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Stacking faults in an O2-type cobalt-free lithium-rich layered oxide: mechanisms of the ion exchange reaction and lithium electrochemical (de)intercalation

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorSAÏBI, Valentin
hal.structure.identifierToyota Motor Europe
dc.contributor.authorCASTRO, Laurent
hal.structure.identifierToyota Motor Corporation (JAPAN)
dc.contributor.authorSUGIYAMA, Issei
hal.structure.identifierSynchrotron SOLEIL [SSOLEIL]
dc.contributor.authorBELIN, Stéphanie
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.authorGUIGNARD, Marie
dc.date2023
dc.date.issued2023
dc.identifier.issn0897-4756
dc.description.abstractEnThe metastable O2-type cobalt-free lithium-rich layered oxide Li0.84Ni0.14Mn0.72O2 was successfully prepared by a new all solid-state ion-exchange reaction from the P2-type sodium layered oxide precursor Na0.7[Li0.14Ni0.14Mn0.72]O2 using lithium chloride at moderate temperature. The particular oxygen stacking in the resulting O2-type structure is assumed to suppress the detrimental layer-to-spinel phase transition usually observed upon cycling in conventional O3-type lithium-rich layered oxides due to the irreversible migration of transition metal cations, causing substantial voltage decay and capacity fading. Despite the existence of stacking faults originating from the P2-to-O2 topotactic reaction during the Na+-to-Li+ exchange, evidenced by X-ray diffraction simulation and high-resolution microcopy, the electrochemical tests conducted on the faulted O2-type positive electrode material revealed a greatly improved reversible (de)intercalation mechanism along with high specific capacity values. An operando X-ray diffraction study indicated that there are only small structural changes upon cycling and that they are stable and reversible. Moreover, operando X-ray absorption spectroscopy experiments showed that a large part of the capacity relies on the oxygen redox which is also reversible upon cycling.
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.title.enStacking faults in an O2-type cobalt-free lithium-rich layered oxide: mechanisms of the ion exchange reaction and lithium electrochemical (de)intercalation
dc.typeArticle de revue
dc.identifier.doi10.1021/acs.chemmater.3c01426
dc.subject.halChimie/Matériaux
bordeaux.journalChemistry of Materials
hal.identifierhal-04212604
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-04212604v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Chemistry%20of%20Materials&rft.date=2023&rft.eissn=0897-4756&rft.issn=0897-4756&rft.au=SA%C3%8FBI,%20Valentin&CASTRO,%20Laurent&SUGIYAMA,%20Issei&BELIN,%20St%C3%A9phanie&DELMAS,%20Claude&rft.genre=article


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