(119)Sn Mössbauer spectroscopy study of the mechanism of lithium reaction with self-organized Ti1/2Sn1/2O2 nanotubes. - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Nanoscale Année : 2014

(119)Sn Mössbauer spectroscopy study of the mechanism of lithium reaction with self-organized Ti1/2Sn1/2O2 nanotubes.

Résumé

: Novel self-organized Ti1/2Sn1/2O2 nanotubes can be produced by the electrochemical anodization of co-sputtered Ti-Sn thin-films. Combined X-ray photoelectron spectroscopy and (119)Sn Mössbauer spectroscopy of pristine samples evidenced the octahedral substitution of Sn(4+) for Ti(4+) in the TiO2 structure. In addition to the improved lithium storage behaviour of the Ti1/2Sn1/2O2 nanotubes, ex situ(119)Sn Mössbauer spectroscopy of cycled electrodes has sufficiently confirmed that no decomposition of the Ti1/2Sn1/2O2 structure occurred, and that no Li-Sn phase was formed during the discharge, corroborating that the electrochemical reaction is due exclusively to Li(+) insertion into the Ti1/2Sn1/2O2 nanotubes in the 1 ≤ U/V ≤ 2.6 voltage range.

Domaines

Matériaux
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Dates et versions

hal-01016120 , version 1 (27-06-2014)

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Citer

N. A. Kyeremateng, Moulay Tahar Sougrati, J.-C. Jumas, Hervé Martinez. (119)Sn Mössbauer spectroscopy study of the mechanism of lithium reaction with self-organized Ti1/2Sn1/2O2 nanotubes.. Nanoscale, 2014, 6 (14), pp.7827-7831. ⟨10.1039/c4nr01500b⟩. ⟨hal-01016120⟩
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