Effect of partial substitution of co with Fe on the properties of LaNi3.55Mn0.4Al0.3Co0.75-xFex (x=0, 0.15, 0.55) alloys electrodes
Identifieur interne : 000968 ( Main/Exploration ); précédent : 000967; suivant : 000969Effect of partial substitution of co with Fe on the properties of LaNi3.55Mn0.4Al0.3Co0.75-xFex (x=0, 0.15, 0.55) alloys electrodes
Auteurs : C. Khaldi [Tunisie] ; H. Mathlouthi [Tunisie] ; Jilani Lamloumi [Tunisie] ; A. Percheron-Guegan [France]Source :
- Journal of alloys and compounds [ 0925-8388 ] ; 2003.
Descripteurs français
- Pascal (Inist)
- Voltammétrie cyclique, Corrosion, Processus réversible, Oxydoréduction, Etude expérimentale, Diffusivité, Coefficient diffusion, Fer alliage, Matériau électrode, Cobalt alliage, Aluminium alliage, Manganèse alliage, Lanthane alliage, Nickel alliage, Alliage LaNiMnAlCoFe, Al Co Fe La Mn Ni, 8245F, 8245A.
- Wicri :
- topic : Corrosion.
English descriptors
- KwdEn :
Abstract
The effect of iron substitution on the electrochemical behaviour of LaNi3.55Mn0.4Al0.3Co0.75-xFex compounds (x=0, 0.15, 0.55) has been studied by chronopotentiometry and cyclic voltammetry techniques. The maximum capacity decreases linearly from 308 to 239 mAhg-1 when the iron content increases from 0 to 7.3 wt.% (x=0.55). This decrease can be explained by the corrosion of the alloy in the aqueous KOH electrolyte. In spite of this decrease and of the long time needed for the activation, a good stability of discharge capacity was observed in LaNi3.35Mn0.4Al0.3Co0.75-xFex compounds. The reversibility of the electrochemical redox reaction of LaNi3.55Mn0.4Al0.3Co0.75-xFex alloy electrodes has been observed in the alloys least rich in iron. The hydrogen diffusivity in LaNi3.55Mn0.4Al0.3Co0.75-xFex alloy electrodes decreases when increasing the iron content. The obtained values of the hydrogen diffusion coefficient DH, varies between 2.1×10-7 and 8.2×10-9 cm2s-1 depending on the iron content of the electrode.
Affiliations:
Links toward previous steps (curation, corpus...)
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Le document en format XML
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Mn<sub>0.4</sub>
Al<sub>0.3</sub>
Co<sub>0.75-x</sub>
Fe<sub>x</sub>
(x=0, 0.15, 0.55) alloys electrodes</title>
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Effect of partial substitution of co with Fe on the properties of 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, 0.15, 0.55) alloys electrodes</title>
<author><name sortKey="Khaldi, C" sort="Khaldi, C" uniqKey="Khaldi C" first="C." last="Khaldi">C. Khaldi</name>
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<author><name sortKey="Mathlouthi, H" sort="Mathlouthi, H" uniqKey="Mathlouthi H" first="H." last="Mathlouthi">H. Mathlouthi</name>
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<placeName><settlement type="city">Tunis</settlement>
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<author><name sortKey="Lamloumi, J" sort="Lamloumi, J" uniqKey="Lamloumi J" first="J." last="Lamloumi">Jilani Lamloumi</name>
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<author><name sortKey="Percheron Guegan, A" sort="Percheron Guegan, A" uniqKey="Percheron Guegan A" first="A." last="Percheron-Guegan">A. Percheron-Guegan</name>
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<series><title level="j" type="main">Journal of alloys and compounds</title>
<title level="j" type="abbreviated">J. alloys compd.</title>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Aluminium alloy</term>
<term>Cobalt alloy</term>
<term>Corrosion</term>
<term>Cyclic voltammetry</term>
<term>Diffusion coefficient</term>
<term>Diffusivity</term>
<term>Electrode material</term>
<term>Experimental study</term>
<term>Iron alloy</term>
<term>Lanthanum alloy</term>
<term>Manganèse alloy</term>
<term>Nickel alloy</term>
<term>Oxidation reduction</term>
<term>Reversible processes</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Voltammétrie cyclique</term>
<term>Corrosion</term>
<term>Processus réversible</term>
<term>Oxydoréduction</term>
<term>Etude expérimentale</term>
<term>Diffusivité</term>
<term>Coefficient diffusion</term>
<term>Fer alliage</term>
<term>Matériau électrode</term>
<term>Cobalt alliage</term>
<term>Aluminium alliage</term>
<term>Manganèse alliage</term>
<term>Lanthane alliage</term>
<term>Nickel alliage</term>
<term>Alliage LaNiMnAlCoFe</term>
<term>Al Co Fe La Mn Ni</term>
<term>8245F</term>
<term>8245A</term>
</keywords>
<keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Corrosion</term>
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<front><div type="abstract" xml:lang="en">The effect of iron substitution on the electrochemical behaviour of 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>
compounds (x=0, 0.15, 0.55) has been studied by chronopotentiometry and cyclic voltammetry techniques. The maximum capacity decreases linearly from 308 to 239 mAhg<sup>-1</sup>
when the iron content increases from 0 to 7.3 wt.% (x=0.55). This decrease can be explained by the corrosion of the alloy in the aqueous KOH electrolyte. In spite of this decrease and of the long time needed for the activation, a good stability of discharge capacity was observed in LaNi<sub>3.35</sub>
Mn<sub>0.4</sub>
Al<sub>0.3</sub>
Co<sub>0.75-x</sub>
Fe<sub>x</sub>
compounds. The reversibility of the electrochemical redox reaction of 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>
alloy electrodes has been observed in the alloys least rich in iron. The hydrogen diffusivity 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>
alloy electrodes decreases when increasing the iron content. The obtained values of the hydrogen diffusion coefficient D<sub>H</sub>
, varies between 2.1×10<sup>-7</sup>
and 8.2×10<sup>-9</sup>
cm<sup>2</sup>
s<sup>-1</sup>
depending on the iron content of the electrode.</div>
</front>
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<li>Tunisie</li>
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<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>
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<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>
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