Conductivity of aqueous suspensions of alumosilicates

Pershina, Katherine; Kokhanenko, V. V.; Maslyuk, L. N.; Kazdobin, K. A.

doi:10.3103/s1068375511050176

Cited by 6 publications

(7 citation statements)

References 5 publications

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“…The most well-known method is the construction of equivalent electrochemical circuits with the corresponding set of elements that simulate the behavior of components of the electrochemical system (electrodes, interphase interactions of the electrode and electrolyte, ion diffusion, etc.). But disputes over the interpretation of the elements of these chains, especially of the constant phase element (CPE), are continued [2][3][4][5][6]. It is well known, that a perfectly polarized electrode is an electrode without any RedOx reactions on the surface.…”

Section: Introductionmentioning

confidence: 99%

“…It is well known, that a perfectly polarized electrode is an electrode without any RedOx reactions on the surface. According to impedance theory such electrodes are modeled by the element of capacitance [3][4][5][6]. The formation of the perfectly polarized electrode is possible only on the geometrically and atomically homogeneous surfaces such as liquid mercury or single crystals (monocrystal) electrodes.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, the total impedance of the electrode is the sum of the real and complex functions of the resistive and capacitive elements formed in the volume of the solution and on the electrode/electrolyte interphase, respectively, the interfacial capacity become a frequency dependent. Assuming a certain geometry of the electrodes (porous [3][4][5] or fractal [6]), the CPE element is often use to calculate this capacity. However, according to [7] these calculations were to give inflated results which саn not be used for interpreting the actually existing relationship between roughness and the capacitance dispersion.…”

Section: Introductionmentioning

confidence: 99%

“…This gives grounds for its further use as a test parameter for the assessment of the state of art and the degree of destruction of the batteries. It is possible to use a capacitance's dispersion as a second test parameter to account for a certain electrode surface geometry for increasing the self-descriptiveness of the analysis [3][4][5]. Moreover, the using of only this testing function leads to high errors gaining, which allows it to use only for qualitative evaluation of the electrode surface [7].…”

Section: Introductionmentioning

confidence: 99%

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ASSESSMENT OF MECHANICAL DAMAGES IN THE PRIMARY Zn-MnO2 BATTERIES BY ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY

Riabokin¹,

Boichuk

Pershina

2019

Ukr. Chem. Journ.

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By current study determined dependence between changing of the average capacitance of the destroyed electrodes of chemical current sources, surface geometry and chemical composition of electrodes surface. In case of the minimum destruction of the surface of the electrode, the maximum value of the average capacity is achieved with the ratio Zn: Mn = 2: 1. The minimum capacity was been at a maximum concentration of manganese on the surface (Zn: Mn = 1: 3) and the maximum degree of destruction. That is, the destruction of the surface of the electrodes leads to a change in the ratio of Zinc and Manganese and with strong surface destruction, the number of Manganese increases significantly. The using of the second frequency-dependent parameter (capacitance dispersion) as a lumped parameter was allowed the application of the principles of electric current commutation for register the layered change in the electric characteristics of the destroyed electrodes. Due to that mathematical technique was obtained a visual picture of the quantitative and qualitative changes on the destroyed surfaces. The general view of the received diagrams repeated the contours of the SEM microphoto images of the same surfaces. There is a presence of sites with the local concentrated deviations from the total distribution of the capacitance in the specific frequency range in case of deep damage in the diagrams. Thus, these diagrams (EIS images) give a clear picture of the electrodes surface of and can be used to evaluate the type of surface damage and the degree of destruction of the electrodes of chemical current sources.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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ASSESSMENT OF MECHANICAL DAMAGES IN THE PRIMARY Zn-MnO2 BATTERIES BY ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY

Riabokin¹,

Boichuk

Pershina

2019

Ukr. Chem. Journ.

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“…In this particular case, in the presence of polarization of water molecules, the proton is transferred along a chain of hydrogen bonds by the Grotthuss relay mechanism. The presence of the independent species H 3 O + in water is also ruled out because of the formation of hydrogen bonds of neighboring molecules to it [10,12], i.e. the formation of [H + …(OH 2 ) n ], where n ≥ 2.…”

mentioning

confidence: 99%

THE FORMATION OF AN ELECTRICAL DOUBLE LAYER IN ACID AND NEUTRAL WATER SOLUTIONS ON THE 3-5 dm METALS

2021

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The rate-limiting steps of the electrolysis of water solution, taking into account hydrogen evolution overpotential were considered. A functional relationship between the electrical resistivity of 3–5 dm metals and their quantization energy of atomic electrons, as well as the coordination of metal atoms and hydrogen compounds, has been revealed. The rule of selecting effective metals for cathodes has been validated. Based on these rules, a reduction-relay mechanism of the hydrogen migration process in the electrical double layer in the electrochemical reduction of TiO2+ ions to Ti3+ and Fe3+ to Fe2+ in sulfuric acid process solutions for the production of pigment titanium dioxide was proposed. The method of the multistage electrochemical reduction of Fe3+ and [TiO2+ * nH2O] in process solutions for the production of titanium dioxide was design based on this study.

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