Intensification of the ion transport in an aluminum chloride electrolyte

Shabanov, O. M.; Kazieva, L. A.; Kachaev, R. T.; Magomedova, A. O.; Suleimanov, S. I.

doi:10.1134/s0036029515080169

Cited by 4 publications

(3 citation statements)

References 5 publications

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“…The activation degree of conductivity also rises with increasing number of pulses and their voltage amplitude, and tends to the saturation. In Figure 7, as examples, these dependences are presented for a magnesium electrolyte Similar results were obtained for other compositions of molten mixtures [7][8][9][10][11][12][13][14][15]. The results obtained in Sections 3.1 and 3.3 are collected in Table 1.…”

Section: Intensification Of Conductivity Of Molten Metal Chloride Electrolytessupporting

confidence: 72%

Structural Relaxation in the Activated Molten Chloride Electrolytes of Polyvalent Metals

2017

International Journal of Mining Science

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The molten salt electrolytes from which the polyvalent active metals are extracted are strongly structured at unusually long distances that increase the energy consumption of the electrowinning cell. Under influence of strong electrical pulses they are transferred to a non-equilibrium state with modification of the structure and intensification of electrochemical properties. The observed regularities in the electrolytes activation are due to stimulated dissociation of complex ions on the simpler and more mobile complex and elementary ions. This is confirmed by the disappearance of characteristic Raman peaks when the melts are activated. During the relaxation process in non-equilibrium melts their electrochemical parameters and Raman peaks are seeking to recover their equilibrium values and pattern. All the observed patterns of the duration and the dynamics of the relaxation in non-equilibrium melts show that we definitely have deal with the structural relaxation in ionic.

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Section: Intensification Of Conductivity Of Molten Metal Chloride Electrolytessupporting

confidence: 72%

Structural Relaxation in the Activated Molten Chloride Electrolytes of Polyvalent Metals

2017

International Journal of Mining Science

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“…In another cell Ag/RbAg 4 I 5 /Ag x HfSe 2 /RbAg 4 I 5 /Ag composite electrodes blocking electron transfer (cell 2) were used. The RbAg 4 I 5 compound used for this purpose is one of the best ionic conductors, the conductivity of which, even at room temperature, is carried out exclusively by silver ions [2][3][4]. The test specimens were made as discs of the diameter of 10 mm and the thickness of 2 mm.…”

Section: Experimental Partmentioning

confidence: 99%

“…High ionic mobility in binary halides and chalcogenides of copper and silver is well known [1,2]. In addition, many ternary compounds, such as Ag 3 SI, RbAg 4 I 5 , also belong to materials with high ionic conductivity [2][3][4]. The main factor leading to the high mobility of ions is the disorder in the atomic structure of such compounds, when there are enough of positions equivalent in energy for the mobile ion.…”

Section: Introductionmentioning

confidence: 99%

Nature of electrotransport and mechanisms of relaxation in an alternating field in silver intercalated hafnium diselenide

V.G.

2022

Physics of the Solid State

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The features of charge transfer in electrochemical cells with electrodes of various types and with an intercalated compound AgxHfSe2 (x=0.1,0.2) as an electrolyte were studied by the method of impedance spectroscopy. Based on the analysis of the obtained data, the presence of mixed electron-ionic conductivity in this compound was shown, and the numbers of ionic and electron transfer in these compounds were determined for the first time. The different nature of relaxation processes in mixed and ionic charge transfer is shown. Keywords: hafnium diselenide, silver, intercalation, impedance, ionic and electronic conductivity.

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Intensification of electrochemical properties of the molten chloride electrolytes of the cerium subgroup lanthanides

Shabanov

Suleymanov

Magomedova

2017

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. The electrical conductivity of molten chloride electrolytes of the cerium subgroup lanthanides increases with rising electric field strength and strive to achieve the limiting high voltage values (Wien effect). On exposure of the high-voltage microsecond pulsed fields, the melts are transited into a prolonged non-equilibrium state with increased electrical conductivity and electrolyze current density. During the relaxation processes in non-equilibrium melts, increased electrical conductivity tends to restore the values that are specific to equilibrium systems. IntroductionIn various modern industries there is an increasingly widespread use of rare earth metals (REM). In an industrial scale mainly REM alloys and relatively pure lanthanum, cerium and neodymium are produced. REM and their alloys are advantageously prepared by electrolysis of anhydrous molten chloride mixtures Ln-MCl (Ln = REM and M = Na, K). The structures of the molten electrolytes, as well as the nature and distribution their structural species, determine their observed physicochemical properties, the mechanisms and kinetic pathways that decrease energetic efficiency of metals production technologies [1]. For better understanding the structure of equilibrium molten electrolytes and improving the chemical and electrochemical technologies, their properties should be studied in a non-equilibrium state, which can be achieved by various external influences, for example, by the action of strong electric pulses [2]. We have found that electrical conductivity of molten alkaline-earth chlorides and their mixtures with alkaline chlorides increase with increasing external electric field strength (EFS) and strive to achieve the limiting high-voltage values in the fields of the order of 1 MV/m [3], in the same way as in the Wien effect in the aqueous electrolyte solutions.After the high-voltage pulsed discharges in the electrolytes having been completed, their low voltage conductivity (measured by usual AC Bridge) turns out to be increased [4] i.e., in them the phenomenon of activation (the "memory effect") is observed. The activation degree of electrical conductivity reaches up to 20 % in the case of individual alkali earth metals chlorides and to 55 % in the case of their mixtures with potassium chloride. These observations were interpreted as a consequence of the stimulated dissociation of complex formations. The activation of the melts is followed by the recombination of complex ions during prolonged relaxation processes in the nonequilibrium melts.

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Intensification of the ion transport in an aluminum chloride electrolyte

Cited by 4 publications

References 5 publications

Structural Relaxation in the Activated Molten Chloride Electrolytes of Polyvalent Metals

Structural Relaxation in the Activated Molten Chloride Electrolytes of Polyvalent Metals

Nature of electrotransport and mechanisms of relaxation in an alternating field in silver intercalated hafnium diselenide

Intensification of electrochemical properties of the molten chloride electrolytes of the cerium subgroup lanthanides

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