Intercalation stage dependence of core electronic excitations in Li-intercalated graphite from inelastic X-ray scattering

被引：11

作者：

Stutz, G. E. ^{[1
,2
]}

Otero, M. ^{[3
,4
]}

Ceppi, S. A. ^{[1
,2
]}

Robledo, C. B. ^{[3
,4
]}

Luque, G. ^{[3
,4
]}

Leiva, E. ^{[3
,4
]}

Barraco Diaz, D. E. ^{[1
,2
]}

机构：

[1] Univ Nacl Cordoba, Fac Matemat Astron Fis & Computec FaMAF, RA-5000 Cordoba, Argentina

[2] CONICET UNC, IFEG, FaMAF, RA-5000 Cordoba, Argentina

[3] Univ Nacl Cordoba, FCQ, Dept Quim Teot & Computac, RA-5000 Cordoba, Argentina

[4] CONICET UNC, FCQ, INFIQC, RA-5000 Cordoba, Argentina

来源：

APPLIED PHYSICS LETTERS | 2017年 / 110卷 / 25期

关键词：

INTERLAYER STATES; LITHIUM-GRAPHITE; IN-SITU; SYNCHROTRON; BAND; SPECTROSCOPY; BATTERIES; EDGE;

D O I：

10.1063/1.4986922

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Li and C 1s core-electron excitation spectra of electrochemically prepared stage-II and stage-I lithiated graphite were investigated by means of inelastic X-ray scattering spectroscopy. The near-edge structure is discussed, and the spectral features are interpreted using ab initio calculations. Our results confirm the invariance of the excitation threshold for transitions from C 1s core-states to empty pi* states upon Li intercalation for stage-I and show this invariance also occurs for the second stage of intercalation. A systematic shift of the sigma* excitation threshold to lower energies with the Li content was observed. The Li core spectra reveal an ionic character of the intercalated Li in stage-I and in stage-II. The present results provide further valuable information for forthcoming in situ studies of lithiation/delithiation processes in graphite anodes by inelastic X-ray scattering spectroscopy. Published by AIP Publishing.

引用

页数：5

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