Conductivity in sodium-yttrium-silicate and sodium-yttrium-phosphate glass

Nechaev, G. V.; Vlasova, S. G.; Резницких, О. Г.

doi:10.1134/s1087659615010174

Cited by 8 publications

(4 citation statements)

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“…The crystallisation kinetics and ionic conductivity of yttrium phosphate glasses have been reported [41][42][43][44]. Petra et al studied crystallisation kinetics of erbiumdoped yttrium phosphate glasses for scintillation applications [45] by exploring the effect of particle sizes in both powder and bulk samples.…”

Section: Introductionmentioning

confidence: 99%

Yttrium doped phosphate-based glasses: structural and degradation analyses

et al. 2020

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This study investigates the role of yttrium in phosphate-based glasses in the system 45(P2O5)–25(CaO)– (30-x)(Na2O)–x(Y2O3) (0≤x≤5) prepared via melt quenching and focuses on their structural characterisation and degradation properties. The structural analyses were performed using a combination of solid-state nuclear magnetic resonance (NMR), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). 31P NMR analysis showed that depolymerisation of the phosphate network occurred which increased with Y2O3 content as metaphosphate units (Q2) decreased with subsequent increase in pyrophosphate species (Q1). The NMR results correlated well with structural changes observed via FTIR and XPS analyses. XRD analysis of crystallised glass samples revealed the presence of calcium pyrophosphate (Ca2P2O7) and sodium metaphosphate (NaPO3) phases for all the glass formulations explored. Yttrium-containing phases were found for the formulations containing 3 and 5 mol% Y2O3. Degradation analyses performed in Phosphate buffer saline (PBS) and Milli-Q water revealed significantly reduced rates with addition of Y2O3 content. This decrease was attributed to the formation of Y-O-P bonds where the octahedral structure of yttrium (YO6) cross-linked phosphate chains, subsequently leading to an increase in chemical durability of the glasses. The ion release studies also showed good correlation with the degradation profiles.

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Section: Introductionmentioning

confidence: 99%

Yttrium doped phosphate-based glasses: structural and degradation analyses

et al. 2020

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“…Homogenized powders were heated at 900°C in a platinum crucible for 1 h to decompose the phosphorus precursor (NH 4 H 2 PO 4 ) and eliminate water and CO 2 . NRPS glasses were melted at 1350°C for 1 h, whereas NRS, N5ScS, and N5InS glasses were melted at 1500°C for 3 h 7,21 . All precursor glasses were annealed at 500°C for 3 h to relieve thermal stress.…”

Section: Methodsmentioning

confidence: 99%

“…Homogenized powders were heated at 900 • C in a platinum crucible for 1 h to decompose the phosphorus precursor (NH 4 H 2 PO 4 ) and eliminate water and CO 2 . NRPS glasses were melted at 1350 • C for 1 h, whereas NRS, N5ScS, and N5InS glasses were melted at 1500 • C for 3 h. 7,21 All precursor glasses were annealed at 500 • C for 3 h to relieve thermal stress. Synthesized glasses were characterized by the DSC (Netzsch DSC 404) analysis with a heating rate of 10 • C/min to determine the glass transition (T g ) and crystallization peak (T p ) temperatures (Figure 1 and Table 1).…”

Section: Sample Preparation and Characterizationmentioning

confidence: 99%

Solid‐state NMR investigation of fast sodium ion‐conducting glass–ceramics: The system Na₃₊₃_x₋_yRE₁₋_xP_ySi₃₋_yO₉ (RE = Sc, Y)

2022

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Glasses and glass-ceramics of composition Na 3+3x−y RE 1−x P y Si 3−y O 9 were synthesized using RE = Sc and Y, x = 0.4, and y = 0.0 and 0.3 to obtain multiple-phase glass-ceramics containing the highly conducting Na 5 RESi 4 O 12 (N5) phase. In addition, the two model compounds Na 5 ScSi 4 O 12 and Na 5 InSi 4 O 12 were synthesized. Samples were characterized at two distinct annealing stages using X-ray powder diffraction, electrical conductivity measurements, and multinuclear solid-state magic angle spinning (MAS) nuclear magnetic resonance (NMR) spectroscopy. The N5 phase is dominantly formed for Sc-containing glass-ceramics (both with y = 0.0 and 0.3) at crystallization temperatures above 900 • C. For the other glass-ceramics, the crystallized phases were dominantly Na 3 RESi 2 O 7 (N3), RE = Sc and Y, and Na 9 YSi 6 O 18 (N9) phases. 29 Si MAS-NMR peak assignments were done with the aid of 29 Si{ 45 Sc} rotational echo adiabatic passage double resonance (REAPDOR) experiments. 29 Si and 23 Na MAS-NMR spectra reveal complex phase compositions and local environment distributions, which could be largely assigned based on known semiempirical chemical shift correlations with average Si-O and Na-O bond distances. 31 P MAS and 31 P{ 45 Sc} REAPDOR NMR results suggest the presence of orthophosphate groups, arguing against the literature model of isostructural substitution of silicon by phosphorus in the N5 phase.

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“…[73] Table 2 includes the synthesis method and conductivity of some more silicates developed. [53,54,60,[62][63][64][65][66][73][74][75]79,81,82,[98][99][100][101][113][114][115][116][117][118][119][120][121][122][123][124] High-ionic conductivity at RT is achieved by the silicate doped with phosphorous, Na 5.2 Y 0.8 P 0.4 Si 3.6 O 12.0 . [98] 4.2.…”

Section: Techniquementioning

confidence: 99%

Progress in Sodium Silicates for All‐Solid‐State Sodium Batteries—a Review

2023

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All solid‐state sodium batteries (ASSSBs) are considered a promising alternative to lithium‐ion batteries due to increased safety in employing solid‐state components and the widespread availability and low cost of sodium. As one of the indispensable components in the battery system, organic liquid electrolytes are the currently used electrolytes due to their high‐ionic conductivity (10−2 S cm−1) and good wettability; however, their low‐thermal stability, flammability, and leakage tendency pose safety concerns. The growing sodium‐ion battery technology with solid electrolytes is a viable solution due to their improved safety. However, solid electrolytes suffer from insufficient ionic conductivity at room temperature (10−4–10−3 S cm−1), poor interface stability, high charge‐transfer resistance, and low wettability, yielding inferior battery performance. Sodium rare‐earth silicates are a new class of materials with a 3D structure framework similar to sodium‐superionic conductors (NASICONs). These silicates can be used as a solid electrolyte for solid‐state sodium batteries due to their high‐ionic conduction (10−3 S cm−1) at 25 °C. Herein, the sodium rare‐earth silicate synthesis, crystal structure, ion‐conduction mechanism, doping, and electrochemical properties are discussed. This emerging type of inorganic solid electrolyte can pave the way to building next‐generation ASSSBs.

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Conductivity in sodium-yttrium-silicate and sodium-yttrium-phosphate glass

Cited by 8 publications

References 4 publications

Yttrium doped phosphate-based glasses: structural and degradation analyses

Yttrium doped phosphate-based glasses: structural and degradation analyses

Solid‐state NMR investigation of fast sodium ion‐conducting glass–ceramics: The system Na₃₊₃_x₋_yRE₁₋_xP_ySi₃₋_yO₉ (RE = Sc, Y)

Progress in Sodium Silicates for All‐Solid‐State Sodium Batteries—a Review

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Conductivity in sodium-yttrium-silicate and sodium-yttrium-phosphate glass

Cited by 8 publications

References 4 publications

Yttrium doped phosphate-based glasses: structural and degradation analyses

Yttrium doped phosphate-based glasses: structural and degradation analyses

Solid‐state NMR investigation of fast sodium ion‐conducting glass–ceramics: The system Na3+3x−yRE1−xPySi3−yO9 (RE = Sc, Y)

Progress in Sodium Silicates for All‐Solid‐State Sodium Batteries—a Review

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Solid‐state NMR investigation of fast sodium ion‐conducting glass–ceramics: The system Na₃₊₃_x₋_yRE₁₋_xP_ySi₃₋_yO₉ (RE = Sc, Y)