Study of the aging of LaNi3.55Mn0.4Al0.3(Co1-xFex)0.75 (0≤x≤1) compounds in Ni-MH batteries by SEM and magnetic measurements
Identifieur interne : 000235 ( France/Analysis ); précédent : 000234; suivant : 000236Study of the aging of LaNi3.55Mn0.4Al0.3(Co1-xFex)0.75 (0≤x≤1) compounds in Ni-MH batteries by SEM and magnetic measurements
Auteurs : M. Ayaria [Tunisie] ; V. Paul-Boncour [France] ; J. Lamloumia [Tunisie] ; A. Percheron-Guegan [France] ; M. Guillot [France]Source :
- Journal of magnetism and magnetic materials [ 0304-8853 ] ; 2005.
Descripteurs français
- Pascal (Inist)
- Vieillissement, Batterie, Cycle charge décharge, Microscopie électronique balayage, Aimantation, Propriété volume, Propriété magnétique, Verre spin, Antiferromagnétisme, Interaction échange, Ferromagnétisme, Epaisseur, Corrosion, Nickel, Matériau électrode, Fer, Hydrure, Métal transition, Fe, 75, 7520.
- Wicri :
English descriptors
- KwdEn :
Abstract
The study of LaNi3.55Mn0.4Al0.3(Co1-xFex)0.75 (0≤x≤1) alloys as material for negative electrodes in Ni-MH batteries has shown that the electrochemical cycle life is strongly dependent on the amount of substituted iron. The samples have been characterized before and after 2 to 50 electrochemical cycles by scanning electron microscopy (SEM) and magnetization measurements in order to follow the decrepitation and the decomposition of the alloys. The bulk magnetic properties of the alloy show an evolution from a spin glass behaviour dominated by antiferromagnetic interactions towards a ferromagnetic behaviour as the Fe content increases. After electrochemical cycling, the alloys are partially decomposed into La hydroxide and small metallic and oxidized transition metal particles. A correlation has been established between the loss of electrochemical capacity and the alloy decomposition which reaches 45% after 50 cycles for x= 1, whereas it remains limited to 10-15% for x = 0 and 0.47. A model combining both SEM and magnetic results has been used to estimate the average thickness of the corrosion layer.
Affiliations:
- France, Tunisie
- Auvergne-Rhône-Alpes, Gouvernorat de Tunis, Rhône-Alpes, Île-de-France
- Grenoble, Thiais, Tunis
Links toward previous steps (curation, corpus...)
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- to stream Main, to step Exploration: 000802
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Links to Exploration step
Pascal:05-0130812Le document en format XML
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Ayaria</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>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="Paul Boncour, V" sort="Paul Boncour, V" uniqKey="Paul Boncour V" first="V." last="Paul-Boncour">V. Paul-Boncour</name><affiliation wicri:level="3"><inist:fA14 i1="02"><s1>Laboratoire de Chimie Métallurgique des Terres Rares, GLVT, CNRS, 2-8 Rue Henri Dunant</s1><s2>94320 Thiais</s2><s3>FRA</s3><sZ>2 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Île-de-France</region><settlement type="city">Thiais</settlement></placeName></affiliation></author><author><name sortKey="Lamloumia, J" sort="Lamloumia, J" uniqKey="Lamloumia J" first="J." last="Lamloumia">J. Lamloumia</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>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="Percheron Guegan, A" sort="Percheron Guegan, A" uniqKey="Percheron Guegan A" first="A." last="Percheron-Guegan">A. 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The samples have been characterized before and after 2 to 50 electrochemical cycles by scanning electron microscopy (SEM) and magnetization measurements in order to follow the decrepitation and the decomposition of the alloys. The bulk magnetic properties of the alloy show an evolution from a spin glass behaviour dominated by antiferromagnetic interactions towards a ferromagnetic behaviour as the Fe content increases. After electrochemical cycling, the alloys are partially decomposed into La hydroxide and small metallic and oxidized transition metal particles. A correlation has been established between the loss of electrochemical capacity and the alloy decomposition which reaches 45% after 50 cycles for x= 1, whereas it remains limited to 10-15% for x = 0 and 0.47. A model combining both SEM and magnetic results has been used to estimate the average thickness of the corrosion layer.</div></front></TEI><affiliations><list><country><li>France</li><li>Tunisie</li></country><region><li>Auvergne-Rhône-Alpes</li><li>Gouvernorat de Tunis</li><li>Rhône-Alpes</li><li>Île-de-France</li></region><settlement><li>Grenoble</li><li>Thiais</li><li>Tunis</li></settlement></list><tree><country name="Tunisie"><region name="Gouvernorat de Tunis"><name sortKey="Ayaria, M" sort="Ayaria, M" uniqKey="Ayaria M" first="M." last="Ayaria">M. Ayaria</name></region><name sortKey="Lamloumia, J" sort="Lamloumia, J" uniqKey="Lamloumia J" first="J." last="Lamloumia">J. Lamloumia</name></country><country name="France"><region name="Île-de-France"><name sortKey="Paul Boncour, V" sort="Paul Boncour, V" uniqKey="Paul Boncour V" first="V." last="Paul-Boncour">V. Paul-Boncour</name></region><name sortKey="Guillot, M" sort="Guillot, M" uniqKey="Guillot M" first="M." last="Guillot">M. Guillot</name><name sortKey="Percheron Guegan, A" sort="Percheron Guegan, A" uniqKey="Percheron Guegan A" first="A." last="Percheron-Guegan">A. Percheron-Guegan</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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