Scope of research
The laboratory researches are focused on the study of materials for clean energy conversion and storage. The scientific program is developing in several directions:
- Design of intercalation compounds as electrode materials for lithium and sodium ion batteries.
- Multicomponent systems for supercapacitors.
- Composite oxide systems as thermoelectric materials.
- Hydrogen storage intermetallics.
- Developing spectroscopic methods (electron paramagnetic resonance, infrared and Raman spectroscopy) for analysis of the local structure of electrode materials.
All activities follow a common scientific approach: from tailored synthesis, through complex characterization to determination of chemical and physical properties. The objects of research are layered oxides and polyanionic compounds based on phosphates and sulfates as innovative electrode materials for lithium/sodium ion batteries; multicomponent hydroxides/oxides as electrodes for hybrid supercapacitors; magnesium-based nanocomposites for hydrogen storage. Original methods for synthesis are being developed, allowing control of the composition, structure and morphology of the materials. A complete set of physicochemical methods is applied for characterization: X-ray, spectroscopic, microscopic, thermal, sorption and electrochemical, which allows a detailed description of the mechanism of the processes of reversible intercalation/deintercalation and hydrogenation/dehydrogenation. By insights into the relationships between the macroscopic properties of the compounds and the local structure at the micro level, are created more efficient materials and the properties of those already known are controlled.
- Kalapsazova, M., Rasheev, H., Zhecheva, E., Tadjer, A., Stoyanova, R.:
Insights into the Function of Electrode and Electrolyte Materials in a Hybrid Lithium-Sodium Ion Cell.
Journal of Physical Chemistry C, 123 (2019) 11508-11521. IF: 4.309; Q1
- Stoyanova, R., Koleva, V., Stoyanova, A.:
Lithium versus Mono/Polyvalent Ion Intercalation: Hybrid Metal Ion Systems for Energy Storage (Review)
Chemical Record 19 (2019) 474-501. IF: 5.387; Q1
- Marinova, D.M., Kostov, V.V., Nikolova, R.P., Kukeva, R.R.,
Zhecheva, E.N., Stoyanova, R.K.:
Redox Properties of Alluaudite Sodium Cobalt Manganese Sulfates as High-voltage Electrodes for Rechargeable Batteries.
Chemical Communications 54 (2018) 5466-5469. IF: 6.164; Q1
- Koleva, V., Boyadzhieva, T., Stoyanova, R.:
Crystal and Morphology Design of Dttmarite-Type Ammonium Iron-Manganese Phosphates, NH4Mn1-xFexPO4.H2O, as Precursors for Phospho-Olivine Electrodes.
Crystal Growth & Design 19 (2019) 3744-3754. IF: 4.153; Q
- Mihaylov, L., Boyadzhieva, T., Tomov, R., Kumar, V., Koleva, V., Stoyanova, R., Spassov, T.:
LiMnPO4-olivine Deposited on a Nanoporous Alloy as an Additive-Free Electrodes for Lithium Ion Batteries.
Dalton Transactions 48 (2019) 17037-17044. IF: 4.052; Q1
- Grigorova, E., Khristov, M., Stoycheva, I., Tsyntsarski, B.:
Effect of Activated Carbon from Polyolefin Wax on the Hydrogensorption Properties of Magnesium.
International Journal of Hydrogen Energy 42 (2017) 26872-26876. IF: 3.582 Q1
- Laboratorio de Química Inorgánica, Universidad de Córdoba, Córdoba, Spain
- Bayerisches Geoinstitut, Universität Bayreuth, Bayreuth, Germany
- Grenoble High Magnetic Field Laboratory, Grenoble, France
- Institute of Chemistry, Cyril and Methodius University, Skopje, North Macedonia
- Helmholtz Institute Ulm (HIU), Ulm, Germany; Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany