Electrochemical study of cobalt-free AB5-type hydrogen storage alloys
Identifieur interne : 000216 ( France/Analysis ); précédent : 000215; suivant : 000217Electrochemical study of cobalt-free AB5-type hydrogen storage alloys
Auteurs : C. Khaldi [Tunisie] ; H. Mathlouthi [Tunisie] ; Jilani Lamloumi [Tunisie] ; A. Percheron-Guegan [France]Source :
- International journal of hydrogen energy [ 0360-3199 ] ; 2004.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Hydrogène.
English descriptors
- KwdEn :
Abstract
Cobalt-free AB5-type hydrogen storage alloys have been examined for the purpose of lowering MH raw material costs. The electrochemical measurements showed that the cobalt-containing LaNi3.55Mn0.4Al0.3Co0.75 alloy had a maximum capacity of 300 mA h/g at a rate of C/6. The capacity decrease was calculated by 5% after 20 cycles at C/6 rate with 100% depth of discharge (DOD). The cobalt-free LaNi3.55Mn0.4Al0.3Fe0.75 alloy showed a very good cycling stability, although the initial capacity (250 mA h/g at C/6 rate) was lower than that of the cobalt containing alloy. The capacity decrease of the cobalt-free alloy amounted to 1% after 20 cycles under the same rate and DOD. The mechanism of hydriding/dehydriding reaction on the alloy electrodes was also investigated using a constant potential discharge (CPD) and cyclic voltammetry (CV) techniques. The obtained values of the hydrogen diffusion coefficient DH, were, 2 x 10-8 and 1.1 x 10-10 cm2 s-1 for LaNi3.55Mn0.4Al0.3Co0.75 and 8 × 10-9 and 1.0 x 10-10 cm2 s-1 for LaNi3.55Mn0.4Al0.3Fe0.75, by CV and by CPD, respectively.
Affiliations:
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Pascal:04-0240210Le document en format XML
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Khaldi</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>LMMP, 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, H" sort="Mathlouthi, H" uniqKey="Mathlouthi H" first="H." last="Mathlouthi">H. Mathlouthi</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>LMMP, 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, J" sort="Lamloumi, J" uniqKey="Lamloumi J" first="J." last="Lamloumi">Jilani Lamloumi</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>LMMP, 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><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>LCMTR, GLVT, CNRS, 2-8 Rue Henri Dunant</s1><s2>94320 Thiais</s2><s3>FRA</s3><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></analytic><series><title level="j" type="main">International journal of hydrogen energy</title><title level="j" type="abbreviated">Int. j. hydrogen energy</title><idno type="ISSN">0360-3199</idno><imprint><date when="2004">2004</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">International journal of hydrogen energy</title><title level="j" type="abbreviated">Int. j. hydrogen energy</title><idno type="ISSN">0360-3199</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Aluminium alloy</term><term>Cost lowering</term><term>Cyclic voltammetry</term><term>Hydrogen</term><term>Hydrogen storage</term><term>Lanthanum alloy</term><term>Manganèse alloy</term><term>Nickel alloy</term><term>Stability</term><term>Storage capacity</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Hydrogène</term><term>Stockage hydrogène</term><term>Lanthane alliage</term><term>Nickel alliage</term><term>Manganèse alliage</term><term>Aluminium alliage</term><term>Capacité stockage</term><term>Diminution coût</term><term>Stabilité</term><term>Voltammétrie cyclique</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Hydrogène</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Cobalt-free AB<sub>5</sub>-type hydrogen storage alloys have been examined for the purpose of lowering MH raw material costs. The electrochemical measurements showed that the cobalt-containing LaNi<sub>3.55</sub>Mn<sub>0.4</sub>Al<sub>0.3</sub>Co<sub>0.75</sub> alloy had a maximum capacity of 300 mA h/g at a rate of C/6. The capacity decrease was calculated by 5% after 20 cycles at C/6 rate with 100% depth of discharge (DOD). The cobalt-free LaNi<sub>3.55</sub>Mn<sub>0.4</sub>Al<sub>0.3</sub>Fe<sub>0.75</sub> alloy showed a very good cycling stability, although the initial capacity (250 mA h/g at C/6 rate) was lower than that of the cobalt containing alloy. The capacity decrease of the cobalt-free alloy amounted to 1% after 20 cycles under the same rate and DOD. The mechanism of hydriding/dehydriding reaction on the alloy electrodes was also investigated using a constant potential discharge (CPD) and cyclic voltammetry (CV) techniques. The obtained values of the hydrogen diffusion coefficient D<sub>H</sub>, were, 2 x 10<sup>-8</sup> and 1.1 x 10<sup>-10</sup> cm<sup>2</sup> s<sup>-1</sup> for LaNi<sub>3.55</sub>Mn<sub>0.4</sub>Al<sub>0.3</sub>Co<sub>0.75</sub> and 8 × 10<sup>-9</sup> and 1.0 x 10<sup>-10</sup> cm<sup>2</sup> s<sup>-1</sup> for LaNi<sub>3.55</sub>Mn<sub>0.4</sub>Al<sub>0.3</sub>Fe<sub>0.75</sub>, by CV and by CPD, respectively.</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>Thiais</li><li>Tunis</li></settlement><orgName><li>Université de Tunis</li></orgName></list><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></region><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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