Impedance spectroscopy (IS) is a relatively new and powerful method allowing for the investigation of electrical properties of matter and relaxation phenomena with time constants ranging over nearly ten orders of magnitude. Impedance measurements can be performed with high accuracy in automa-tized and remotely controlled systems, however, a broader application of IS in material science and electrochemistry (EIS) is still impeded by the limited number of comprehensive explanations and theories describing different physicochemical systems. In general, impedance technique requires also physico-chemical information on a given system acquired by using other complementary methods.


Rafał Jurczakowski Ph.D.



Rafał Jurczakowski is a co-author of 48 scientif-ic papers published in prestigious international journals in the field of chemistry and electrochem-istry, co-authored 12 national and 8 international patent applications. Five international patents have already been granted in the countries of the European Union, the USA and Japan.Selected awards for scientific and didactic activities:

  • Scientific Award of the Second Degree of the Council of the Faculty of Chemistry at the University of Warsaw (2016)
  • Teaching Excellence Award of the Second Degree of the Council of the Faculty of Chemistry at the University of Warsaw
  • Antoni Grabowski Scientific Award of the Council of the Faculty of Chemistry, University of Warsaw for outstanding scientific achievements, which contributed to the increase of prestige of Polish science in the world (2007)
  • Distinction of the doctoral thesis, University of Warsaw, Faculty of Chemistry (2003


Rafał Jurczakowski Ph.D.
CNBCh UW, room 1.14

Agnieszka Tymosiak-Stefańska Ph.D.,
Aneta Januszewska M.Sc.,
Piotr Połczyński M.Sc.,
Maciej Słojewski M.Sc.,
Krzysztof Strzałkowski M.Sc.,
Paulina Mieldzioć,
Cuc Nguyen,
Paweł Kulboka,
Mikołaj Rdzanek.


The research group is interested in the innovative use of the electrochemical methods in chemical sci-ence. Our work is related to the theoretical develop-ment and use of impedance spectroscopy for kinet-ic and thermodynamic studies of (electro)chemical systems under both supported and unsupported (solid state) conditions. Special emphasis has been placed on the hydrogen sorption phenomena and electrode reactions involving hydrogen adsorption and absorption. Impedance spectroscopy has been also used for the characterization of nonmetallic hydrogen stores by monitoring dielectric proper-ties in solid state during hydrogen release from hydrogen-rich ammonia borane and its alkali metal derivatives.Research Interests:

  • Electrochemical Energy Conversion and Storage Technologies
  • Hydrogen sorption
  • Heterogeneous Catalysis
  • Photoelectrocatalysis
  • Nanostructured Material


  • Classical transient and impedance spectroscopy electrochemical measurements
  • Impedance tests, conductivity and charge transport dynamics measurements
  • Interpretation of impedance spectra
  • Research and synthesis of materials for applications in electrocatalysis and heterogeneous catalysis
  • Synthesis and testing of sorption materials
  • Synthesis of nanomaterials for applications in heterogeneous catalysis