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hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
hal.structure.identifierDirection de la recherche
dc.contributor.authorDOUIN, Myriam
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorGUERLOU-DEMOURGUES, Liliane
hal.structure.identifierDirection de la recherche
dc.contributor.authorGOUBAULT, Lionel
hal.structure.identifierDirection de la recherche
dc.contributor.authorBERNARD, Patrick
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDELMAS, Claude
dc.date.issued2009
dc.identifier.issn0013-4651
dc.description.abstractEnThe<sup> </sup>stability of the Na<sub>0.6</sub>CoO<sub>2</sub> phase, as intended to be used<sup> </sup>as a conductive additive at the positive electrode of Ni–MH<sup> </sup>batteries, was tested in electrochemical cycling conditions, in KOH alkaline<sup> </sup>electrolyte. Simple aging of Na<sub>0.6</sub>CoO<sub>2</sub> in the electrolyte entails its<sup> </sup>spontaneous transformation into a mixture of y and B(III) cobalt oxyhydroxides. This reaction, occurring within the solid state, is based<sup> </sup>on an original mechanism, which involves cationic exchange processes and<sup> </sup>passes through an intermediate interstratified phase. Electrochemical oxidation of Na<sub>0.6</sub>CoO<sub>2</sub><sup> </sup>in the alkaline electrolyte, as well as chemical oxidation, leads<sup> </sup>to a y cobalt oxyhydroxide, which can be totally reduced<sup> </sup>to B(III), depending on the reduction conditions. It is important<sup> </sup>to understand such an evolution mechanism of the Na<sub>0.6</sub>CoO<sub>2</sub> additive<sup> </sup>because it will have a significant and positive influence on<sup> </sup>the electrochemical cycling of the positive electrode in specific deep<sup> </sup>discharge or low potential storage conditions.
dc.language.isoen
dc.publisherElectrochemical Society
dc.subject.enAgeing
dc.subject.enElectrochemical electrodes
dc.subject.enElectrolytes
dc.subject.enIon exchange
dc.subject.enNickel compounds
dc.subject.enOxidation
dc.subject.enReduction (chemical)
dc.subject.enSecondary cells
dc.subject.enSodium compounds
dc.title.enEvolution mechanism of the Na<sub>0.6</sub>CoO<sub>2</sub> conductive additive during cycling in the alkaline electrolyte of Ni–MH batteries
dc.typeArticle de revue
dc.identifier.doi10.1149/1.3111842
dc.subject.halChimie/Matériaux
bordeaux.journalJournal of The Electrochemical Society
bordeaux.pageA459-A467
bordeaux.volume156
bordeaux.issue6
bordeaux.peerReviewedoui
hal.identifierhal-00388983
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00388983v1
bordeaux.COinSctx_ver=Z39.88-2004&amp;rft_val_fmt=info:ofi/fmt:kev:mtx:journal&amp;rft.jtitle=Journal%20of%20The%20Electrochemical%20Society&amp;rft.date=2009&amp;rft.volume=156&amp;rft.issue=6&amp;rft.spage=A459-A467&amp;rft.epage=A459-A467&amp;rft.eissn=0013-4651&amp;rft.issn=0013-4651&amp;rft.au=DOUIN,%20Myriam&amp;GUERLOU-DEMOURGUES,%20Liliane&amp;GOUBAULT,%20Lionel&amp;BERNARD,%20Patrick&amp;DELMAS,%20Claude&amp;rft.genre=article


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