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Particle evolution in Mg-Zn-Zr alloy processed by integrated extrusion and equal channel angular pressing
Dmitry Orlov, Kei Ameyama, Yuri Estrin, Daniele Pelliccia, Xiya Fang, Laure Bourgeois, Nigel Kirby, Andrei Y. Nikulin, 2014, original scientific article

Found in: ključnih besedah
Summary of found: ... magnesium, intermetallic particles, severe plastic deformation, small angle...
Keywords: magnesium, intermetallic particles, severe plastic deformation, small angle X-ray scattering
Published: 16.06.2016; Views: 2624; Downloads: 8
URL Fulltext (0,00 KB)

Advances and Achievements in In Situ Analysis of Corrosion and Structure– Property Relationship in Mg Alloys
Dmytro Orlov, Vineet Joshi, 2016, preface, afterword

Found in: ključnih besedah
Summary of found: ... magnesium alloys, in-situ...
Keywords: magnesium alloys, in-situ
Published: 20.02.2017; Views: 1921; Downloads: 0
.pdf Fulltext (1013,61 KB)

Atomic-level mechanisms of magnesium oxidation
Dmytro Orlov, Matjaž Valant, SANDRA GARDONIO, Mattia Fanetti, 2016, published scientific conference contribution

Abstract: Magnesium has been recently becoming an increasingly popular material for various applications. However, excessive chemical reactivity, and oxidation rate in particular, is a major obstruction on the way of Mg to become widely adopted. A significant problem causing the lack of Mg reactivity control is insufficient understanding of mechanisms involved in the oxidation of magnesium surface. Herewith we present the investigation of atomic-level mechanisms of oxidation initiation and propagation in pure Mg. Namely, X-ray photoelectron spectroscopy at synchrotron Elettra was used as a surface sensitive direct method to determine the valence of Mg and O and the valence band states at the early stage of oxide formation over a principal, most densely packed, crystallographic plane (0001) in pure Mg. The mechanisms of oxygen adsorption on magnesium free surface followed by oxidation (i.e. initiation and kinetics of MgO formation) are clarified. Copyright © 2016 by The Minerals, Metals & Materials Society. All rights reserved.
Found in: ključnih besedah
Keywords: Magnesium, Oxidation, Synchrotron radiation, X-ray photoelectron spectroscopy
Published: 25.08.2017; Views: 1853; Downloads: 0
.pdf Fulltext (2,91 MB)

A Mechanistic Study of Magnesium Sulfur Batteries
Ana Robba, Alen Vižintin, Jan Bitenc, Gregor Mali, Iztok Arčon, Matjaž Kavčič, Matjaž Žitnik, Klemen Bučar, Giuliana Aquilanti, Charlotte Martineau-Corcos, Anna Randon-Vitanova, Robert Dominko, 2017, original scientific article

Abstract: Magnesium sulfur batteries are considered as attractive energy storage devices due to the abundance of electrochemically active materials and high theoretical energy density. Here we report the mechanism of a Mg-S battery operation, which was studied in the presence of simple and commercially available salts dissolved in a mixture of glymes. The electrolyte offers high sulfur conversion into MgS in the first discharge with low polarization. The electrochemical conversion of sulfur with magnesium proceeds through two well-defined plateaus, which correspond to the equilibrium between sulfur and polysulfides (high-voltage plateau) and polysulfides and MgS (low-voltage plateau). As shown by XANES, RIXS and NMR studies, the end discharge phase involves MgS with Mg atoms in a tetrahedral environment resembling the wurtzite structure, while chemically synthesized MgS crystalizes in the rock-salt structure with octahedral coordination of magnesium.
Found in: ključnih besedah
Keywords: magnesium, sulfur, rechargeable batteries, XAS, NMR
Published: 19.10.2017; Views: 1708; Downloads: 0
.pdf Fulltext (1,48 MB)

A mechanistic study of metal sulfur batteries
Iztok Arčon, Ana Robba, Sara Drvarič Talian, Alen Vižintin, Robert Dominko, 2018, published scientific conference contribution abstract (invited lecture)

Found in: ključnih besedah
Keywords: Li-sulphur batteries, Sulphur XANES, magnesium
Published: 15.10.2020; Views: 163; Downloads: 0

Adding dimensions to the immersion testing of magnesium corrosion
Lars Wadsö, Dmitry Orlov, 2018, published scientific conference contribution

Found in: ključnih besedah
Keywords: magnesium, corrosion, isothermal calorimetry, pressure measurements
Published: 11.03.2019; Views: 815; Downloads: 0
.pdf Fulltext (405,05 KB)

Role of Cu current collector on electrochemical mechanism of Mg–S battery
Ana Robba, Maja Mežnar, Alen Vižintin, Jan Bitenc, Jernej Bobnar, Iztok Arčon, Anna Randon-Vitanova, Robert Dominko, 2020, original scientific article

Abstract: Development of magnesium sulfur battery is accompanied with all known difficulties present in Li–S batteries, however with even more limited choice of electrolytes. In the present work, the influence of current collector on electrochemical mechanism was investigated in light of different reports where improved behavior was ascribed to electrolyte. Notable differences in cycling behavior are reported when Al current collector is replaced by Cu current collector independent of electrolyte. The initial reduction of sulfur follows similar reaction path no mater of current collector, but formation of MgS can be in competition with formation of CuS in the presence of Cu cations. With the subsequent cycling cells prepared from cathodes deposited on Cu current collector show decrease in the voltage and formation of single plateau during cycling. The change corresponds to the involvement of Cu into the reaction and formation of redox couple Mg/CuS as determined by Cu K-edge XANES measurements. Corrosion of Cu foil is identified by SEM and serves as a source of Cu cations for the chemical reaction between Cu and polysulfides. Mg/CuS redox couple shows improved cycling stability, but theoretical energy density is severely reduced due to substitution of S with CuS as cathode active material.
Found in: ključnih besedah
Summary of found: ...Development of magnesium sulfur battery is accompanied with all known...
Keywords: Magnesium Sulfur Rechargeable batteries Current collector Copper Corrosion
Published: 16.01.2020; Views: 577; Downloads: 0
.pdf Fulltext (1,86 MB)

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