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Mechanochemical synthesis of additives for cathode material of lithium-ion traction batteries

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Category: Electrical ­Complexes and ­Systems

Last Updated on 07 January 2019

Published on 26 December 2018

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Authors:

O.Svietkina, Dr. Sc. (Tech.), Assoc. Prof., orcid.org/0000-0003-0857-8037, National Mining University, Dnipro, Ukraine, е-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.; This email address is being protected from spambots. You need JavaScript enabled to view it.; This email address is being protected from spambots. You need JavaScript enabled to view it.

V.Protsiv, Dr. Sc. (Tech.), Prof., orcid.org/0000-0002-2269-4993, National Mining University, Dnipro, Ukraine, е-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.; This email address is being protected from spambots. You need JavaScript enabled to view it.; This email address is being protected from spambots. You need JavaScript enabled to view it.

O.Bohdanov, Cand. Sc. (Tech.), Assoc. Prof., orcid.org/0000-0003-4790-2338, National Mining University, Dnipro, Ukraine, е-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.; This email address is being protected from spambots. You need JavaScript enabled to view it.; This email address is being protected from spambots. You need JavaScript enabled to view it.

K.Bas, Cand. Sc. (Tech.), Assoc. Prof., orcid.org/0000-0003-2918-3501, National Mining University, Dnipro, Ukraine, е-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.; This email address is being protected from spambots. You need JavaScript enabled to view it.; This email address is being protected from spambots. You need JavaScript enabled to view it., National Transport University, Kyiv, Ukraine, е‑mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Abstract:

Purpose.To study the effect ofmechanical activationon TiO₂–SiO₂–Al₂O₃ system (in the form of minerals) to apply them as cathode material additives.

Methodology. Mechanochemical activation(MA) of materials was performed by means of a vertical vibration mill (VVM). Average size of the powdered particles was determined according to the data obtained with the help of laser analyzer SK LAZER MICRON SIZER PRO-700 (Japan). Formation of the activated state is closely connected with energy characteristics of the material. In this context, multipurpose technique to research energy characteristics of the materials was used; the technique involves potentiometric measurements within suspensions with indifferent electrode. “In situ” diffractograms were obtained using X-ray diffractometer ДРОН-2 (Burevestnik, Russia). Phase analysis of the materials was determined with the help of X-ray diffractometer ДРОН-3 (Burevestnik, Russia): Fe Kaemission, high voltage 35 eV, and anode current 20 mA. Physical and chemical processes, taking place in the process of GH (Gas Hydrate) methane, were analyzed with the help of differential thermal analysis (DTA) and X-ray fluorescence analysis (RFA). A content of gaseous products was studied by means of a gas adsorption chromatography method using “LXM-2000-TM”chromatograph (Elektra, Russia).

Findings. Physical and chemical properties of the systems usingTiO₂–SiO₂–Al₂O₃–PEin the form of minerals after their mechanochemical activation have been analyzed. It has been determined that after their activation within VVM, the additives intensify electronic conductivity owing to the formation of solid solutions in the process of the activation, on the one hand, and, on the other hand, owing to changes in crystal-chemical composition. It has been demonstrated that the activated minerals intensify electronic conductivity up to 10^-2 Ohm^-1сm^-1.

Originality. It isin the fact thatvibroimpulse activationinvolveschanges in electric conductivity of minerals (in particular, rutile and oxidized quartzites) depending upon the formation of solid solutions or chemical compounds resulted from mechanochemical activation.

Practical value.A technique to intensify additives for cathode material of lithium-ion accumulators, where electronic conductivity grows, has been developed.

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