作者: C. Pérez Vicente , C. Bousquet , A. Krämer , J.L. Tirado , J. Olivier-Fourcade
关键词: X-ray crystallography 、 Mössbauer spectroscopy 、 Electronic band structure 、 Delocalized electron 、 Spectroscopy 、 Rietveld refinement 、 Spinel 、 Analytical chemistry 、 Lithium 、 Crystallography 、 Chemistry
摘要: The authors have studied the structural modifications that occur during electrochemical insertion of lithium into spinel compound In{sub 16}Fe{sub 8}S{sub 32}. Studies by X-ray diffraction (Rietveld analysis) and Moessbauer spectroscopy lithiated products indicate some cation migration takes place process. spectra show no reduction Fe{sup 2+} insertion. variation isomer shift indicates an increase in covalency network. results absorption experiments absence a clear In{sup 3+} incorporation incoming electrons delocalized band structure. Analysis discharge curve shows presence two different domains. For first one there is small interaction between inserted ions. second repulsive decrease diffusion coefficient.