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Research interests

Solid state chemistry. Synthesis, structural and electrochemical characterization of sodium and lithium intercalation compounds (oxides) as electrode materials for rechargeable alkaline-ion batteries. Development of prospective ecological electrode materials for grid-scale energy storage applications. Purposeful modification of layered oxides for improving their electrochemical performance.

Selected publications

1. М. Kalapsazova; H. Rasheev; E. Zhecheva; A. Tadjer and R. Stoyanova,
   “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.
2. M. Kalapsazova, S. Ivanova, R. Kukeva, S. Simova, S. Wegner, E. Zhecheva and R. Stoyanova,
   “Combined use of EPR and ²³Na MAS NMR spectroscopy for assessing the properties of mixed cobalt-nickel-manganese layers of P3-Na_yCo_1-2xNi_xMn_xO₂”,
   Physical Chemistry Chemical Physics 19 (2017), 27065-27073.
3. M. Kalapsazova, E. Zhecheva, G. Tyuliev, D. Nihtianova, L. Mihaylov and R. Stoyanova,
   “Effect of the particle size distribution and of the electrolyte salt on the intercalation properties of P3- Na_2/3Ni_1/2Mn_1/2O₂” ,
   Journal of Physical Chemistry C 121 (11), (2017), 5931-5940.
4. M. Kalapsazova, M., G. F. Ortiz , J. L.Tirado, O.Dolotko,  E. Zhecheva,  D. Nihtyanova,  L. Mihaylov and R. Stoyanova, 
   „P3-type of layered sodium-deficient nickel-manganese oxides: a flexible structural matrix for reversible sodium and lithium intercalation“,
   ChemPlusChem 80 (11), (2015), 1642-1656.
5. M. Kalapsazova, R. Stoyanova, E. Zhecheva, G. Tyuliev and D.Nihtianova, 
   „Sodium deficient nickel-manganese oxides as intercalation electrodes in lithium ion batteries“,
   Journal of Materials Chemistry A 2, (2014), 19383-19395.