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Study of the electro-oxidation of CoO and Co(OH)2 at 90 °C in alkaline medium

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorTRONEL, Frédéric
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.issued2008
dc.identifier.issn0378-7753
dc.description.abstractEnCobalt is usually post-added as CoO or Co(OH)2 to nickel hydroxide at the positive electrode (nickel oxide electrode) of alkaline batteries, to form a conductive network. In the present work, we focus on the transformation of CoO and Co(OH)2 phases when oxidized at 90 °C. The Co3O4 phase is the majority product of such a reaction, with CoOOH as a secondary product. It is shown that the Co3O4 phase results from the reaction of the CoOOH phase, formed by electrochemical oxidation of Co(OH)2, with Co2+ species in the electrolyte, which is made possible by temperature. This process requires a global migration of the cobalt phases towards the current collector.
dc.language.isoen
dc.publisherElsevier
dc.subject.enAlkaline batteries
dc.subject.enCobalt oxide
dc.subject.enElectro-oxidation
dc.title.enStudy of the electro-oxidation of CoO and Co(OH)2 at 90 °C in alkaline medium
dc.typeArticle de revue
dc.identifier.doi10.1016/j.jpowsour.2008.01.005
dc.subject.halChimie/Matériaux
bordeaux.journalJournal of Power Sources
bordeaux.page837-847
bordeaux.volume179
bordeaux.issue2
bordeaux.peerReviewedoui
hal.identifierhal-00270303
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00270303v1
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