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| Modulácia fázových prechodov elektrokeramiky s vysokou hustotou energie | |
| Controlling phase transitions in energy-storage electroceramics | |
| Program: | VEGA |
| Project leader: | RNDr. Kovaľ Vladimír, DrSc. |
| Annotation: | The main purpose of the project is to investigate phase transition behavior and control the temperatures of Curiepoints and electric field-induced transformations in advanced energy-storage ceramics, to identify mechanisms ofstabilization of anti-ferroelectric phase and their relationship to energy storage properties (energy density andefficiency). As experimental materials, NaNbO3 (NN) will be used as the parental compound, which will bechemically modified by aliovalent cations, such as La, Li and Sr. In addition, solid solutions of NN with otherperovskites, such as BiFeO3 and Bi0.5Na0.5TiO3 will be synthesized by solid-state reaction. The structureevolution of ceramics will be characterized by X-ray diffraction and electron microscopy. For each NN-basedsystem and composition, the dielectric, ferroelectric and energy-storage properties will be investigated.Consequently, mechanisms leading to slim and/or double hysteresis loops with high maximum and smallremanent polarizations will be identified. |
| Duration: | 1.1.2026 – 31.12.2029 |
| MERCURY – Mechanochemický výskum chalkogenidov pre využitie v obnoviteľnej energii | |
| Mechanochemical research of chalcogenides for utilization in renewable energy | |
| Program: | SRDA |
| Project leader: | Ing. Bureš Radovan, CSc. |
| Annotation: | This project aims to advance the field of materials science through the mechanochemical synthesis of metal chalcogenides, focusing on innovative methodologies and devices to enhance the efficiency and understanding of mechanically induced self-propagating reactions (MSRs). The first objective involves the mechanical activation of metals and chalcogens to produce fine, flaky, or delaminated precursors, which are crucial for optimizing the surface area and reactivity of starting materials. To complement this, we will develop a transferable device capable of monitoring pressure and temperature during planetary milling with subsecond resolution, providing valuable insights into the milling process and allowing for precise control over reaction conditions. Our investigation will also explore how the properties of selected reagents and milling conditions influence the ignition time of MSRs, aiming to elucidate the conditions that favor the formation of binary and ternary metal chalcogenides (MxCy, where M = Ag, Cu, Co, In, Ni and C = S, Se). Furthermore, we seek to identify the primary driving forces behind ball-free MSRs for selected metal chalcogenides, which will be critical for predicting reaction outcomes and improving synthesis strategies. Finally, we will explore the application potential of the synthesized products in electrocatalysis, particularly for hydrogen evolution reactions (HER). Through these interconnected objectives, this project aspires not only to produce novel materials but also to contribute to a deeper understanding of mechanochemical |
| Duration: | 1.9.2025 – 31.8.2029 |
| Vývoj vysokoúčinných katalyzátorov pre elektrochemickú výrobu vodíka | |
| Development of highly efficient catalysts for the electrochemical production of hydrogen | |
| Program: | VEGA |
| Project leader: | RNDr. Gubóová Alexandra, PhD. |
| Annotation: | The goal of the presented project is the development of highly efficient catalysts based on transition metals,primarily in the form of high-entropy alloys and phosphides for the electrochemical production of hydrogen. Thecatalyst development process will be made more efficient with the help of computer simulations, which will enablethe calculation of theoretical parameters, the identification of active sites and the analysis of the mechanisms ofhydrogen evolution and oxygen evolution reactions for the rational design of electrocatalysts. The fulfillment of the set goals of the project will contribute to the expansion of important knowledge in the field of hydrogentechnologies, but above all it will lead to the efficient production of hydrogen as a potential fuel of the future.Efficient hydrogen production will help to successfully integrate hydrogen infrastructure according to theEuropean "Smart cities" model, which will support the overall improvement of the environment globally. |
| Duration: | 1.1.2025 – 31.12.2027 |