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Probing Al distribution in LiCo0.96Al0.04O2 materials using 7Li, 27Al, and 59Co MAS NMR combined with synchrotron X-ray diffraction

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
hal.structure.identifierUMICORE
dc.contributor.authorDUFFIET, Marie
hal.structure.identifierUMICORE
dc.contributor.authorBLANGERO, Maxime
hal.structure.identifierUMICORE
dc.contributor.authorCABELGUEN, Pierre Etienne
hal.structure.identifierUMICORE
dc.contributor.authorSONG, Kyeong Se
hal.structure.identifierALBA Synchrotron light source [Barcelone]
dc.contributor.authorFAUTH, François
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDELMAS, Claude
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorCARLIER, Dany
dc.date.issued2020
dc.identifier.issn0020-1669
dc.description.abstractEnWe prepared Al-doped LCO (LCA) powders with low Al content (4%) with a controlled Li/(Co + Al) stoichiometry by a solid-state reaction using Li2CO3 and two types of Co/Al precursors: simply mixed (Co3O4 and Al2O3) or heat-treated (Co3O4 and Al2O3). These samples were thereby used to propose a reliable protocol with the aim to discuss the homogeneity of the Al doping for LiCo1–yAlyO2 (LCA) prepared with low Al content by evidencing the distribution of Al within the powders, which clearly affects the electrochemical profiles of associated LCA//Li cells. For all samples we initially also characterized the Li/(Co + Al) stoichiometry by 7Li MAS NMR, to discard the possible effect of excess Li in the samples. Synchrotron XRD combined with 27Al and 59Co MAS NMR then provided a deep understanding of the doping homogeneity at the powder or particle scale. We showed that doping the Co3O4 spinel precursor by reacting it with Al2O3 may be avoided, as it most likely leads to an inhomogeneous mixture of Co3O4 and Co3–zAlzO4 as precursor, eventually reflecting in the final LiCo0.96Al0.04O2 powder, which shows a nonhomogeneous Al distribution. We believe that such a detailed characterization should be the first step toward a deeper understanding of the real beneficial effect(s) of Al doping on the high voltage performance of LCO.
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.title.enProbing Al distribution in LiCo0.96Al0.04O2 materials using 7Li, 27Al, and 59Co MAS NMR combined with synchrotron X-ray diffraction
dc.typeArticle de revue
dc.identifier.doi10.1021/acs.inorgchem.9b03260
dc.subject.halChimie/Matériaux
dc.subject.halChimie/Chimie inorganique
bordeaux.journalInorganic Chemistry
bordeaux.page2890-2899
bordeaux.volume59
bordeaux.issue5
bordeaux.peerReviewedoui
hal.identifierhal-02508078
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02508078v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Inorganic%20Chemistry&rft.date=2020&rft.volume=59&rft.issue=5&rft.spage=2890-2899&rft.epage=2890-2899&rft.eissn=0020-1669&rft.issn=0020-1669&rft.au=DUFFIET,%20Marie&BLANGERO,%20Maxime&CABELGUEN,%20Pierre%20Etienne&SONG,%20Kyeong%20Se&FAUTH,%20Fran%C3%A7ois&rft.genre=article


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