas was generated, whereas at high potential ranges (>4.6 V), methane becames dominant. Even at 4.4 V, importantly, the absolute accumulative H 2 gas pressure was >3 atm, raising the requirement to monitor such gas for better safety even under nominal operating conditions. Moreover, cumulative partial pressures of the detected gases exceeded the range 5-10 atm, which was associated with the staying potential. An evolution mechanism through which the gas is converted from hydrogen to methane is proposed and discussed. The electrochemical analysis of the aged LIBs showed that the capacity fade was accelerated by the increase in the staying potential while the resistances remained similar.

show abstract

Section: Resultsmentioning

confidence: 99%

Potential Dependence of Gas Evolution in 18650 Cylindrical Lithium-Ion Batteries Using In-Situ Raman Spectroscopy

Gerelt-Od¹,

Kim²,

Lee³

et al. 2018

J. Electrochem. Soc.

View full text Add to dashboard Cite

show abstract

“…Gratings written in hydrogen-loaded fibers are less stable at low temperature than those written in unloaded ones [2,[4][5][6]; however, post-exposure to a uniform UV-beam could improve the index modulation and thermal stability of gratings written in hydrogenloaded fibers [3,[7][8]. It has been reported that various hydrogen-related centers such as Si-OH, Ge-OH, Ge-H2, Ge-H, water, and germyl radicals are generated by UV-irradiation, heating, or -ray irradiation in hydrogen-loaded germanium doped silica fibers [9][10][11]. To investigate hydrogen-related defects, experiments with various spectroscopy types such as infrared [4,12], Raman [5,[13][14], luminescence [6,15] and ESR spectroscopy [7,[17][18] have been carried out on hydrogen-loaded performs or fibers.…”

Section: Introductionmentioning

confidence: 99%

Hydroxyl Properties of Hydrogenated Germanosilicate Optical Fiber Due to Thermal Treatment and Ultraviolet Irradiation

Kuswanto¹,

Hermanto²,

Goutaland³

et al. 2017

J.Nano- Electron. Phys.

View full text Add to dashboard Cite

The aim of the research was to examine the formation and destruction of the hydroxyl in optical fibers by comparing the ambient atmosphere, air, and nitrogen during thermal treatment from room temperature up to 1100 °C. It has been shown that during the heat treatment, molecular hydrogen dissolved in the fiber plays no role in the formation of OH while under UV irradiation the formation is dependent on the presence of dissolved hydrogen. The heat treatment preferentially leads to the formation of Si-OH, while during irradiation it assists the formation of both Ge-OH and Si-OH.

show abstract

Analysis of the performance of interferometry, surface plasmon resonance and luminescence as biosensors and chemosensors

Ince

Narayanaswamy

2006

Analytica Chimica Acta

119

View full text Add to dashboard Cite

Hydrogen diffusion and ortho–para conversion in absorption and Raman spectra of germanosilicate optical fibers hydrogen-loaded at 150–170MPa

Cited by 10 publications

References 23 publications

Potential Dependence of Gas Evolution in 18650 Cylindrical Lithium-Ion Batteries Using In-Situ Raman Spectroscopy

Potential Dependence of Gas Evolution in 18650 Cylindrical Lithium-Ion Batteries Using In-Situ Raman Spectroscopy

Hydroxyl Properties of Hydrogenated Germanosilicate Optical Fiber Due to Thermal Treatment and Ultraviolet Irradiation

Analysis of the performance of interferometry, surface plasmon resonance and luminescence as biosensors and chemosensors

Contact Info

Product

Resources

About