Fluoride ion conductivity of solid solutions KxPb0.86-xSn1.14F4-x

Pohorenko, Yuliia; Pshenychnyi, Roman; Pavlenko, Tamara; Омельчук, А. А.; Trachevskyi, V.V.

doi:10.2298/jsc201124031p

Cited by 3 publications

(1 citation statement)

References 32 publications

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“…The X-ray diffraction method established that in the system PbF 2 -SnF 2 at a ratio of the initial components of 43 mol.% PbF 2 and 57 mol.% SnF 2 forms a single-phase solid solution with the structure β-PbSnF 4 , the formula of which can be represented as Pb 0.86 Sn 1.14 F 4 . 32 The electrical conductivity of this phase at T ~390 K is an order of magnitude higher compared to β-PbSnF 4 (σ 373 = 2.9 and σ 373 = 0.902 mS cm -1 , respectively). Therefore, in order to search for new substances with improved fluoride-ionic conductivity characteristics, a number of new fluoride-conducting phases based on Pb 0.86 Sn 1.14 F 4 compound with β-PbSnF 4 structure with fluorides of metals of different oxidation states (M = Li, Na, K, Rb, Ba, Y, Nd, Sm).…”

Section: Accepted Manuscriptmentioning

confidence: 89%

Highly efficient functional materials for modern electrochemical devices

Smilyk

Voloshanovska

Galaguz

et al. 2023

JSCS

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In order to find new functional materials and materials with improved performance for next-generation electrochemical devices, several new materials for various purposes have been synthesized. In particular, BiVO4 films were obtained by electrochemical synthesis using interferometric control of film thickness during their deposition. Previously, it was found that the use of thin BiVO4 films with a thickness of 150 to 400 nm is most effective, where was observed an increase in the quantum yield of photocurrent up to 0.25 at ? = 400 to 450 nm. LiFePO4 was synthesized in DES medium (low-temperature eutectic solvents): choline chloride-triethylene glycol (ChCl-TEG) and choline chlorideethylene glycol (ChCl-EG) using NH4FePO4 and CH3COOLi as precursors. It was found that the mode of synthesis of LiFePO4/C at 973 ? for 1 h does not lead to oxidation of LiFePO4, as evidenced by the values of the ratio Fe2+/Fe3+ for LiFePO4 and LiFePO4/C, which are 2.4 and 2.7, respectively. It was found that the substitution of part of lead cations (up to 20 mol.%) in the composition of the fluorideconducting phase Pb0.86Sn1.14F4 contributes to the increase of its conductivity in the whole temperature range, and to a greater extent, the higher the concentration of the substituent. Charge transfer is provided by highly mobile interstitial fluorine anions, the concentration of which increases with increasing temperature and substituent content.

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Section: Accepted Manuscriptmentioning

confidence: 89%

Highly efficient functional materials for modern electrochemical devices

Smilyk

Voloshanovska

Galaguz

et al. 2023

JSCS

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Recent progress, challenges and prospects of electrolytes for fluoride-ion batteries

Zhang,

Cao,

Hao

et al. 2024

Energy Reviews

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Scientific Electrochemical School of Kyiv

Pekhnyo¹,

Омельчук

Linyucheva³

2022

Ukr. Chem. Journ.

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An overview dedicates to the directions of scientific research and achieved results in the field of electrochemistry, initiated by scientific institutions and in higher educational institutions of Kyiv. Academician O.V. Plotnikov is the forerunner of the world- known Kyiv School of Electrochemistry, formed in the last century's twenties: M.I. Usanovych, V.O. Izbekov, Ya.A. Fialkov, Yu.K. Delimarskyi, I.A. Sheka, and many other scientists known to the general scientific community. O.V. Plotnikov and his followers are one of the first to attempt to combine the most progressive theoretical provisions on electrolytic dissociation, the chemical theory of solutions, and the chemistry of complex compounds for that time. World achievements of the Kyiv School of Electrochemistry were provided by the results of such fundamental research as the chemical theory of solutions, acid-base interactions (Usanovich's theory), the structure of the electric double layer (the Yesin-Markov effect, the reduced Antropov scale of potentials), physical chemistry and electrochemistry of molten electrolytes, kinetics electrode processes, electrometallurgy, electrochemical materials science, electrochemical power engineering. Representatives of our School significantly expanded the knowledge of mass transfer in electrochemical systems with molten electrolytes (the phenomenon of the transfer of metals from the anode to the cathode). New technological processes of obtaining and refining heavy non-ferrous metals (bismuth, lead, indium, etc.), finishing metal surfaces, extraction of radionuclides, electroplating technology, and environmental monitoring have been introduced into the practice of industrial production. Research in electrochemical materials science is closely connected to solving the problems of electrochemical energy, particularly, the creation of new sources of current, including solid-state, hydrogen generators, and converters of solar energy into electrical power. The studies of electrochemical aspects of the extraction of some refractory metals from natural raw materials, the creation of new materials with specified functional properties, catalysts, and electrocatalysts, the latest galvanic coatings, electrode and electrolyte materials for chemical current sources and supercapacitors, valuable inorganic compounds, metal and carbon nanophases, corrosion inhibitors are expanding the scientific direction of electrochemical materials science.

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Fluoride ion conductivity of solid solutions KxPb0.86-xSn1.14F4-x

Cited by 3 publications

References 32 publications

Highly efficient functional materials for modern electrochemical devices

Highly efficient functional materials for modern electrochemical devices

Recent progress, challenges and prospects of electrolytes for fluoride-ion batteries

Scientific Electrochemical School of Kyiv

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