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Information × Registration Number 0221U103622, 0119U001824 , R & D reports Title Highly effective functional materials for modern electrochemical devices popup.stage_title Head Pohorenko Yuliia V., Registration Date 23-02-2021 Organization Institute of General and Inorganic Chemistry. VI Vernadsky National Academy of Sciences of Ukraine popup.description2  The films of BiVO4, BiVO4/WO3 and Cu3VO4 were obtained by electrochemical method with the interferometric control of film thickness. It was found that BiVO4 films with a thickness of 80-150 nm showed higher values of the quantum yield of photocurrent compared to films with a thickness of 0.5-1 μm. It is determined that the WO3 layer in the BiVO4/WO3 heterostructure increases its overall photoelectrochemical efficiency in the ultraviolet and near visible regions of the spectrum. It was found that, depending on the heat treatment conditions, the band gap of the obtained Cu3VO4 films is from 1.4 to 2.2 eV, which allows to use them as photoanodes for photoelectrochemical decomposition of water and release of oxygen and hydrogen. It has been established that it replaces parts of lead cations (up to 20 mol%) in the composition of the fluoride-conducting phase Pb0,86Sn1,14F4. It helps to increase its responsibility in its temperature range. The samples Pb0.69Nd0.17Sn1.14F4.17 (σ373 = 3.68 • 10-2 cm / cm), Pb0.76Sm0.10Sn1.14F4.10 and Pb0.73Sm0.13Sn1.14F4, respectively, have the highest conductivity and the lowest activation energy. , 13 (σ500 = 0.038 and 0.046 Cm / cm, respectively), K0.03Pb0.83Sn1.14F3.97 (σ600 = 0.38 Cm / cm, σ330 = 0.01 Cm / cm), Rb0.2Pb0.63Sn1.14F3 , 8 (σ573 = 0.34-0.41 Cm / cm, Ea = 0.16 eV and σ373 = (5.34–8.16) • 10-2 Cm / cm, Ea = 0.48–0, 51 eV respectively). The results of testing the cathode composition (LiFePO4 / C) with a carbon content of ~ 10% synthesized in ChCl-EG medium, using an electrolyte according to a 0.6 M solution of LiVOV in an equimolar mixture of EC-DMC, showed that the value of the content translated into content of pure LiFePO4 in the cathode mass is about 100 mAh / g at a current of 0.1 C. Using the "coin cell" cells for the material synthesized in ChCl-TEG, using an electrolyte of 1M solution of LiPF6 in a mixture of EC: DMS (1: 1) is the value of the material for another cycle of about 130 mAh. Product Description popup.authors Galaguz Vadym А. Pohorenko Yuliia V. Smilyk Vitaliy O. popup.nrat_date 2021-02-23 Close