Improvement by heating of the electronic conductivity of cobalt spinel phases, electrochemically synthesized in various electrolytes
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| hal.structure.identifier | Direction de la recherche | |
| dc.contributor.author | DOUIN, Myriam | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | GUERLOU-DEMOURGUES, Liliane | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | MÉNÉTRIER, Michel | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | BEKAERT, Emilie | |
| hal.structure.identifier | Direction de la recherche | |
| dc.contributor.author | GOUBAULT, Lionel | |
| hal.structure.identifier | Direction de la recherche | |
| dc.contributor.author | BERNARD, Patrick | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | DELMAS, Claude | |
| dc.date.issued | 2009 | |
| dc.identifier.issn | 0022-4596 | |
| dc.description.abstractEn | The nature of the alkaline electrolyte (based on KOH, NaOH, LiOH), in which Co<sub>3</sub>O<sub>4</sub> spinel type phases are synthesized by electrooxidation of CoO, is shown to play a key role on the composition, the structure and the electronic conductivity of the materials. In the materials, prepared in pure LiOH electrolyte or in mixed ternary electrolyte (KOH, NaOH, LiOH), Co<sup>4+</sup> ions are present in the octahedral framework, which entails electronic delocalization in the cobalt <i>T</i><sub>2</sub><i><sub>g</sub></i> band and a high conductivity. The structure of the sample, synthesized in KOH, is on the opposite closer to that of ideal Co<sub>3</sub>O<sub>4</sub>, with only Co<sup>3+</sup> in the octahedral sublattice, which leads to a semi-conducting behavior. Whatever the initial material, a thermal treatment induces an increase of the Co<sup>4+</sup>/Co<sup>3+</sup> ratio in the octahedral network, resulting in a significant increase of the electronic conductivity. | |
| dc.language.iso | en | |
| dc.publisher | Elsevier | |
| dc.subject.en | Spinel | |
| dc.subject.en | Cobalt oxide | |
| dc.subject.en | Electronic conductivity | |
| dc.subject.en | Alkaline battery | |
| dc.title.en | Improvement by heating of the electronic conductivity of cobalt spinel phases, electrochemically synthesized in various electrolytes | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1016/j.jssc.2009.02.018 | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | Journal of Solid State Chemistry | |
| bordeaux.page | 1273-1280 | |
| bordeaux.volume | 182 | |
| bordeaux.issue | 5 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00382826 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00382826v1 | |
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