Wojciech Zając

ORCID: 0000-0003-1959-4016
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About
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Research Areas
  • Advancements in Battery Materials
  • Advanced Battery Materials and Technologies
  • Advancements in Solid Oxide Fuel Cells
  • Advanced Battery Technologies Research
  • Electronic and Structural Properties of Oxides
  • Magnetic and transport properties of perovskites and related materials
  • Extraction and Separation Processes
  • Catalysis and Oxidation Reactions
  • Supercapacitor Materials and Fabrication
  • Catalytic Processes in Materials Science
  • Chemical Looping and Thermochemical Processes
  • Ferroelectric and Piezoelectric Materials
  • Semiconductor materials and interfaces
  • Thermal Expansion and Ionic Conductivity
  • Transition Metal Oxide Nanomaterials
  • Chemical Synthesis and Characterization
  • Advanced battery technologies research
  • Crystallization and Solubility Studies
  • Quasicrystal Structures and Properties
  • X-ray Diffraction in Crystallography
  • Engine and Fuel Emissions
  • Microwave Dielectric Ceramics Synthesis
  • Renewable energy and sustainable power systems
  • Nanoporous metals and alloys
  • Fuel Cells and Related Materials

AGH University of Krakow
2014-2023

Krakow Cardiovascular Research Institute
2017

Institute of Power Engineering
2017

Jagiellonian University
2012

10.1016/j.jpowsour.2007.05.085 article EN Journal of Power Sources 2007-05-28

Abstract Four proton conducting oxides of perovskite structure: BaZrO3, SrZrO3, BaCeO3 and SrCeO3 doped with 5 mol.% gadolinium are compared in terms crystal structure, microstructure, sinterability, water sorption ability, ionic transference number, electrical conductivity stability towards CO2. Relations between conductivity, structural chemical parameters: pseudo-cubic unit cell volume, lattice free tolerance factor, symmetry electronegativity discussed. The grain boundary resistance is...

10.2478/s11532-012-0144-9 article EN Open Chemistry 2012-10-31

A series of the high-entropy (Co,Cu,Mg,Ni,Zn)1-xLixO oxides with a lithium substitution level x = 0, 0.05, 0.10, 0.15, 0.20, 0.25, and 0.30 is evaluated in terms crystal structure, morphology transport properties, thorough studies aimed at elucidation nature different contributions to total electrical conductivity. It found that cubic Fm-3m structure preserved whole investigated series, (Co,Cu,Mg,Ni,Zn)0.8Li0.2O composition showing high internal strain, supporting some degree one so-called...

10.1016/j.actamat.2021.116735 article EN cc-by Acta Materialia 2021-02-11

Ordering in the transition metal sublattice O3 phase affects density of states near E F . Due to low conductivity its presence causes stronger polarization electrode and makes P3 → change unfavourable.

10.1039/d2ta08431g article EN Journal of Materials Chemistry A 2023-01-01

10.1016/j.ssi.2007.12.047 article EN Solid State Ionics 2008-02-01

LiFePO4 is considered to be one of the most promising cathode materials for lithium ion batteries electric vehicle (EV) application. However, there are still a number unsolved issues regarding influence Li and Fe-site substitution on physicochemical properties LiFePO4. This review-type article, presenting results our group, related possibility chemical modification phosphoolivine by introduction cation dopants in Fe sublattices. Along with synthetic review previous papers, large new...

10.3390/ma6051656 article EN Materials 2013-04-29

A new method of synthesis stoichiometric Na<sub>2</sub>FeM(SO<sub>4</sub>)<sub>3</sub> (M = Fe, Mn, Ni) materials is developed.

10.1039/c9ta11565j article EN Journal of Materials Chemistry A 2020-01-01

In this study, various techniques, such as energy-dispersive X-ray spectroscopy (EDX), diffraction (XRD), Raman spectroscopy, and spectrophotometry, were used to analyze the properties of nanometric CdS particles synthesized with varying precursor concentrations. EDX analysis revealed nonstoichiometric composition manifested by an increase in Cd/S ratio from 1.02 up 1.43 increasing concentration. The growth lattice parameters unit cell volume accompanying preferential crystallization...

10.1021/acs.inorgchem.3c00935 article EN cc-by Inorganic Chemistry 2023-06-29

Given the extensive efforts focused on protecting environment, eco-friendly cathode materials are a prerequisite for development of Na-ion battery technology. Such should contain abundant and inexpensive elements. In paper, we present NASICON-Na3Fe2-yMny(PO4)3 (y = 0, 0.1, 0.2, 0.3, 0.4) materials, which meet these requirements. Na3Fe2-yMny(PO4)3 compounds were prepared via solid-state reaction at 600 °C, allowed to obtain powders with submicron particles. The presence manganese in iron...

10.1021/acsami.9b10184 article EN ACS Applied Materials & Interfaces 2019-10-29

Abstract In this work, we report that modification of the chemical composition grain boundaries La 2/3-x Li 3x TiO 3 double perovskite, one most promising Li-ion conducting solid electrolytes, can be a convenient and versatile way controlling space charge potential, leading to mitigated electrical resistance boundaries. Two groups additives are investigated: lithium-enriching agents (Li BO , LiF) d metal ions (Co 2+ Cu ), both expected reduce Schottky barrier. It is observed Li-containing...

10.1007/s10853-020-05342-7 article EN cc-by Journal of Materials Science 2020-09-30
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