CobaltMaghrebV1, Main, Merge, bibRecord, 001131

On the NaxNi0.6Co0.4O2 system : Physical and electrochemical studies

Identifieur interne : 001131 ( Main/Merge ); précédent : 001130; suivant : 001132

On the NaxNi0.6Co0.4O2 system : Physical and electrochemical studies

Auteurs : I. Saadoune [Maroc] ; A. Maazaz [Maroc] ; M. Menetrier [France] ; C. Delmas [France]

Source :

Journal of solid state chemistry [ 0022-4596 ] ; 1996.

RBID : Pascal:96-0185253

Descripteurs français

Pascal (Inist)
- Sodium Oxyde, Nickel Oxyde, Cobalt Oxyde, Composé quaternaire, Réaction électrochimique, Composé insertion, Désinsertion, Iode, Matériau électrode, Accumulateur électrochimique, Coefficient diffusion, Cinétique, Solution électrolyte, Solution non aqueuse, XRD, Paramètre cristallin, Propriété magnétique, NaxNi0,6Co0,4O2, Co Na Ni O.
Wicri :
- topic : Iode.

English descriptors

KwdEn :
- Cobalt Oxides, Desinsertion, Diffusion coefficient, Electrochemical reaction, Electrode material, Electrolyte solution, Intercalation compound, Iodine, Kinetics, Lattice parameters, Magnetic properties, Nickel Oxides, Non aqueous solution, Quaternary compound, Secondary cell, Sodium Oxides, XRD.

Abstract

Sodium chemical deintercalation from the NaNi_0.6Co_0.4O₂ phase was realized by using iodine as oxidizing agent. The Na_0.58Ni_0.6Co_0.4O₂ phase obtained was used as the positive electrode in sodium batteries. Several structural transformations were observed during discharge (intercalation reaction). The magnetic and electrical study of the Na_xNi_0.6Co_0.4O₂ (x = 1, 0.80, 0.58) phases shows clearly that Ni^III (t₂⁶e¹ in LS configuration) is preferentially oxidized to the tetravalent state compared to CO^III (t₂⁶e⁰ in LS configuration). The sodium diffusion coefficient was also calculated in the solid solution domains. It shows that the diffusion kinetics is faster when sodium ions are situated in a prismatic environment.

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Pascal:96-0185253

Le document en format XML

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Ni<sub>0.6</sub>
Co<sub>0.4</sub>
O<sub>2</sub>
 system : Physical and electrochemical studies</title>
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">On the Na<sub>x</sub>
Ni<sub>0.6</sub>
Co<sub>0.4</sub>
O<sub>2</sub>
 system : Physical and electrochemical studies</title>
<author><name sortKey="Saadoune, I" sort="Saadoune, I" uniqKey="Saadoune I" first="I." last="Saadoune">I. Saadoune</name>
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<author><name sortKey="Maazaz, A" sort="Maazaz, A" uniqKey="Maazaz A" first="A." last="Maazaz">A. Maazaz</name>
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<s2>Marrakesh</s2>
<s3>MAR</s3>
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<s3>FRA</s3>
<sZ>3 aut.</sZ>
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<affiliation wicri:level="3"><inist:fA14 i1="02"><s1>Institut de Chimie de la Matière Condensée de Bordeaux and Ecole Nationale Supérieure de Chimie et Physique de Bordeaux, Avenue Dr. A. Schweitzer</s1>
<s2>33608 Pessac</s2>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Cobalt Oxides</term>
<term>Desinsertion</term>
<term>Diffusion coefficient</term>
<term>Electrochemical reaction</term>
<term>Electrode material</term>
<term>Electrolyte solution</term>
<term>Intercalation compound</term>
<term>Iodine</term>
<term>Kinetics</term>
<term>Lattice parameters</term>
<term>Magnetic properties</term>
<term>Nickel Oxides</term>
<term>Non aqueous solution</term>
<term>Quaternary compound</term>
<term>Secondary cell</term>
<term>Sodium Oxides</term>
<term>XRD</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Sodium Oxyde</term>
<term>Nickel Oxyde</term>
<term>Cobalt Oxyde</term>
<term>Composé quaternaire</term>
<term>Réaction électrochimique</term>
<term>Composé insertion</term>
<term>Désinsertion</term>
<term>Iode</term>
<term>Matériau électrode</term>
<term>Accumulateur électrochimique</term>
<term>Coefficient diffusion</term>
<term>Cinétique</term>
<term>Solution électrolyte</term>
<term>Solution non aqueuse</term>
<term>XRD</term>
<term>Paramètre cristallin</term>
<term>Propriété magnétique</term>
<term>NaxNi0,6Co0,4O2</term>
<term>Co Na Ni O</term>
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<front><div type="abstract" xml:lang="en">Sodium chemical deintercalation from the NaNi<sub>0.6</sub>
Co<sub>0.4</sub>
O<sub>2</sub>
 phase was realized by using iodine as oxidizing agent. The Na<sub>0.58</sub>
Ni<sub>0.6</sub>
Co<sub>0.4</sub>
O<sub>2</sub>
 phase obtained was used as the positive electrode in sodium batteries. Several structural transformations were observed during discharge (intercalation reaction). The magnetic and electrical study of the Na<sub>x</sub>
Ni<sub>0.6</sub>
Co<sub>0.4</sub>
O<sub>2</sub>
 (x = 1, 0.80, 0.58) phases shows clearly that Ni<sup>III</sup>
 (t<sub>2</sub>
<sup>6</sup>
e<sup>1</sup>
 in LS configuration) is preferentially oxidized to the tetravalent state compared to CO<sup>III</sup>
 (t<sub>2</sub>
<sup>6</sup>
e<sup>0</sup>
 in LS configuration). The sodium diffusion coefficient was also calculated in the solid solution domains. It shows that the diffusion kinetics is faster when sodium ions are situated in a prismatic environment.</div>
</front>
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<name sortKey="Maazaz, A" sort="Maazaz, A" uniqKey="Maazaz A" first="A." last="Maazaz">A. Maazaz</name>
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<name sortKey="Delmas, C" sort="Delmas, C" uniqKey="Delmas C" first="C." last="Delmas">C. Delmas</name>
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On the NaxNi0.6Co0.4O2 system : Physical and electrochemical studies

On the NaxNi0.6Co0.4O2 system : Physical and electrochemical studies

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri