On the mechanism of the P2-Na0.70CoO2→O2-LiCoO2 exchange reaction. Part I: proposition of a model to describe the P2-02 transition
Identifieur interne : 000A15 ( Main/Merge ); précédent : 000A14; suivant : 000A16On the mechanism of the P2-Na0.70CoO2→O2-LiCoO2 exchange reaction. Part I: proposition of a model to describe the P2-02 transition
Auteurs : F. Tournadre [France] ; L. Croguennec [France] ; I. Saadoune [France, Maroc] ; D. Carlier [France] ; Y. Shoe-Horn [France] ; P. Willmann [France] ; C. Delmas [France]Source :
- Journal of solid state chemistry : (Print) [ 0022-4596 ] ; 2004.
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- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
A model was proposed to describe the exchange reaction of sodium by lithium in P2 crystals. The exchange consists on the formation of nucleation centers and then on the growth of O2 domains in P2 crystals from these nucleation centers. Octahedral environments for lithium ions are obtained when one slab over two glides by (2/3,1/3,0) or by (1/3,2/3,0) in P2 structure. The existence of two different gliding vectors should lead to stacking faulted structures that can be simulated using DIFFaX software. The comparison of simulated and experimental XRD patterns for 02- LiCoO2(ex-Na0.7CoO2) has shown that in that case the growth of the O2 domains in the P2 crystals is faster than the formation of nucleation centers.
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Pascal:05-0019356Le document en format XML
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CoO<sub>2</sub>
→O2-LiCoO<sub>2</sub>
exchange reaction. Part I: proposition of a model to describe the P2-02 transition</title>
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CoO<sub>2</sub>
→O2-LiCoO<sub>2</sub>
exchange reaction. Part I: proposition of a model to describe the P2-02 transition</title>
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<series><title level="j" type="main">Journal of solid state chemistry : (Print)</title>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Cobalt oxides</term>
<term>Digital simulation</term>
<term>Exchange interactions</term>
<term>Experimental study</term>
<term>Lamellar structure</term>
<term>Lithium oxides</term>
<term>Nucleation</term>
<term>Sodium oxides</term>
<term>Stacking faults</term>
<term>Ternary compounds</term>
<term>XRD</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Etude expérimentale</term>
<term>Interaction échange</term>
<term>Nucléation</term>
<term>Défaut empilement</term>
<term>Simulation numérique</term>
<term>Diffraction RX</term>
<term>Sodium oxyde</term>
<term>Cobalt oxyde</term>
<term>Composé ternaire</term>
<term>Lithium oxyde</term>
<term>Structure lamellaire</term>
<term>Na0,70CoO2</term>
<term>Co Na O</term>
<term>LiCoO2</term>
<term>Co Li O</term>
<term>6460Q</term>
<term>6172N</term>
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<front><div type="abstract" xml:lang="en">A model was proposed to describe the exchange reaction of sodium by lithium in P2 crystals. The exchange consists on the formation of nucleation centers and then on the growth of O2 domains in P2 crystals from these nucleation centers. Octahedral environments for lithium ions are obtained when one slab over two glides by (2/3,1/3,0) or by (1/3,2/3,0) in P2 structure. The existence of two different gliding vectors should lead to stacking faulted structures that can be simulated using DIFFaX software. The comparison of simulated and experimental XRD patterns for 02- LiCoO<sub>2</sub>
(ex-Na<sub>0.7</sub>
CoO<sub>2</sub>
) has shown that in that case the growth of the O2 domains in the P2 crystals is faster than the formation of nucleation centers.</div>
</front>
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