A. Budziak

Jahn–Teller distortion of Mn³⁺ ions as a decisive factor for the electrochemical performance of Mn substituted Na2.5-x(Fe1-yMny)1.75(SO4)3 alluaudites

Janina Molenda, Anna Milewska, A. Budziak, Wojciech Zając et autres

Partially manganese-substituted alluaudite-type Na 2.5-x (Fe 1-y Mn y ) 1.75 (SO 4 ) 3 materials represent an attractive group of cathode materials for Na-ion batteries, offering a balance between high voltage (4 V vs. Na/Na⁺) and operational stability; however, in the …

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Experimental and Theoretical Investigation of the κ-Phase (Ag2Mg5) in the Ag-Mg System

Weronika Gozdur, Wojciech Gierlotka, Magdalena Bieda, W. Gąsior et autres

The present study extends the investigation of thermodynamic properties of phases in the silver–magnesium binary system, with particular emphasis on the κ-Ag2Mg5 phase, for which available literature data remain scarce. The work is divided into two parts. The experimental section comprises the …

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Reduced graphene oxide paper electrode for lithium-ion cells – towards optimized thermal reduction

Agata Pawłowska, M. Baran, Stefan Marynowicz, Aleksandra Banasiak et autres

This work introduces the results of characterizing free-standing reduced graphene oxide paper, given its potential use as an electrode material in lithium-ion cells. Mildly reduced graphene oxide paper underwent further thermal reduction steps. The structural and chemical properties of the obtained materials …

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The copper-magnesium system: calorimetric studies and phase diagram calculations

Weronika Gozdur, Wojciech Gierlotka, W. Gąsior, M. Bieda et autres

To enrich the existing knowledge of the thermodynamic properties of the Cu-Mg system, new complementary experimental and theoretical studies were carried out. The measurements of the change in the enthalpy of mixing of liquid Cu-Mg solutions were performed for Cu concentrations from …

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Magazynowanie energii w kontekście transformacji energetycznej – od materiałów po systemy. Wybrane kierunki badań i zastosowanie oraz współpraca z operatorami sieci i przemysłem

Andrzej Firlit, A. Budziak, Dominik Gryboś, Andrzej Kulka et autres

Magazynowanie energii odgrywa kluczową rolę w procesie transformacji energetycznej, umożliwiając efektywną integrację odnawialnych źródeł energii, zwiększenie elastyczności systemów energetycznych oraz poprawę niezawodności dostaw energii. W artykule przedstawiono wybrane kierunki badań prowadzonych w Akademii Górniczo-Hutniczej w Krakowie koncentrujących się na zagadnieniach związanych z …

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Calorimetric Studies of the Silver-Titanium System

Weronika Gozdur, Wojciech Gierlotka, W. Gąsior, Anna Wierzbicka-Miernik et autres

Alloys from the Ag-Ti system are extremely promising and offer the possibility of versatile applications owing to their attractive properties. However, due to the experimental difficulties caused, among others, by the significant difference in melting points of the components, most of the …

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Unique properties of the electronic structure of alluaudite sodium iron sulfate cathode material and the impact on its electrochemical performance

Janina Molenda, J. Toboła, Anna Milewska, A. Budziak et autres

This work presents the study of the electronic structure of alluaudite-type Na 2.5 Fe 1.75 (SO 4 ) 3 and its impact on electrochemical performance as a cathode material for sodium-ion batteries (SIBs). Density functional theory calculations using the KKR-CPA method (Korringa–Kohn–Rostoker …

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Calorimetric Studies of the Mg-Pt System

A. Dębski, Magda Pęska, S. Terlicka, Julita Dworecka-Wójcik et autres

This study presents the limiting partial enthalpy of a solution of Pt in liquid Sn and Al baths, as well as, for the first time, the standard enthalpies of the formation of intermetallic phases and alloys of the Mg–Pt system, obtained using …

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Unique Properties of the Electronic Structure of Alluaudite Sodium Iron Sulfate Cathode Material and the Impact on its Electrochemical Performance

Janina Molenda, J. Toboła, Anna Milewska, A. Budziak et autres

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Calorimetric Studies and Thermodynamic Modeling of Ag–Mg–Ti Liquid Alloys

Weronika Gozdur, W. Gąsior, Maciej Zrobek, A. Budziak et autres

Due to the absence of thermodynamic data concerning the Ag–Mg–Ti system in the existing literature, this study aims to fill this gap by offering the outcomes of calorimetric investigations conducted on ternary liquid solutions of these alloys. The measurements were performed using …

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The Influence of Hydrogen on Structural and Magnetic Transformations in RMn2Hx Hydrides with Laves Phase C15 and C14 Structures—A Review

A. Budziak, Joanna Szafraniec-Szczęsny

Laves phases crystallize in simple structures and are very common intermetallic phases that can form from combinations of elements throughout the periodic table, giving a huge number of known examples. A special feature of AB2 or AB5 phases is the ability to …

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Electrochemical performance of different high-entropy cathode materials for Na-ion batteries

Mikołaj Nowak, Katarzyna Walczak, Anna Milewska, Justyna Płotek et autres

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