Work number - M 35 AWARDED
Presented Ivan Franko National University of Lviv
1. SHCHEPANSKYI Pavlo – Candidate of Physical and Mathematical Sciences, Associate Professor of Ivan Franko National University of Lviv
2. KORDAN Vasyl – Candidate of Chemical Sciences, Research Fellow of Ivan Franko National University of Lviv
3. RUDYSH Myron – Candidate of Physical and Mathematical Sciences, Senior Research Fellow of Ivan Franko National University of Lviv
4. HORIACHA Myroslava – Candidate of Chemical Sciences, Junior Research Fellow of Ivan Franko National University of Lviv
The work is dedicated to the studies of the crystals and solid solutions, which can serve as a basis for novel functional materials. The influence of doping agents on the electrochemical and magnetic properties of materials has been investigated comprehensively. Based on complex electrochemical studies, a two-stage mechanism of lithium and magnesium intercalation into a matrix of phase with Mn5Si3-type structure was proposed. The impact of doping the binary intermetallic Tb2Ni17with Li and Mg components on the improvement of the corrosion resistance and hydrogen sorption capacity of the electrodes was determined.
Crystal chemical analysis of phases was performed; the data on the peculiarities of the structure types were systematized; the stability ranges for solid solutionsand influence of doping agents on the size of homogeneity regions were determined, providing the basis for predicting and tuning the properties. The systematized and summarized results contribute to controlled synthesis of new materials with desired properties. Compositions of solid solutions for the development of electrode and magnetic materials are recommended.
The complex experimental and theoretical study of inorganic functional materials of A2BX4 group with a wide range of properties aiming at elucidating the influence of structural transformations (complete and partial cation substitution, impurities and structural phase transitions) in a selected group of crystals on their optical and electronic properties is carried out. The possibility of controlling the fundamental optical characteristics of A2BX4 crystals (parameters of optical anisotropy, refractive indices, birefringence, elastic-optical coefficients, acousto-optical interaction coefficients, band gap) is shown. The practical application of the studied materials as active elements in functional electronics devices is proposed.
Number of publications: 53 papers (including 24 in Scopus and WoS journals), 78 conference abstracts. The total number of references to the authors' publications/ h-index of work, according to the databases is respectively: Web of Science – 83/5, Scopus – 107/6, Google Scholar – 229/9. 3 patents for utility models are obtained.