Issue 16, 2004
From the journal:

Physical Chemistry Chemical Physics

Solid electrolyte interphase on graphite Li-ion battery anodes studied by soft X-ray spectroscopy

A. Augustsson,*a   M. Herstedt,b   J.-H. Guo,c   K. Edström,b   G. V. Zhuang,d   P. N. Ross, Jr.,d   J.-E. Rubenssona  and  J. Nordgrena  

* Corresponding authors

a Department of Physics, Uppsala University, Box 530, S-75121 Uppsala, Sweden
E-mail: andreas.augustsson@fysik.uu.se

b Department of Materials Chemistry, Uppsala University, P.O. Box 538, S-75121 Uppsala, Sweden

c Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, USA

d Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA

Abstract

We have measured X-ray absorption and emission near the C 1s edge of graphite electrodes cycled in lithium-ion battery cells. Resonantly excited emission spectra of graphite electrodes exhibit features characteristic of both highly oriented pyrolytic graphite as well as polycrystalline graphite. Spectra of three electrodes cycled in two different electrolytes are presented and compared with spectra of the pristine electrode. A solid electrolyte interphase (SEI) was detected on the electrochemically cycled electrodes. By the use of selective excitation, resonant X-ray emission spectra of the SEI-species were obtained and compared to spectra of reference compounds. The SEI on the cycled graphite anode was shown to comprise lithium oxalate (Li2C2O4), lithium succinate (LiO2CCH2CH2CO2Li) and lithium methoxide (LiOCH3).

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Article information

DOI
https://doi.org/10.1039/B313434B
Article type
Paper
Submitted
24 Oct 2003
Accepted
11 Feb 2004
First published
01 Mar 2004

Phys. Chem. Chem. Phys., 2004,6, 4185-4189

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Solid electrolyte interphase on graphite Li-ion battery anodes studied by soft X-ray spectroscopy

A. Augustsson, M. Herstedt, J.-H. Guo, K. Edström, G. V. Zhuang, P. N. Ross, Jr., J.-E. Rubensson and J. Nordgren, Phys. Chem. Chem. Phys., 2004, 6, 4185 DOI: 10.1039/B313434B

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