Possible explanation for the efficiency of Al-based coatings on LiCoO<sub>2</sub>: surface properties of LiCo<sub>1−<i>x</i></sub>Al<sub><i>x</i></sub>O<sub>2</sub> solid solution
| hal.structure.identifier | Institut pluridisciplinaire de recherche sur l'environnement et les matériaux [IPREM] | |
| dc.contributor.author | DAHÉRON, Laurence | |
| hal.structure.identifier | Institut pluridisciplinaire de recherche sur l'environnement et les matériaux [IPREM] | |
| dc.contributor.author | DEDRYVÈRE, Rémi | |
| hal.structure.identifier | Institut pluridisciplinaire de recherche sur l'environnement et les matériaux [IPREM] | |
| dc.contributor.author | MARTINEZ, Hervé | |
| hal.structure.identifier | Institut pluridisciplinaire de recherche sur l'environnement et les matériaux [IPREM] | |
| dc.contributor.author | FLAHAUT, Delphine | |
| 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 | DELMAS, Claude | |
| hal.structure.identifier | Institut pluridisciplinaire de recherche sur l'environnement et les matériaux [IPREM] | |
| dc.contributor.author | GONBEAU, Danielle | |
| dc.date.issued | 2009 | |
| dc.identifier.issn | 0897-4756 | |
| dc.description.abstractEn | Aluminum-based coatings are commonly used in lithium-ion batteries to modify the surface of LiCoO<sub>2</sub> particles, to limit cobalt dissolution in the electrolyte at high voltage. It was shown that the formation of a LiCo<sub>1−<i>x</i></sub>Al<sub><i>x</i></sub>O<sub>2</sub> solid solution occurs at the interface between the coating and the core material. In this paper, we investigated the surface properties of LiCo<sub>1−<i>x</i></sub>Al<sub><i>x</i></sub>O<sub>2</sub> materials by X-ray photoelectron spectroscopy. We explored the surface acid−base properties of these materials by adsorption of gaseous probe molecules (NH<sub>3</sub> and SO<sub>2</sub>) followed by XPS analyses. We showed that the basic character of the LiCo<sub>1−<i>x</i></sub>Al<sub><i>x</i></sub>O<sub>2</sub> surface strongly decreases when <i>x</i> increases, which makes these materials less reactive than LiCoO<sub>2</sub> toward acidic species (such as HF) that are present in LiPF<sub>6</sub>-based electrolytes. This is a possible explanation for the efficiency of Al-based coatings to protect LiCoO<sub>2</sub> against cobalt dissolution in the electrolyte. | |
| dc.language.iso | en | |
| dc.publisher | American Chemical Society | |
| dc.title.en | Possible explanation for the efficiency of Al-based coatings on LiCoO<sub>2</sub>: surface properties of LiCo<sub>1−<i>x</i></sub>Al<sub><i>x</i></sub>O<sub>2</sub> solid solution | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1021/cm901972e | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | Chemistry of Materials | |
| bordeaux.page | 5607-5616 | |
| bordeaux.volume | 21 | |
| bordeaux.issue | 23 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00439565 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00439565v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Chemistry%20of%20Materials&rft.date=2009&rft.volume=21&rft.issue=23&rft.spage=5607-5616&rft.epage=5607-5616&rft.eissn=0897-4756&rft.issn=0897-4756&rft.au=DAH%C3%89RON,%20Laurence&DEDRYV%C3%88RE,%20R%C3%A9mi&MARTINEZ,%20Herv%C3%A9&FLAHAUT,%20Delphine&M%C3%89N%C3%89TRIER,%20Michel&rft.genre=article |
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