CobaltMaghrebV1, Main, Exploration, bibRecord, 000A67

Decomposition of the LaNi3.55Mn0.4Al0.3Fe0.75 compound upon electrochemical cycling studied by magnetic properties

Identifieur interne : 000A67 ( Main/Exploration ); précédent : 000A66; suivant : 000A68

Decomposition of the LaNi3.55Mn0.4Al0.3Fe0.75 compound upon electrochemical cycling studied by magnetic properties

Auteurs : M. Ayari [Tunisie] ; V. Paul-Boncour [France] ; Jilani Lamloumi [Tunisie] ; A. Percheron-Guegan [France]

Source :

Journal of alloys and compounds [ 0925-8388 ] ; 2003.

RBID : Pascal:03-0427108

Descripteurs français

Pascal (Inist)
- Cycle charge décharge, Durée vie, Corrosion, Précipitation, Superparamagnétisme, Stockage hydrogène, Etude expérimentale, Aimantation, Fer alliage, Lanthane alliage, Nickel alliage, Composé intermétallique, Matériau électrode, Manganèse alliage, Composé n éléments, Alliage LaNiMnAlFe, Al Fe La Mn Ni, 8460V, 8245F.
Wicri :
- topic : Corrosion.

English descriptors

KwdEn :
- Corrosion, Discharge charge cycle, Electrode material, Experimental study, Hydrogen storage, Intermetallic compound, Iron alloy, Lanthanum alloy, Lifetime, Magnetization, Manganèse alloy, Multi-element compound, Nickel alloy, Precipitation, Superparamagnetism.

Abstract

The effect of iron substitution for cobalt in LaNi_3.55Mn_0.4Al_0.3Co_0.75-xFe_x (x=0, 0.35, 0.75) on the evolution of the storage capacity during charge/discharge cycles has been investigated. The partial replacement of Co by Fe improves the cycle lifetime of the alloy. However, the total substitution of Fe for Co leads to a very great loss of capacity and therefore considerable alloy decomposition may occur during cycling, due to the corrosion process. The magnetic properties of LaNi_3.55Mn_0.4Al_0.3Fe_0.75 and their evolution during the electrochemical cycle have been studied in order to characterize quantitatively the alloy decomposition. This study shows that the amount of decomposed alloy increases with the number of cycles and leads to the precipitation of superparamagnetic Ni-Fe bimetallic particles (d = 1-10 nm). A correlation is established between the loss of electrochemical capacity, the amounts of decomposed alloy and segregated Ni-Fe particles.

Affiliations:

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Le document en format XML

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Al<sub>0.3</sub>
Fe<sub>0.75</sub>
 compound upon electrochemical cycling studied by magnetic properties</title>
<author><name sortKey="Ayari, M" sort="Ayari, M" uniqKey="Ayari M" first="M." last="Ayari">M. Ayari</name>
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Decomposition of the LaNi<sub>3.55</sub>
Mn<sub>0.4</sub>
Al<sub>0.3</sub>
Fe<sub>0.75</sub>
 compound upon electrochemical cycling studied by magnetic properties</title>
<author><name sortKey="Ayari, M" sort="Ayari, M" uniqKey="Ayari M" first="M." last="Ayari">M. Ayari</name>
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<series><title level="j" type="main">Journal of alloys and compounds</title>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Corrosion</term>
<term>Discharge charge cycle</term>
<term>Electrode material</term>
<term>Experimental study</term>
<term>Hydrogen storage</term>
<term>Intermetallic compound</term>
<term>Iron alloy</term>
<term>Lanthanum alloy</term>
<term>Lifetime</term>
<term>Magnetization</term>
<term>Manganèse alloy</term>
<term>Multi-element compound</term>
<term>Nickel alloy</term>
<term>Precipitation</term>
<term>Superparamagnetism</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Cycle charge décharge</term>
<term>Durée vie</term>
<term>Corrosion</term>
<term>Précipitation</term>
<term>Superparamagnétisme</term>
<term>Stockage hydrogène</term>
<term>Etude expérimentale</term>
<term>Aimantation</term>
<term>Fer alliage</term>
<term>Lanthane alliage</term>
<term>Nickel alliage</term>
<term>Composé intermétallique</term>
<term>Matériau électrode</term>
<term>Manganèse alliage</term>
<term>Composé n éléments</term>
<term>Alliage LaNiMnAlFe</term>
<term>Al Fe La Mn Ni</term>
<term>8460V</term>
<term>8245F</term>
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<front><div type="abstract" xml:lang="en">The effect of iron substitution for cobalt in LaNi<sub>3.55</sub>
Mn<sub>0.4</sub>
Al<sub>0.3</sub>
Co<sub>0.75-x</sub>
Fe<sub>x</sub>
 (x=0, 0.35, 0.75) on the evolution of the storage capacity during charge/discharge cycles has been investigated. The partial replacement of Co by Fe improves the cycle lifetime of the alloy. However, the total substitution of Fe for Co leads to a very great loss of capacity and therefore considerable alloy decomposition may occur during cycling, due to the corrosion process. The magnetic properties of LaNi<sub>3.55</sub>
Mn<sub>0.4</sub>
Al<sub>0.3</sub>
Fe<sub>0.75</sub>
 and their evolution during the electrochemical cycle have been studied in order to characterize quantitatively the alloy decomposition. This study shows that the amount of decomposed alloy increases with the number of cycles and leads to the precipitation of superparamagnetic Ni-Fe bimetallic particles (d = 1-10 nm). A correlation is established between the loss of electrochemical capacity, the amounts of decomposed alloy and segregated Ni-Fe particles.</div>
</front>
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<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>
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Decomposition of the LaNi3.55Mn0.4Al0.3Fe0.75 compound upon electrochemical cycling studied by magnetic properties

Decomposition of the LaNi3.55Mn0.4Al0.3Fe0.75 compound upon electrochemical cycling studied by magnetic properties

Source :

Descripteurs français

English descriptors

Abstract

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

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri