A5027997014- Advancements in Solid Oxide Fuel Cells
- Magnetic and transport properties of perovskites and related materials
- Electronic and Structural Properties of Oxides
- Catalytic Processes in Materials Science
- Thermal Expansion and Ionic Conductivity
- Perovskite Materials and Applications
- Organic Electronics and Photovoltaics
- Conducting polymers and applications
- Ferroelectric and Piezoelectric Materials
- Electrocatalysts for Energy Conversion
- Nuclear materials and radiation effects
- Fuel Cells and Related Materials
- Multiferroics and related materials
- High-Temperature Coating Behaviors
- Advanced Condensed Matter Physics
- Microwave Dielectric Ceramics Synthesis
- High Entropy Alloys Studies
- Physics of Superconductivity and Magnetism
AGH University of Krakow
2018-2024
Jagiellonian University
2024
The oxygen storage capacity, exchange kinetics, structure and thermodynamic stability were studied for hexagonal Y<sub>0.7</sub>Tb<sub>0.3</sub>MnO<sub>3+δ</sub> in air to assess its applicability separation from by a temperature-swing adsorption process.
Planar perovskite solar cells were fabricated on F-doped SnO2 (FTO) coated glass substrates, with 4,4’-((1E,1’E)-((1,2,4-thiadiazole-3,5-diyl)bis(azaneylylidene))bis(methaneylylidene))bis(N,N-di-p-tolylaniline) (bTAThDaz) as hole transport material. This imine was synthesized in one step reaction, starting from commercially available and relatively inexpensive reagents. Electrochemical, optical, electrical, thermal structural studies including images current-voltage measurements of the full...
The A-site cation-ordered GdBa0.5Sr0.5Co2-xCuxO5+δ (GBSCC) double perovskites are evaluated regarding the development of high-performance oxygen electrodes for reversible solid oxide cells (rSOCs). aims to maximally decrease content toxic and expensive cobalt by substitution with copper while at same time improving or maintaining required thermomechanical electrocatalytic properties. Studies reveal that compositions 1 ≤ x 1.15 particularly interesting. Their thermal chemical expansions...
Abstract Hexagonal Y 1− x R MnO 3+ δ (R: other than rare earth elements) oxides have been recently introduced as promising oxygen storage materials that can be utilized in the temperature swing processes for separation and air enrichment. In present work, average local structures of Tb- Ce-substituted 0.7 Tb 0.15 Ce 0.6 0.2 were studied, their storage-related properties evaluated. The fully oxidized samples show presence a significant amount highly oxygen-loaded so-called Hex3 phase,...
This work presents the results of research on transport properties high-entropy BaZr1/8Hf1/8Sn1/8Ti1/8Y1/8In1/8Sm1/8Yb1/8O3–x perovskite oxide with special focus proton transport. The presented study is part broader in which we multiple different chemical compositions cation number varying from 5 up to 12 (in B-sublattice). presence defects analyzed thermogravimetry, whereas electrochemical impedance spectroscopy dry, H2O-, and D2O-containing synthetic air 300–800 °C temperature range enable...
It is documented that the mean radius r¯ of rare-earth cations occupying Y1-xRx sublattice in Y1-xRxMnO3+δ hexagonal oxides plays a decisive role terms thermodynamics and kinetics reactivity materials with oxygen, consequently, influences strongly oxygen storage performance thermal swing processes conducted air. samples designed being close to critical one, at border stability between hexagonal- perovskite-type phases, can reversibly incorporate/release significant amounts pure O2 or air...
It has been documented that the total electrical conductivity of hexagonal rare-earth manganites Y0.95Pr0.05MnO3+δ and Y0.95Nd0.05MnO3+δ, as well undoped YMnO3+δ, is largely dependent on oxygen excess δ, which increases considerably at temperatures below ca. 300 °C in air or O2. Improvement for samples maintaining same P63cm crystal structure can exceed 3 orders magnitude 200 related to amount intercalated oxygen. At time, doping with Nd3+ Pr3+ affects ability materials incorporate O2,...
This paper proposes molecular and supramolecular concepts for potential application in perovskite solar cells. New air-stable symmetrical imine, with thiadiazole moieties PPL2: (5E,6E)-N2,N5-bis(4-(diphenylamino)benzylidene)-1,3,4-thiadiazole-2,5-diamine), as a hole-transporting material was synthesised single-step reaction, starting commercially available relatively inexpensive reagents, resulting reduction the cost of final product compared to Spiro-OMeTAD. Moreover, camphorsulfonic acid...
Doping with copper is studied in a series of double perovskite-type GdBa 0.5 Sr Co 2-x Cu x O 5+δ , candidate oxygen electrode materials for reversible Solid Oxide Cells. Obtained by sol-gel method, the material = 1.15, having highest amount introduced (lowest content) selected, and systematically evaluated regarding physicochemical characteristics, as well chemical stability La 0.8 0.2 Ga Mg 3-δ Ce 0.9 Gd 0.1 2-δ solid electrolytes. Promising electrochemical performance obtained if this...
An attempt is undertaken to chemically modify YMnO3+δ by the partial substitution of Y with larger Nd and Sm, aiming boost oxygen storage performance in temperature swing process. Single-phase (P63cm) Y0.95Nd0.05MnO3+δ Y0.95Sm0.05MnO3+δ compounds are obtained a sol-gel auto-combustion process followed annealing at 1000 °C Ar. Both materials show improved capacity, however, doping Nd3+ enables effective operation air – capacity reached 1453 μmol-O g−1, which over 86% O2. As documented for...
Nd 2 CuO[Formula: see text] is known to possess either oxygen vacancies or interstitial defects, depending on the synthesis route, as well may exhibit A-site deficiency. In this work, insight into physicochemical properties of and Nd[Formula: text]CuO[Formula: layered oxides given, focusing crystal structure, electrical conductivity, permeation, numerical density functional theory (DFT) simulations concerning ionic defects formation their possible movement in structure. The results indicate...
Sustainable development and better protection of environment are among the top priority issues for human society. Seeking cleaner less greenhouse-emissive energy resources or solutions has been a dominating trend around world, since daily functioning current society is still dependent on fossil sources, such as oil, coal, also natural gas. Tremendous efforts have made to develop alternative production technologies, them, fuel cells found very promising ones. Especially, reversible Solid...
The studies of structural, thermogravimetric, and charge transport properties the BaZr1/8Hf1/8Sn1/8Ti1/8y1/8In1/8Sm1/8Yb1/8O3-x oxide were performed with XRD, HT-XRD, TGA, impedance spectroscopy electrical conductivity relaxation (ECR). It was found that incorporation water into leads to chemical expansion unit cell. temperature range sorption desorption from structure as well amount incorporated determined. sample investigated by electrochemical in dry, H2O- D2O-containing synthetic air...