Highly efficient functional materials for modern electrochemical devices Scientific paper

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Vitaliy Smilyk
Yuliia Voloshanovska
Vadym Galaguz
Oleksandr Ivanenko
Olha Medvezhynska


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 λ = 400 to 450 nm. LiFePO4 was synthesized in DES medium (low-temperature eutectic solvents): choline chloride-triethylene glycol (ChCl-TEG) and choline chloride-ethylene glycol (ChCl-EG) using NH4FePO4 and CH3COOLi as precursors. It was found that the mode of synthesis of LiFePO4/C at 973 К 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 fluoride-conducting 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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V. Smilyk, Y. . Voloshanovska, V. . Galaguz, O. . Ivanenko, and O. . Medvezhynska, “Highly efficient functional materials for modern electrochemical devices: Scientific paper”, J. Serb. Chem. Soc., Nov. 2022.


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