<sup>6</sup>Li MAS NMR investigation of electrochemical lithiation of RuO<sub>2</sub>: evidence for an interfacial storage mechanism
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | BEKAERT, Emilie | |
| hal.structure.identifier | Department of Mechanical Engineering [Singapore] | |
| dc.contributor.author | BALAYA, Palani | |
| hal.structure.identifier | Max Planck Institute for Solid State Research | |
| dc.contributor.author | MURUGAVEL, Sevi | |
| hal.structure.identifier | Max Planck Institute for Solid State Research | |
| dc.contributor.author | MAIER, Joachim | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | MÉNÉTRIER, Michel | |
| dc.date.issued | 2009 | |
| dc.identifier.issn | 0897-4756 | |
| dc.description.abstractEn | Nanocrystalline RuO<sub>2</sub> was electrochemically lithiated using a <sup>6</sup>Li-enriched negative electrode, and selected samples at various states of lithiation-delithiation were characterized ex situ by <sup>6</sup>Li magic-angle spinning nuclear magnetic resonance (<sup>6</sup>Li MAS NMR). In the first plateau (up to one Li per RuO<sub>2</sub>), a signal with considerable shift and loss of intensity is observed, showing a strongly paramagnetic character for the LiRuO<sub>2</sub> phase. A signal due to solid electrolyte interphase (SEI) appears at 0 ppm on this first plateau, but significantly grows only on the subsequent conversion plateau (from 1 to 4 Li/RuO<sub>2</sub>). Li<sub>2</sub>O is detected only at the very end of the latter plateau. On further lithiation (4 to 5.5 Li/RuO<sub>2</sub>), the magnitude of the Li<sub>2</sub>O signal remains constant, and a new signal at 4 ppm appears, that we can assign to interfacial Li hypothesized earlier in this system. Upon subsequent delithiation, NMR shows that the interfacial Li first disappears, then Li<sub>2</sub>O also disappears, and the reconstructed Li-RuO<sub>2</sub> phase is clearly different from the one formed during the initial lithiation of RuO<sub>2</sub>. Besides, the SEI signal slightly changes but does not decrease in magnitude upon delithiation. NMR results are in satisfactory agreement with the characteristic features of the proposed “job-sharing” mechanism. | |
| dc.language.iso | en | |
| dc.publisher | American Chemical Society | |
| dc.subject.en | Electrochemistry | |
| dc.subject.en | NMR | |
| dc.subject.en | Storage | |
| dc.subject.en | Mechanism | |
| dc.subject.en | Inorganic compound | |
| dc.subject.en | Ruthenium | |
| dc.title.en | <sup>6</sup>Li MAS NMR investigation of electrochemical lithiation of RuO<sub>2</sub>: evidence for an interfacial storage mechanism | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1021/cm8028005 | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | Chemistry of Materials | |
| bordeaux.page | 856-861 | |
| bordeaux.volume | 21 | |
| bordeaux.issue | 5 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00385837 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00385837v1 | |
| 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=5&rft.spage=856-861&rft.epage=856-861&rft.eissn=0897-4756&rft.issn=0897-4756&rft.au=BEKAERT,%20Emilie&BALAYA,%20Palani&MURUGAVEL,%20Sevi&MAIER,%20Joachim&M%C3%89N%C3%89TRIER,%20Michel&rft.genre=article |
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