Misuse of XPS in Analyzing Solid Polymer Electrolytes for Lithium Batteries

Ortal Breuer; Yosef Gofer; Yuval Elias; Miryam Fayena-Greenstein; Doron Aurbach

doi:10.1149/1945-7111/ad2ef3

Misuse of XPS in Analyzing Solid Polymer Electrolytes for Lithium Batteries

Ortal Breuer, Yosef Gofer, Yuval Elias, Miryam Fayena-Greenstein, Doron Aurbach

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

One of the most powerful spectroscopic tools for battery analysis is X-ray photoelectron spectroscopy (XPS); however, its great power, must be accompanied by great responsibility for authenticity. Fluorine is documented to be unstable under XPS conditions, and fluorinated salts used in Li batteries show photodecomposition. As all-solid-state batteries advance, demand for surface characterization is increasing. Here, a popular solid polymer electrolyte comprising a fluorinated salt in a PEO matrix was measured by XPS. Rapid photodecomposition after few minutes produced mainly LiF, initially not found on the surface. Not being aware of such artifacts may lead to an erroneous analysis of the characterized electrochemical system.

Original language	English
Article number	030510
Journal	Journal of the Electrochemical Society
Volume	171
Issue number	3
DOIs	https://doi.org/10.1149/1945-7111/ad2ef3
State	Published - 31 Mar 2024

Bibliographical note

Publisher Copyright:
© 2024 The Author(s). Published on behalf of The Electrochemical Society by IOP Publishing Limited.

Keywords

LiF
LiTFSI
PEO
XPS
lithium all-solid-state batteries
solid electrolyte interface
solid polymer electrolyte (SPE)

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10.1149/1945-7111/ad2ef3

Cite this

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abstract = "One of the most powerful spectroscopic tools for battery analysis is X-ray photoelectron spectroscopy (XPS); however, its great power, must be accompanied by great responsibility for authenticity. Fluorine is documented to be unstable under XPS conditions, and fluorinated salts used in Li batteries show photodecomposition. As all-solid-state batteries advance, demand for surface characterization is increasing. Here, a popular solid polymer electrolyte comprising a fluorinated salt in a PEO matrix was measured by XPS. Rapid photodecomposition after few minutes produced mainly LiF, initially not found on the surface. Not being aware of such artifacts may lead to an erroneous analysis of the characterized electrochemical system.",

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AU - Aurbach, Doron

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AB - One of the most powerful spectroscopic tools for battery analysis is X-ray photoelectron spectroscopy (XPS); however, its great power, must be accompanied by great responsibility for authenticity. Fluorine is documented to be unstable under XPS conditions, and fluorinated salts used in Li batteries show photodecomposition. As all-solid-state batteries advance, demand for surface characterization is increasing. Here, a popular solid polymer electrolyte comprising a fluorinated salt in a PEO matrix was measured by XPS. Rapid photodecomposition after few minutes produced mainly LiF, initially not found on the surface. Not being aware of such artifacts may lead to an erroneous analysis of the characterized electrochemical system.

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KW - PEO

KW - XPS

KW - lithium all-solid-state batteries

KW - solid electrolyte interface

KW - solid polymer electrolyte (SPE)

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Misuse of XPS in Analyzing Solid Polymer Electrolytes for Lithium Batteries

Abstract

Bibliographical note

Keywords

UN SDGs

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