Electrochemical impedance spectroscopy study of the metal hydride alloy/electrolyte junction
Identifieur interne : 000515 ( Main/Exploration ); précédent : 000514; suivant : 000516Electrochemical impedance spectroscopy study of the metal hydride alloy/electrolyte junction
Auteurs : Chokri Khaldi [Tunisie] ; Hamadi Mathlouthi [Tunisie] ; Jilani Lamloumi [Tunisie]Source :
- Journal of alloys and compounds [ 0925-8388 ] ; 2009.
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Abstract
The behaviour of the LaNi3.55Mn0.4Al0.3Co0.75 alloy, used as a negative electrode in the Ni-MH batteries, was studied by the electrochemical impedance spectroscopy (EIS), measured at different potentials. The modeling of the EIS spectra allows us to model the interface electrolyte/Ni-MH electrode by a succession of interfaces electrolyte/corrosion film/alloy particles. The various processes and the physics parameters of each interface are discussed and evaluated. When the potential shifts to more negative values, two reactions are in competition: the hydrogen molecular evolution and the hydrogen atomic absorption. The hydrogen diffuses in the bulk of the alloy and the diffusion is not the limiting factor for the hydrogen absorption.
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last="Khaldi">Chokri Khaldi</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></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, Hamadi" sort="Mathlouthi, Hamadi" uniqKey="Mathlouthi H" first="Hamadi" last="Mathlouthi">Hamadi 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></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, Jilani" sort="Lamloumi, Jilani" uniqKey="Lamloumi J" first="Jilani" 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></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></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="2009">2009</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>Absorption</term><term>Corrosion</term><term>Cyclic voltammetry</term><term>Electrochemical properties</term><term>Electrode electrolyte interface</term><term>Electrode impedance</term><term>Equivalent circuit</term><term>Hydrides</term><term>Limiting factor</term><term>Lithium battery</term><term>Modeling</term><term>Nickel</term><term>Nyquist diagram</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Modélisation</term><term>Propriété électrochimique</term><term>Corrosion</term><term>Schéma équivalent</term><term>Facteur limitant</term><term>Voltammétrie cyclique</term><term>Interface électrode électrolyte</term><term>Batterie lithium</term><term>Impédance électrode</term><term>Absorption</term><term>Diagramme Nyquist</term><term>Hydrure</term><term>Nickel</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Corrosion</term><term>Nickel</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The behaviour of the LaNi<sub>3.55</sub>Mn<sub>0.4</sub>Al<sub>0.3</sub>Co<sub>0.75</sub> alloy, used as a negative electrode in the Ni-MH batteries, was studied by the electrochemical impedance spectroscopy (EIS), measured at different potentials. The modeling of the EIS spectra allows us to model the interface electrolyte/Ni-MH electrode by a succession of interfaces electrolyte/corrosion film/alloy particles. The various processes and the physics parameters of each interface are discussed and evaluated. When the potential shifts to more negative values, two reactions are in competition: the hydrogen molecular evolution and the hydrogen atomic absorption. The hydrogen diffuses in the bulk of the alloy and the diffusion is not the limiting factor for the hydrogen absorption.</div></front></TEI><affiliations><list><country><li>Tunisie</li></country><region><li>Gouvernorat de Tunis</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="Khaldi, Chokri" sort="Khaldi, Chokri" uniqKey="Khaldi C" first="Chokri" last="Khaldi">Chokri Khaldi</name></region><name sortKey="Lamloumi, Jilani" sort="Lamloumi, Jilani" uniqKey="Lamloumi J" first="Jilani" last="Lamloumi">Jilani Lamloumi</name><name sortKey="Mathlouthi, Hamadi" sort="Mathlouthi, Hamadi" uniqKey="Mathlouthi H" first="Hamadi" last="Mathlouthi">Hamadi Mathlouthi</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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