Electrochemical characteristics of AB5-type hydrogen storage alloys
Identifieur interne : 000124 ( France/Analysis ); précédent : 000123; suivant : 000125Electrochemical characteristics of AB5-type hydrogen storage alloys
Auteurs : M. Tliha [Tunisie] ; S. Boussami [Tunisie] ; H. Mathlouthi [Tunisie] ; Jilani Lamloumi [Tunisie] ; A. Percheron-Guegan [France]Source :
- Journal of alloys and compounds [ 0925-8388 ] ; 2010.
Descripteurs français
- Pascal (Inist)
- Propriété électrochimique, Stockage hydrogène, Cinétique, Hydrure de nickel, Batterie, Spectroscopie impédance électrochimique, Valence, Mesure charge électrique, Dépendance fréquence, Schéma équivalent, Interface, Electrolyte, Transfert charge, Densité courant, Nickel, Coefficient diffusion, Réaction électrochimique, Hydrogénation, LaNi3.55Mn0.4Al0.3Co0.4Fe0.35, 8245.
- Wicri :
- geographic : Valence (Drôme).
- topic : Nickel.
English descriptors
- KwdEn :
- Battery, Charge measurement, Charge transfer, Current density, Diffusion coefficient, Electrochemical impedance spectroscopy, Electrochemical properties, Electrochemical reaction, Electrolyte, Equivalent circuit, Frequency dependence, Hydrogen storage, Hydrogenation, Interface, Kinetics, Nickel, Nickel hydride, Valence.
Abstract
The kinetic behaviour of the LaNi3.55Mn0.4Al0.3Co0.4Fe0.35 metal hydride, used as a negative electrode in the nickel/metal-hydride (Ni/MH) batteries, was investigated using electrochemical impedance spectroscopy (EIS) at different state of charge (SOC). Impedance measurements were performed in the frequency range from 50 kHz to 1 mHz. Electrochemical impedance spectrum of the metal hydride electrode was interpreted by an equivalent circuit including the different electrochemical processes taking place on the interface between the MH electrode and the electrolyte. Electrochemical kinetic parameters such as the charge-transfer resistance Rtc, the exchange current density I0 and the hydrogen diffusion coefficient DH were determined at different state of charge. The results of EIS measurements indicate that the electrochemical reaction activity of the LaNi3.55Mn0.4Al0.3Co0.4Fe0.35 metal hydride electrode was markedly improved with increasing state of charge (SOC). The transformation α-β is probably a limiting step in the mechanisms of hydrogenation of metal hydride electrode.
Affiliations:
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Pascal:10-0475140Le document en format XML
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Tliha</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratoire de Mécanique, Matériaux et Procédés, ESSTT, 5 Avenue Taha Hussein</s1><s2>1008 Tunis</s2><s3>TUN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Tunisie</country><placeName><settlement type="city">Tunis</settlement><region nuts="2">Gouvernorat de Tunis</region></placeName></affiliation></author><author><name sortKey="Boussami, S" sort="Boussami, S" uniqKey="Boussami S" first="S." last="Boussami">S. Boussami</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratoire de Mécanique, Matériaux et Procédés, ESSTT, 5 Avenue Taha Hussein</s1><s2>1008 Tunis</s2><s3>TUN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Tunisie</country><placeName><settlement type="city">Tunis</settlement><region nuts="2">Gouvernorat de Tunis</region></placeName></affiliation></author><author><name sortKey="Mathlouthi, H" sort="Mathlouthi, H" uniqKey="Mathlouthi H" first="H." last="Mathlouthi">H. Mathlouthi</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratoire de Mécanique, Matériaux et Procédés, ESSTT, 5 Avenue Taha Hussein</s1><s2>1008 Tunis</s2><s3>TUN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Tunisie</country><placeName><settlement type="city">Tunis</settlement><region nuts="2">Gouvernorat de Tunis</region></placeName></affiliation></author><author><name sortKey="Lamloumi, J" sort="Lamloumi, J" uniqKey="Lamloumi J" first="J." last="Lamloumi">Jilani Lamloumi</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratoire de Mécanique, Matériaux et Procédés, ESSTT, 5 Avenue Taha Hussein</s1><s2>1008 Tunis</s2><s3>TUN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Tunisie</country><placeName><settlement type="city">Tunis</settlement><region nuts="2">Gouvernorat de Tunis</region></placeName><placeName><settlement type="city">Tunis</settlement><region type="region" nuts="2">Gouvernorat de Tunis</region></placeName><orgName type="university" n="3">Université de Tunis</orgName></affiliation></author><author><name sortKey="Percheron Guegan, A" sort="Percheron Guegan, A" uniqKey="Percheron Guegan A" first="A." last="Percheron-Guegan">A. Percheron-Guegan</name><affiliation wicri:level="3"><inist:fA14 i1="02"><s1>Laboratoire de Chimie Métallurgique des Terres Rares, GLVT; 2-8 Rue Henri Dunant 94320</s1><s2>Thiais</s2><s3>FRA</s3><sZ>5 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>Thiais</wicri:noRegion><placeName><region type="region" nuts="2">Île-de-France</region></placeName></affiliation></author></analytic><series><title level="j" type="main">Journal of alloys and compounds</title><title level="j" type="abbreviated">J. alloys compd.</title><idno type="ISSN">0925-8388</idno><imprint><date when="2010">2010</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Journal of alloys and compounds</title><title level="j" type="abbreviated">J. alloys compd.</title><idno type="ISSN">0925-8388</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Battery</term><term>Charge measurement</term><term>Charge transfer</term><term>Current density</term><term>Diffusion coefficient</term><term>Electrochemical impedance spectroscopy</term><term>Electrochemical properties</term><term>Electrochemical reaction</term><term>Electrolyte</term><term>Equivalent circuit</term><term>Frequency dependence</term><term>Hydrogen storage</term><term>Hydrogenation</term><term>Interface</term><term>Kinetics</term><term>Nickel</term><term>Nickel hydride</term><term>Valence</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Propriété électrochimique</term><term>Stockage hydrogène</term><term>Cinétique</term><term>Hydrure de nickel</term><term>Batterie</term><term>Spectroscopie impédance électrochimique</term><term>Valence</term><term>Mesure charge électrique</term><term>Dépendance fréquence</term><term>Schéma équivalent</term><term>Interface</term><term>Electrolyte</term><term>Transfert charge</term><term>Densité courant</term><term>Nickel</term><term>Coefficient diffusion</term><term>Réaction électrochimique</term><term>Hydrogénation</term><term>LaNi3.55Mn0.4Al0.3Co0.4Fe0.35</term><term>8245</term></keywords><keywords scheme="Wicri" type="geographic" xml:lang="fr"><term>Valence (Drôme)</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Nickel</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The kinetic behaviour of the LaNi<sub>3.55</sub>Mn<sub>0.4</sub>Al<sub>0.3</sub>Co<sub>0.4</sub>Fe<sub>0.35</sub> metal hydride, used as a negative electrode in the nickel/metal-hydride (Ni/MH) batteries, was investigated using electrochemical impedance spectroscopy (EIS) at different state of charge (SOC). Impedance measurements were performed in the frequency range from 50 kHz to 1 mHz. Electrochemical impedance spectrum of the metal hydride electrode was interpreted by an equivalent circuit including the different electrochemical processes taking place on the interface between the MH electrode and the electrolyte. Electrochemical kinetic parameters such as the charge-transfer resistance R<sub>tc</sub>, the exchange current density I<sub>0</sub> and the hydrogen diffusion coefficient D<sub>H</sub> were determined at different state of charge. The results of EIS measurements indicate that the electrochemical reaction activity of the LaNi<sub>3.55</sub>Mn<sub>0.4</sub>Al<sub>0.3</sub>Co<sub>0.4</sub>Fe<sub>0.35</sub> metal hydride electrode was markedly improved with increasing state of charge (SOC). The transformation α-β is probably a limiting step in the mechanisms of hydrogenation of metal hydride electrode.</div></front></TEI><affiliations><list><country><li>France</li><li>Tunisie</li></country><region><li>Gouvernorat de Tunis</li><li>Île-de-France</li></region><settlement><li>Tunis</li></settlement><orgName><li>Université de Tunis</li></orgName></list><tree><country name="Tunisie"><region name="Gouvernorat de Tunis"><name sortKey="Tliha, M" sort="Tliha, M" uniqKey="Tliha M" first="M." last="Tliha">M. Tliha</name></region><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></country><country name="France"><region name="Île-de-France"><name sortKey="Percheron Guegan, A" sort="Percheron Guegan, A" uniqKey="Percheron Guegan A" first="A." last="Percheron-Guegan">A. Percheron-Guegan</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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