The effect of the temperature on the electrochemical properties of the hydrogen storage alloy for nickel-metal hydride accumulators
Identifieur interne : 000048 ( France/Analysis ); précédent : 000047; suivant : 000049The effect of the temperature on the electrochemical properties of the hydrogen storage alloy for nickel-metal hydride accumulators
Auteurs : C. Khaldi [Tunisie] ; S. Boussami [Tunisie] ; M. Tliha [Tunisie, Arabie saoudite] ; S. Azizi [Tunisie] ; N. Fenineche [France] ; O. El-Kedim [France] ; H. Mathlouthi [Tunisie] ; Jilani Lamloumi [Tunisie]Source :
- Journal of alloys and compounds [ 0925-8388 ] ; 2013.
Descripteurs français
- Pascal (Inist)
- Dépendance température, Propriété électrochimique, Stockage hydrogène, Solubilité, Nickel alliage, Hydrure de nickel, Matériau électrode, Enthalpie, Propriété thermodynamique, Entropie, Energie activation, Corrosion, Densité courant, Potentiel corrosion, Résistance corrosion, Couche mince, Capacité électrique, Spectroscopie impédance électrochimique, Modélisation, Etude théorique, Méthode électrochimique, 6475, 8245F, 6540G.
- Wicri :
- topic : Corrosion.
English descriptors
- KwdEn :
- Activation energy, Capacitance, Corrosion, Corrosion potential, Corrosion resistance, Current density, Electrochemical impedance spectroscopy, Electrochemical method, Electrochemical properties, Electrode material, Enthalpy, Entropy, Hydrogen storage, Modelling, Nickel alloys, Nickel hydride, Solubility, Temperature dependence, Theoretical study, Thermodynamic properties, Thin films.
Abstract
The electrochemical properties of The LaNi3.55Mn0.4Al0.3Co0.75 alloy as a negative electrode material of a nickel-metal hydride accumulator have been investigated at different temperatures. The Activation of the alloy becomes faster with an increasing temperature. The enthalpy, the entropy and the apparent activation energy of the LaNi3.55Mn0.4Al0.3Co0.75Hx hydride formation are evaluated. The calculated results show that the enthalpy change, the entropy change and the activation energy are (-29 kJ mol-1), (26.5 JK-1 mol-1) and (24.6 kJ mol-1), respectively. The corrosion current density increases with increasing the temperature and the corrosion potential becomes more positive and increases linearly with the temperature. This result is confirmed by the values of corrosion film resistance and the corrosion film capacitance determined through the electrochemical spectroscopy impedance modeling.
Url:
Affiliations:
- Arabie saoudite, France, Tunisie
- Bourgogne-Franche-Comté, Franche-Comté, Gouvernorat de Tunis
- Belfort, Tunis
- Université de Tunis, Université de technologie de Belfort-Montbéliard
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Pascal:13-0271889Le document en format XML
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Activation energy</term>
<term>Capacitance</term>
<term>Corrosion</term>
<term>Corrosion potential</term>
<term>Corrosion resistance</term>
<term>Current density</term>
<term>Electrochemical impedance spectroscopy</term>
<term>Electrochemical method</term>
<term>Electrochemical properties</term>
<term>Electrode material</term>
<term>Enthalpy</term>
<term>Entropy</term>
<term>Hydrogen storage</term>
<term>Modelling</term>
<term>Nickel alloys</term>
<term>Nickel hydride</term>
<term>Solubility</term>
<term>Temperature dependence</term>
<term>Theoretical study</term>
<term>Thermodynamic properties</term>
<term>Thin films</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Dépendance température</term>
<term>Propriété électrochimique</term>
<term>Stockage hydrogène</term>
<term>Solubilité</term>
<term>Nickel alliage</term>
<term>Hydrure de nickel</term>
<term>Matériau électrode</term>
<term>Enthalpie</term>
<term>Propriété thermodynamique</term>
<term>Entropie</term>
<term>Energie activation</term>
<term>Corrosion</term>
<term>Densité courant</term>
<term>Potentiel corrosion</term>
<term>Résistance corrosion</term>
<term>Couche mince</term>
<term>Capacité électrique</term>
<term>Spectroscopie impédance électrochimique</term>
<term>Modélisation</term>
<term>Etude théorique</term>
<term>Méthode électrochimique</term>
<term>6475</term>
<term>8245F</term>
<term>6540G</term>
</keywords>
<keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Corrosion</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front><div type="abstract" xml:lang="en">The electrochemical properties of The LaNi<sub>3.55</sub>
Mn<sub>0.4</sub>
Al<sub>0.3</sub>
Co<sub>0.75</sub>
alloy as a negative electrode material of a nickel-metal hydride accumulator have been investigated at different temperatures. The Activation of the alloy becomes faster with an increasing temperature. The enthalpy, the entropy and the apparent activation energy of the LaNi<sub>3.55</sub>
Mn<sub>0.4</sub>
Al<sub>0.3</sub>
Co<sub>0.75</sub>
H<sub>x</sub>
hydride formation are evaluated. The calculated results show that the enthalpy change, the entropy change and the activation energy are (-29 kJ mol<sup>-1</sup>
), (26.5 JK<sup>-1</sup>
mol<sup>-1</sup>
) and (24.6 kJ mol<sup>-1</sup>
), respectively. The corrosion current density increases with increasing the temperature and the corrosion potential becomes more positive and increases linearly with the temperature. This result is confirmed by the values of corrosion film resistance and the corrosion film capacitance determined through the electrochemical spectroscopy impedance modeling.</div>
</front>
</TEI>
<affiliations><list><country><li>Arabie saoudite</li>
<li>France</li>
<li>Tunisie</li>
</country>
<region><li>Bourgogne-Franche-Comté</li>
<li>Franche-Comté</li>
<li>Gouvernorat de Tunis</li>
</region>
<settlement><li>Belfort</li>
<li>Tunis</li>
</settlement>
<orgName><li>Université de Tunis</li>
<li>Université de technologie de Belfort-Montbéliard</li>
</orgName>
</list>
<tree><country name="Tunisie"><region name="Gouvernorat de Tunis"><name sortKey="Khaldi, C" sort="Khaldi, C" uniqKey="Khaldi C" first="C." last="Khaldi">C. Khaldi</name>
</region>
<name sortKey="Azizi, S" sort="Azizi, S" uniqKey="Azizi S" first="S." last="Azizi">S. Azizi</name>
<name sortKey="Boussami, S" sort="Boussami, S" uniqKey="Boussami S" first="S." last="Boussami">S. Boussami</name>
<name sortKey="Lamloumi, J" sort="Lamloumi, J" uniqKey="Lamloumi J" first="J." last="Lamloumi">Jilani Lamloumi</name>
<name sortKey="Mathlouthi, H" sort="Mathlouthi, H" uniqKey="Mathlouthi H" first="H." last="Mathlouthi">H. Mathlouthi</name>
<name sortKey="Tliha, M" sort="Tliha, M" uniqKey="Tliha M" first="M." last="Tliha">M. Tliha</name>
</country>
<country name="Arabie saoudite"><noRegion><name sortKey="Tliha, M" sort="Tliha, M" uniqKey="Tliha M" first="M." last="Tliha">M. Tliha</name>
</noRegion>
</country>
<country name="France"><region name="Bourgogne-Franche-Comté"><name sortKey="Fenineche, N" sort="Fenineche, N" uniqKey="Fenineche N" first="N." last="Fenineche">N. Fenineche</name>
</region>
<name sortKey="El Kedim, O" sort="El Kedim, O" uniqKey="El Kedim O" first="O." last="El-Kedim">O. El-Kedim</name>
</country>
</tree>
</affiliations>
</record>
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