Density of KF–KCl–KI Melts

Худорожкова, А. О.; Исаков, А. А.; Катаев, А. А.; Redkin, Alexander; Zaikov, Yu. P.

doi:10.1134/s0036029520080078

Cited by 9 publications

(7 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A mixture of KFHF and KCl powders was placed in a glassy carbon crucible and heated with the stepwise increase in temperature (2 h at 373 K, 3 h at 573 K) for thermal decomposition of KFHF and removal of HF. Then the salts were melted and exposed at 1023 K for 2 h. Potassium iodide was purified from oxygencontaining impurities by heating a mixture of KI with an excess of crystalline iodine in the same way as in: 28 2K2O+2I2=4KI+O2↑.…”

Section: Methodsmentioning

confidence: 99%

Electrodeposition of aluminum-doped thin silicon films from a KF-KCl-KI-K2SiF6-AlF3 melt

et al. 2021

View full text Add to dashboard Cite

Cyclic voltammetry, chronoamperometry, scanning electron microscopy, atomic force microscopy, and Raman spectroscopy were used to study the regularities of silicon and aluminum co-deposition on glassy carbon from KF-KCl (2:1) - 75 mol% KI - 0.15 mol% K2SiF6 - (up to 0.15 mol%) AlF3 melts at 998 K. Cyclic voltammograms demonstrated the presence of only one cathodic peak (or nucleation loop at a low reverse potential) and the corresponding anodic peak. The cathodic peak shifted in the cathodic direction with a decrease in the concentration of aluminum ions in the melt or an increase in the scan rate. The Scharifker - Hills model was used to analyze potentiostatic current density transients and estimate the values of the apparent diffusion coefficient and the number density of nuclei. The morphology and elemental analysis of the samples obtained during potentiostatic and galvanostatic deposition for 30-60 s were studied. Continuous thin silicon films doped with aluminum were obtained under galvanostatic conditions.

show abstract

Section: Methodsmentioning

confidence: 99%

Electrodeposition of aluminum-doped thin silicon films from a KF-KCl-KI-K2SiF6-AlF3 melt

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Electrolytes for silicon electroreduction were prepared in a glassy carbon crucible from commercial chemically pure individual NaI and KI salts (Reakhim, Russia) and commercial reagent grade K2SiF6 (Reakhim, Russia), which was preliminary subjected to hydrofluoration by stepwise heating to 450 °С in the mixture with NH4F [28]. The salt mixture of (wt.%) 56NaI-44KI was purified from oxygen and other admixtures immediately prior to the experiments.…”

Section: Electrolyte Preparationmentioning

confidence: 99%

Electroreduction of silicon from the NaI–KI–K₂SiF₆ melt for lithium-ion power sources

Abdurakhimova¹,

Laptev²,

Leonova³

et al. 2022

Chim.Tech.Acta

View full text Add to dashboard Cite

Silicon and silicon-based materials are increasingly used in microelectronics, metallurgy and power generation. To date the active study aimed at the development of silicon materials to be used in devices for solar energy conversion, accumulation and storage is underway. In addition, silicon is a promising anode material for lithium-ion fuel cells. In the present paper a possibility of silicon electroreduction from the NaI–KI–K2SiF6 melt in the argon atmosphere is studied. With this aim in view the electrolysis of the NaI–KI–K2SiF6 melt with glassy carbon cathode was performed under galvanostatic and potentiostatic regimes at the temperatures ranging from 650 to 750 °С. The morphology, phase and elemental analyses of the obtained silicon deposits were performed after their separation from the electrolytes by the ICP, SEM-EDX, XRD and Raman spectroscopy methods. Fiber and thread-like silicon samples of 60 to 320 nm in dimeter with admixtures concentrations (mainly oxygen) from 1.2 to 4.6 wt.% were experimentally synthesized. The obtained samples were tested as possible Si/C composite anodes for lithium-ion power sources. The discharge capacity of such power sources after 30 cycles of lithiation-delithiation ranged from 440 to 565 mAh·g–1 and the coloumbic efficiency ranged from 89 to 91%.

show abstract

“…For the KF-KCl-KI system, the eutectic composition with mol%: 25 -KF, 34 -KCl, 41 -KI, having a melting point of 750 K was established by the method of synchronous thermal analysis. 22 The temperature dependences of the densities of melts with mol%: 45 -KF, 55 -KCl, KI and 66.6 -KF, 33.4 -KCl, KI with a KI content from 0 to 100% are described by linear functions in the temperature range of 973-1073 K. 23 An electrolyte close to ours (17% KCl, 8% KF, 75% KI) was used in the electroreduction of silicon on a copper substrate by cyclic voltammetry at 993 K. 24 A uniform distribution of the dopant (p-or n-type) was demonstrated using the co-deposition method. 25 The structure has a great influence on the physical properties of materials.…”

Section: Introductionmentioning

confidence: 99%

Computer simulation of obtaining thin films of silicon carbide

Галашев

Abramova

2023

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

show abstract

Density of KF–KCl–KI Melts

Cited by 9 publications

References 8 publications

Electrodeposition of aluminum-doped thin silicon films from a KF-KCl-KI-K2SiF6-AlF3 melt

Electrodeposition of aluminum-doped thin silicon films from a KF-KCl-KI-K2SiF6-AlF3 melt

Electroreduction of silicon from the NaI–KI–K₂SiF₆ melt for lithium-ion power sources

Computer simulation of obtaining thin films of silicon carbide

Contact Info

Product

Resources

About

Density of KF–KCl–KI Melts

Cited by 9 publications

References 8 publications

Electrodeposition of aluminum-doped thin silicon films from a KF-KCl-KI-K2SiF6-AlF3 melt

Electrodeposition of aluminum-doped thin silicon films from a KF-KCl-KI-K2SiF6-AlF3 melt

Electroreduction of silicon from the NaI–KI–K2SiF6 melt for lithium-ion power sources

Computer simulation of obtaining thin films of silicon carbide

Contact Info

Product

Resources

About

Electroreduction of silicon from the NaI–KI–K₂SiF₆ melt for lithium-ion power sources