INVESTIGADORES
OTERO Manuel
artículos
Título:
Intercalation stage dependence of core electronic excitations in Li-intercalated graphite from inelastic X-ray scattering
Autor/es:
STUTZ, G. E.; OTERO, M.; CEPPI, S. A.; ROBLEDO, C. B.; LUQUE, G.; LEIVA, E.; BARRACO DIAZ, D. E.
Revista:
APPLIED PHYSICS LETTERS
Editorial:
AMER INST PHYSICS
Referencias:
Año: 2017 vol. 110
ISSN:
0003-6951
Resumen:
Li and C 1s core-electron excitation spectra of electrochemically prepared stage-II and stage-I lithi-ated graphite were investigated by means of inelastic X-ray scattering spectroscopy. The near-edgestructure is discussed, and the spectral features are interpreted using ab initio calculations. Our resultsconfirm the invariance of the excitation threshold for transitions from C 1s core-states to empty p Ãstates upon Li intercalation for stage-I and show this invariance also occurs for the second stage ofintercalation. A systematic shift of the r à excitation threshold to lower energies with the Li contentwas observed. The Li core spectra reveal an ionic character of the intercalated Li in stage-I and instage-II. The present results provide further valuable information for forthcoming in situ studies oflithiation/delithiation processes in graphite anodes by inelastic X-ray scattering spectroscopy.