title: ¹¹⁹Sn Mössbauer spectroscopy study of the mechanism of lithium reaction with self-organized Ti₁/₂Sn₁/₂O₂ nanotubes.
abstract: 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.
authors.affiliation: CNRS, LAAS, 7 avenue du Colonel Roche, F-31077 Toulouse, France. ankyerem@laas.fr akyereman@gmail.com.
authors.forename: N A
authors.initials: NA
authors.lastname: Kyeremateng
authors.forename: M-T
authors.initials: MT
authors.lastname: Sougrati
authors.forename: J-C
authors.initials: JC
authors.lastname: Jumas
authors.forename: H
authors.initials: H
authors.lastname: Martinez