LiAlyCo1-yO2 (0.0 ≤ y ≤ 0.3) intercalation compounds synthesized from the citrate precursors
Identifieur interne : 000233 ( France/Analysis ); précédent : 000232; suivant : 000234LiAlyCo1-yO2 (0.0 ≤ y ≤ 0.3) intercalation compounds synthesized from the citrate precursors
Auteurs : N. Amdouni [Tunisie] ; H. Zarrouk [Tunisie] ; F. Soulette [France] ; C. Julien [France]Source :
- Materials chemistry and physics [ 0254-0584 ] ; 2003.
Descripteurs français
- Pascal (Inist)
English descriptors
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Abstract
We present the synthesis, characterization and electrode behaviour ofLiAlyCo1-yO2(0.0 ≤ y ≤ 0.3) oxides prepared by the citrate route. The phase evolution was studied as a function of the aluminium substitution and the modification on the intercalation and deintercalation of Li ions. Characterization methods include X-ray powder diffraction (XRD), thermogravimetry analysis (TG-DTA), scanning electron microscopy (SEM), Raman scattering (RS) and Fourier transform infrared (FTIR) spectroscopy. Samples belong to the LiCoO2-LiAlO2 solid solution and have the layered α-NaFeO2 structure (R3m space group). Raman scattering and FT-infrared vibrational spectroscopies indicate that the vibrational mode frequencies and relative intensities of the bands are sensitive to the covalency of the (Co, Al)O2 slabs. SEM micrographs show that the particle size of the LiAlyCo1-yO2powders ranges in the submicronic domain with a narrow grain-size distribution. The overall electrochemical capacity of the LiAlyCo1-yO2 oxides have been reduced due to the sp metal substitution, however, a more stable charge-discharge cycling performances have been observed when electrodes are charged up to 4.3V as compared to the performance of the native oxide. For such a cut-off voltage, the charge capacity of the Li//LiAl0.2Co0.8O2 cell is ca. 118 mAh g-1. Kinetics were characterized by the galvanostatic intermittent titration technique (GITT). Aluminium substitution provides an increase of the chemical diffusion coefficients ofLi+ ions in the LiAly Co1-yO2 matrix. Differences and similarities between LiCoO2 and Al-substituted oxides are discussed therefrom.
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Pascal:03-0305472Le document en format XML
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Amdouni</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratoire de Chimie des Matériaux, Faculté des Sciences de Tunis Université de Tunis El Manar Campus Universitaire</s1><s2>2092 El Manar II</s2><s3>TUN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Tunisie</country><wicri:noRegion>2092 El Manar II</wicri:noRegion></affiliation></author><author><name sortKey="Zarrouk, H" sort="Zarrouk, H" uniqKey="Zarrouk H" first="H." last="Zarrouk">H. Zarrouk</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratoire de Chimie des Matériaux, Faculté des Sciences de Tunis Université de Tunis El Manar Campus Universitaire</s1><s2>2092 El Manar II</s2><s3>TUN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Tunisie</country><wicri:noRegion>2092 El Manar II</wicri:noRegion></affiliation></author><author><name sortKey="Soulette, F" sort="Soulette, F" uniqKey="Soulette F" first="F." last="Soulette">F. Soulette</name><affiliation wicri:level="4"><inist:fA14 i1="02"><s1>Laboratoire des Milieux Désordonnés et Hétérogènes, CNRS-UMR7603, Université Pierre et Marie Curie, 4 place Jussieu, case 86</s1><s2>75252 Paris</s2><s3>FRA</s3><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Île-de-France</region><settlement type="city">Paris</settlement></placeName><orgName type="university">Université Pierre-et-Marie-Curie</orgName></affiliation></author><author><name sortKey="Julien, C" sort="Julien, C" uniqKey="Julien C" first="C." last="Julien">C. Julien</name><affiliation wicri:level="4"><inist:fA14 i1="02"><s1>Laboratoire des Milieux Désordonnés et Hétérogènes, CNRS-UMR7603, Université Pierre et Marie Curie, 4 place Jussieu, case 86</s1><s2>75252 Paris</s2><s3>FRA</s3><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Île-de-France</region><settlement type="city">Paris</settlement></placeName><orgName type="university">Université Pierre-et-Marie-Curie</orgName></affiliation></author></analytic><series><title level="j" type="main">Materials chemistry and physics</title><title level="j" type="abbreviated">Mater. chem. phys.</title><idno type="ISSN">0254-0584</idno><imprint><date when="2003">2003</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Materials chemistry and physics</title><title level="j" type="abbreviated">Mater. chem. phys.</title><idno type="ISSN">0254-0584</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Aluminium oxides</term><term>Chemical synthesis</term><term>Citrates</term><term>Cobalt oxides</term><term>Crystal structure</term><term>DTA</term><term>Experimental study</term><term>Intercalation compounds</term><term>Lithium battery</term><term>Lithium oxides</term><term>Quaternary compounds</term><term>Scanning electron microscopy</term><term>XRD</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Composé insertion</term><term>Citrate</term><term>Synthèse chimique</term><term>Lithium oxyde</term><term>Aluminium oxyde</term><term>Cobalt oxyde</term><term>Composé quaternaire</term><term>Batterie lithium</term><term>ATD</term><term>Microscopie électronique balayage</term><term>Etude expérimentale</term><term>Structure cristalline</term><term>Diffraction RX</term><term>8120K</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">We present the synthesis, characterization and electrode behaviour ofLiAl<sub>y</sub>Co<sub>1-y</sub>O<sub>2</sub>(0.0 ≤ y ≤ 0.3) oxides prepared by the citrate route. The phase evolution was studied as a function of the aluminium substitution and the modification on the intercalation and deintercalation of Li ions. Characterization methods include X-ray powder diffraction (XRD), thermogravimetry analysis (TG-DTA), scanning electron microscopy (SEM), Raman scattering (RS) and Fourier transform infrared (FTIR) spectroscopy. Samples belong to the LiCoO<sub>2</sub>-LiAlO<sub>2</sub> solid solution and have the layered α-NaFeO<sub>2</sub> structure (R3m space group). Raman scattering and FT-infrared vibrational spectroscopies indicate that the vibrational mode frequencies and relative intensities of the bands are sensitive to the covalency of the (Co, Al)O<sub>2</sub> slabs. SEM micrographs show that the particle size of the LiAl<sub>y</sub>Co<sub>1-y</sub>O<sub>2</sub>powders ranges in the submicronic domain with a narrow grain-size distribution. The overall electrochemical capacity of the LiAl<sub>y</sub>Co<sub>1-y</sub>O<sub>2</sub> oxides have been reduced due to the sp metal substitution, however, a more stable charge-discharge cycling performances have been observed when electrodes are charged up to 4.3V as compared to the performance of the native oxide. For such a cut-off voltage, the charge capacity of the Li//LiAl<sub>0.2</sub>Co<sub>0.8</sub>O<sub>2</sub> cell is ca. 118 mAh g<sup>-1</sup>. Kinetics were characterized by the galvanostatic intermittent titration technique (GITT). Aluminium substitution provides an increase of the chemical diffusion coefficients ofLi<sup>+</sup> ions in the LiAl<sub>y</sub> Co<sub>1-y</sub>O<sub>2</sub> matrix. Differences and similarities between LiCoO<sub>2</sub> and Al-substituted oxides are discussed therefrom.</div></front></TEI><affiliations><list><country><li>France</li><li>Tunisie</li></country><region><li>Île-de-France</li></region><settlement><li>Paris</li></settlement><orgName><li>Université Pierre-et-Marie-Curie</li></orgName></list><tree><country name="Tunisie"><noRegion><name sortKey="Amdouni, N" sort="Amdouni, N" uniqKey="Amdouni N" first="N." last="Amdouni">N. Amdouni</name></noRegion><name sortKey="Zarrouk, H" sort="Zarrouk, H" uniqKey="Zarrouk H" first="H." last="Zarrouk">H. Zarrouk</name></country><country name="France"><region name="Île-de-France"><name sortKey="Soulette, F" sort="Soulette, F" uniqKey="Soulette F" first="F." last="Soulette">F. Soulette</name></region><name sortKey="Julien, C" sort="Julien, C" uniqKey="Julien C" first="C." last="Julien">C. Julien</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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