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Intermetallics and intercalation materials

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:

  1. Design of intercalation compounds as electrode materials for lithium and sodium ion batteries.
  2. Multicomponent systems for supercapacitors.
  3. Composite oxide systems as thermoelectric materials.
  4. Hydrogen storage intermetallics.
  5. 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.

Selected publications

  1. 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
  2. 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
  3. 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
  4. 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
  5. 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
  6. 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

International collaborations

  • 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


Radostina Stoyanova

Prof. Dr.

Call: (+ 359)2 979 39 15

Email: radstoy@svr.igic.bas.bg

Violeta Koleva

Prof. Dr.

Call: (+ 359) 2 979 35 66

Email: vkoleva@svr.igic.bas.bg, vilkoleva61@gmail.com

Eli Grigorova

Assoc. Prof. Dr.

Call: (+ 359) 2 979 25 63

Email: egeorg@svr.igic.bas.bg

Delyana Manasieva

Assoc. Prof. Dr.

Call: (+ 359) 2 979 39 04

Email: d.manasieva@gmail.com, manasieva@svr.igic.bas.bg

Mariya Kalapsazova

Assist. Prof. Dr.

Call: (+ 359) 2 979 39 04

Email: maria_l_k@svr.igic.bas.bg, maria.kalapsazova@gmail.com

Sonya Harizanova

Assist. Prof. Dr.

Call: (+ 359) 2 979 39 04

Email: sonya@svr.igic.bas.bg, soncheto@gmail.com

Pavel Markov

Assist. Prof. Dr.

Call: (+ 359) 2 979 25 63

Email: pvlmarkov@svr.igic.bas.bg, pvlmarkov@yahoo.com

Rosica Kukeva

PhD student

Call: (+ 359) 2 979 35 74

Email: rositsakukeva@yahoo.com

Silva Stanchovska

Assist. Prof. Dr.

Call: (+ 359) 2 979 39 04

Email: stanchovska@svr.igic.bas.bg; sil_stan@abv.bg

Ekaterina Zhecheva

Prof. Dr. (retiree)

Call: (+ 359) 2 979 39 15

Email: zhecheva@svr.igic.bas.bg

Lyuben Borislavov


Call: (+359) 2 979 39 04

Email: lubenkr@abv.bg

Trajce Tusev

Chemistry technician

Call: (+359) 2 979 39 04

Email: trajce_tusev65@hotmail.com



Bulgarian National Science Fund
National Scientific Program “Vihren 2019”
modul “Leading researcher”
coordinator Prof. R. Stoyanova
duration 2020-2024

Contract DN 09/13

Bulgarian National Science Fund
Coordinator Prof. R. Stoyanova
Duration 2017-2020

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Contract KP-06-OPR 04/5 dated 08.12.2018

Project coordinator from IGIC:
Prof. Dr. R. Stoyanova
Duration 2018-2021


Bulgarian National Science Fund
Project coordinator for IGIC:
Assos. Prof. Dr. E. Grigorova
Duration 2018-2021


Project coordinator from IGIC:
Prof. Dr. R. Stoyanova
Duration: 2019-2023

Energy Storage and Hydrogen Energy Contract D01-160/28.08.2018

Project coordinator from IGIC:
Prof. Dr. R. Stoyanova
duration 2018-2022

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Component 1 “Storage and transformation of renewable energy”

Project coordinator from IGIC:
Prof. Dr. R. Stoyanova
Duration 2018-2023

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Contract D01-155/28.08.2018

Project coordinator from IGIC:
Prof. Dr. R. Stoyanova
Duration 2018-2022

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National Research Programme “Young scientists and postdoctoral students”
Assist. Prof. Dr. T. Boyadzhieva
Duration 2019-2021