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A new look at the solid electrolyte interphase on graphite anodes in Li-ion batteries

Authors :
Marie Herstedt
Kristina Edström
Daniel P. Abraham
Source :
Journal of Power Sources. 153:380-384
Publication Year :
2006
Publisher :
Elsevier BV, 2006.

Abstract

The solid electrolyte interphase (SEI) of graphite electrodes has been extensively studied using surface sensitive techniques such as photoelectron spectroscopy (PES) and soft X-ray spectroscopy. By combining measurements of reference compounds with graphite electrodes cycled in different electrolytes and under different conditions, knowledge of the solid electrolyte interphase (SEI) chemistry can be obtained. In this article, conclusive results concerning the chemical composition of the inorganic part of the SEI is described. The results show that Li2O often reported to be present in the SEI could be an artifact from abusive Ar+ sputtering. The presence of Li2CO3 is a matter of debate; the compound is not observed in anodes extracted from hermetically sealed cells that are never exposed to air. The results show that cell-design and sample handling are crucial to the observed chemical composition of the SEI.

Details

ISSN :
03787753
Volume :
153
Database :
OpenAIRE
Journal :
Journal of Power Sources
Accession number :
edsair.doi...........d99c73bda42eb57887dcdea0f06c0bbf
Full Text :
https://doi.org/10.1016/j.jpowsour.2005.05.062