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XPS and Raman spectroscopic characterization of LiMn 2 O 4 spinels
Author(s) -
Ramana C. V.,
Massot M.,
Julien C. M.
Publication year - 2005
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.2022
Subject(s) - manganese , x ray photoelectron spectroscopy , raman spectroscopy , spinel , octahedron , lithium (medication) , oxidation state , chemistry , stoichiometry , ion , inorganic chemistry , raman scattering , crystallography , materials science , crystal structure , nuclear magnetic resonance , metal , metallurgy , medicine , physics , organic chemistry , optics , endocrinology
Surface analysis of lithium manganese oxides synthesized by the melt–impregnation method has been made by x‐ray photoelectron spectroscopy. These results revealed the change in the average oxidation state of Mn cations upon lithium substitution in Li 1+δ Mn 2−δ O 4 spinels. Studies of the local structure characterized by Raman scattering show the MnO bonding evolution as a function of the replacement of manganese cations. Modification in the trigonal distortion of MnO 6 octahedra is evidenced by insertion of lithium ions into the octahedral holes of the [B 2 ]O 4 spinel framework. Copyright © 2005 John Wiley & Sons, Ltd.