| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Garbarczyk, Jerzy
Warsaw University of Technology
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (29/29 displayed)
- 2022Novel High-Pressure Nanocomposites for Cathode Materials in Sodium Batteriescitations
- 2021Towards Higher Electric Conductivity and Wider Phase Stability Range via Nanostructured Glass-Ceramics Processingcitations
- 2019Multifold pressure-induced increase of electric conductivity in LiFe<inf>0.75</inf>V<inf>0.10</inf>PO<inf>4</inf> glasscitations
- 2016Dependence of a glass transition temperature on a heating rate in DTA experiments for glasses containing transition metal oxidescitations
- 2016Synthesis of nanostructured Li3Me2(PO4)2F3 glass-ceramics (Me = V, Fe, Ti)citations
- 2016Nanocrystallisation in vanadate phosphate and lithium iron vanadate phosphate glassescitations
- 2015High electronic conductivity in nanostructured materials based on lithium-iron-vanadate-phosphate glassescitations
- 2013Isothermal nanocrystallization of vanadate-phosphate glassescitations
- 2013Novel vanadium-doped olivine-like nanomaterials with high electronic conductivitycitations
- 2011DSC and electrical conductivity studies on superionic all-glass phosphate-based composites
- 2011Electrical properties of the all-glass composite silver ion conductorscitations
- 2011Electrical properties and thermal stability of FePO4 glasses and nanomaterialscitations
- 2011Electrical properties vs. microstructure of nanocrystallized V2O5–P2O5 glasses — An extended temperature range studycitations
- 2011Electrical conductivity and phase transformations in the composite ionic conductors AgI : α-Al2O3 prepared via a high-pressure routecitations
- 2009Novel nanomaterials based on electronic and mixed conductive glassescitations
- 2009The thermal stability, local structure and electrical properties of lithium-iron phosphate glasses
- 2009Correlation between electrical properties and microstructure of nanocrystallized V2O5–P2O5 glassescitations
- 2008Electrical properties and microstructure of glassy-crystalline Ag+-ion conducting composites synthesized by a high-pressure methodcitations
- 2007Nanocrystallization as a method of improvement of electrical properties and thermal stability of V2O5-rich glassescitations
- 2007AgI-Ag2O-V2O5 glasses as ion-to-electron transducers for the construction of all-solid-state microelectrodescitations
- 2007Conductivity, thermal behavior and microstructure of new composites based on AgI–Ag2O–B2O3 glasses with Al2O3 matrixcitations
- 2006Conductivity and microstructure of silver borate glass/zirconia composites, prepared via a high pressure route
- 2006Effect of nanocrystallization on the electronic conductivity of vanadate-phosphate glassescitations
- 2006Crystallization processes in superionic AgI-Ag20-P205 ([Ag2O]/[P2O5] = 3) glasses
- 2006Ammonium- and nitrate-selective all-solid-state microelectrodes based on AgI-Ag2O-V2O5 glass transducer
- 2005A XANES study of the valence state of vanadium in lithium vanadate phosphate glassescitations
- 2004Enhancement of electrical conductivity in lithium vanadate glasses by nanocrystallizationcitations
- 2003Cyclic voltammetry and impedance spectroscopy studies of silver vanadate phosphate glassescitations
- 2001Ionic conductivity of glass-ceramic composites in the AgI-Ag<inf>2</inf>O-V<inf>2</inf>O<inf>5</inf> system
Places of action
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article
Novel vanadium-doped olivine-like nanomaterials with high electronic conductivity
Abstract
Olivine-like lithium iron phosphate (LiFePO4) is the most studied cathode material for a new generation of commercial Li-ion batteries. In this work we have studied the effect of thermal nanocrystallization on the electronic conductivity of the LiFe0.75V0.10PO4 glasses. The electrical conductivity of the as-prepared glass extrapolated to room temperature was as low as 10- 12 S · cm- 1. An appropriate thermal treatment of the glass led, however, to an immense increase in its electrical conductivity (up to 10- 3 S · cm- 1) and to a decrease in the activation energy from 1.0 eV for a freshly synthesized material to 0.17 eV after heat treatment. In the best conducting sample a large number of 5 ÷ 10 nm nanocrystallites of LiFePO4 were observed by SEM, STEM and HRTEM techniques. We ascribe the immense increase in the conductivity to especially advantageous conditions for polaron hopping between aliovalent iron and/or vanadium ions, created during the thermally induced microstructural changes. No traces of metallic impurities (such e.g., Fe2P) were found, but some presence of an electrochemically active Li3V2(PO4)3 phase was detected by XRD. © 2013 Elsevier B.V. All rights reserved.