Resonant inelastic X-ray scattering and X-ray absorption spectroscopy on the negative electrode material Li0.5Ni0.25TiOPO 4 in a Li-ion battery

H. M. Hollmark, Kenza Maher, I. Saadoune, T. Gustafsson, K. Edström, L. C. Duda

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

We have studied the first lithiation/delithiation cycle of the Li-ion battery electrode material LixNi0.25TiOPO4 applying X-ray absorption spectroscopy (XAS) and resonant inelastic X-ray scattering (RIXS). A set of ten identical LixNi 0.25TiOPO4 battery electrodes have been cycled and left in different states of charge in the range of x = 0.5 ... 2.5, before disassembly in an Ar filled glove box. We find that Ni-, Ti-, and O-ions are affected simultaneously, rather than sequentially, upon lithiation of the material. In particular, Ni is reduced from Ni2+ to Ni0 but only partially re-oxidized to Ni1+, again, by delithiation. Overall, there is considerable "crosstalk" between the different atomic species and non-linearity in the response of the electronic structure during the lithiation/delithiation process. Fortuitously, the background variation in Ni L-XAS shows to contain valuable information about solid-electrolyte interface (SEI) creation, showing that the SEI is a function of the degree of lithiation.

Original languageEnglish
Pages (from-to)6544-6551
Number of pages8
JournalPhysical Chemistry Chemical Physics
Volume13
Issue number14
DOIs
Publication statusPublished - 14 Apr 2011
Externally publishedYes

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X-Ray Absorption Spectroscopy
Inelastic scattering
X ray absorption spectroscopy
Solid electrolytes
electrode materials
X ray scattering
Electrolytes
electric batteries
absorption spectroscopy
Electrodes
X-Rays
solid electrolytes
Ions
Crosstalk
scattering
gloves
Electronic structure
ions
x rays
crosstalk

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Resonant inelastic X-ray scattering and X-ray absorption spectroscopy on the negative electrode material Li0.5Ni0.25TiOPO 4 in a Li-ion battery. / Hollmark, H. M.; Maher, Kenza; Saadoune, I.; Gustafsson, T.; Edström, K.; Duda, L. C.

In: Physical Chemistry Chemical Physics, Vol. 13, No. 14, 14.04.2011, p. 6544-6551.

Research output: Contribution to journalArticle

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