A delithiated LiNi0.65Co0.25Mn0,10O2 electrode material : A structural, magnetic and electrochemical study
Identifieur interne : 000722 ( Main/Curation ); précédent : 000721; suivant : 000723A delithiated LiNi0.65Co0.25Mn0,10O2 electrode material : A structural, magnetic and electrochemical study
Auteurs : Mohammed Dahbi [Maroc] ; J. Magnus Wikberg [Suède] ; Ismael Saadoune [Maroc] ; Torbjörn Gustafsson [Suède] ; Peter Svedlindh [Suède] ; Kristina Edström [Suède]Source :
- Electrochimica acta [ 0013-4686 ] ; 2009.
Descripteurs français
- Pascal (Inist)
- Matériau électrode, Préparation, Cathode, Aimantation, Cyclage, Lithium Oxyde, Nickel Oxyde, Cobalt Oxyde, Manganèse Oxyde, Composé n éléments, Capacité spécifique, Décharge, Diffraction RX, Structure lamellaire, Accumulateur électrochimique, Propriété magnétique, Caractéristique électrique, Batterie lithium ion.
English descriptors
- KwdEn :
- Cathode, Cobalt Oxides, Cycling, Discharge, Electrical characteristic, Electrode material, Lamellar structure, Lithion ion batteries, Lithium Oxides, Magnetic properties, Magnetization, Manganese Oxides, Multi-element compound, Nickel Oxides, Preparation, Secondary cell, Specific capacity, X ray diffraction.
Abstract
A crystalline LiNi0.65Co0.25Mn0.10O2 electrode material was synthesized by the combustion method at 900°C for 1 h. Rietveld refinement shows less than 3% of Li/Ni disorder in the structure. Lithium extraction involves only the Ni2+/Ni4+ redox couple while Co3+ and Mn4+ remain electrochemically inactive. No structural transition was detected during cycling in the whole composition range 0 < x < 1.0. Furthermore, the hexagonal cell volume changes by only 3% when all lithium was removed indicating a good mechanical stability ofthe studied compound. LiNi0.65Co0.25Mn0.10O2 has a discharge capacity of 150 mAh/g in the voltage range 2.5-4.5 V, but the best electrochemical performance was obtained with an upper cut-off potential of 4.3 V. Magnetic measurements reveal competing antiferromagnetic and ferromagnetic interactions - varying in strength as a function of lithium content - yielding a low temperature magnetically frustrated state. The evolution of the magnetic properties with lithium content confirms the preferential oxidation of Ni ions compared to Co3+ and Mn4+ during the delithiation process.
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Pascal:09-0282983Le document en format XML
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Co<sub>0.25</sub>
Mn<sub>0,10</sub>
O<sub>2</sub>
electrode material : A structural, magnetic and electrochemical study</title>
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">A delithiated LiNi<sub>0.65</sub>
Co<sub>0.25</sub>
Mn<sub>0,10</sub>
O<sub>2</sub>
electrode material : A structural, magnetic and electrochemical study</title>
<author><name sortKey="Dahbi, Mohammed" sort="Dahbi, Mohammed" uniqKey="Dahbi M" first="Mohammed" last="Dahbi">Mohammed Dahbi</name>
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<sZ>1 aut.</sZ>
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<country>Maroc</country>
<placeName><settlement type="city">Marrakech</settlement>
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<author><name sortKey="Magnus Wikberg, J" sort="Magnus Wikberg, J" uniqKey="Magnus Wikberg J" first="J." last="Magnus Wikberg">J. Magnus Wikberg</name>
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<author><name sortKey="Saadoune, Ismael" sort="Saadoune, Ismael" uniqKey="Saadoune I" first="Ismael" last="Saadoune">Ismael Saadoune</name>
<affiliation wicri:level="3"><inist:fA14 i1="01"><s1>ECME, FST Marrakech, University Cadi Ayyad, BP549, Av. A. Khattabi</s1>
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<placeName><settlement type="city">Marrakech</settlement>
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<author><name sortKey="Gustafsson, Torbjorn" sort="Gustafsson, Torbjorn" uniqKey="Gustafsson T" first="Torbjörn" last="Gustafsson">Torbjörn Gustafsson</name>
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<s3>SWE</s3>
<sZ>4 aut.</sZ>
<sZ>6 aut.</sZ>
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<region nuts="1">East Middle Sweden</region>
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<author><name sortKey="Svedlindh, Peter" sort="Svedlindh, Peter" uniqKey="Svedlindh P" first="Peter" last="Svedlindh">Peter Svedlindh</name>
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<region nuts="1">East Middle Sweden</region>
</placeName>
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<author><name sortKey="Edstrom, Kristina" sort="Edstrom, Kristina" uniqKey="Edstrom K" first="Kristina" last="Edström">Kristina Edström</name>
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<series><title level="j" type="main">Electrochimica acta</title>
<title level="j" type="abbreviated">Electrochim. acta</title>
<idno type="ISSN">0013-4686</idno>
<imprint><date when="2009">2009</date>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Cathode</term>
<term>Cobalt Oxides</term>
<term>Cycling</term>
<term>Discharge</term>
<term>Electrical characteristic</term>
<term>Electrode material</term>
<term>Lamellar structure</term>
<term>Lithion ion batteries</term>
<term>Lithium Oxides</term>
<term>Magnetic properties</term>
<term>Magnetization</term>
<term>Manganese Oxides</term>
<term>Multi-element compound</term>
<term>Nickel Oxides</term>
<term>Preparation</term>
<term>Secondary cell</term>
<term>Specific capacity</term>
<term>X ray diffraction</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Matériau électrode</term>
<term>Préparation</term>
<term>Cathode</term>
<term>Aimantation</term>
<term>Cyclage</term>
<term>Lithium Oxyde</term>
<term>Nickel Oxyde</term>
<term>Cobalt Oxyde</term>
<term>Manganèse Oxyde</term>
<term>Composé n éléments</term>
<term>Capacité spécifique</term>
<term>Décharge</term>
<term>Diffraction RX</term>
<term>Structure lamellaire</term>
<term>Accumulateur électrochimique</term>
<term>Propriété magnétique</term>
<term>Caractéristique électrique</term>
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<front><div type="abstract" xml:lang="en">A crystalline LiNi<sub>0.65</sub>
Co<sub>0.25</sub>
Mn<sub>0.10</sub>
O<sub>2</sub>
electrode material was synthesized by the combustion method at 900°C for 1 h. Rietveld refinement shows less than 3% of Li/Ni disorder in the structure. Lithium extraction involves only the Ni<sup>2+</sup>
/Ni<sup>4+</sup>
redox couple while Co<sup>3+</sup>
and Mn<sup>4+</sup>
remain electrochemically inactive. No structural transition was detected during cycling in the whole composition range 0 < x < 1.0. Furthermore, the hexagonal cell volume changes by only 3% when all lithium was removed indicating a good mechanical stability ofthe studied compound. LiNi<sub>0.65</sub>
Co<sub>0.25</sub>
Mn<sub>0.10</sub>
O<sub>2</sub>
has a discharge capacity of 150 mAh/g in the voltage range 2.5-4.5 V, but the best electrochemical performance was obtained with an upper cut-off potential of 4.3 V. Magnetic measurements reveal competing antiferromagnetic and ferromagnetic interactions - varying in strength as a function of lithium content - yielding a low temperature magnetically frustrated state. The evolution of the magnetic properties with lithium content confirms the preferential oxidation of Ni ions compared to Co<sup>3+</sup>
and Mn<sup>4+</sup>
during the delithiation process.</div>
</front>
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