Direct Determination of Solid-Electrolyte Interphase Thickness and Composition as a Function of State of Charge on a Silicon Anode

Gabriel M. Veith; Mathieu Doucet; J. Kevin Baldwin; Robert L. Sacci; Tyler M. Fears; Yongqiang Wang; James F. Browning

doi:10.1021/acs.jpcc.5b06817

Direct Determination of Solid-Electrolyte Interphase Thickness and Composition as a Function of State of Charge on a Silicon Anode

Gabriel M. Veith, Mathieu Doucet, J. Kevin Baldwin, Robert L. Sacci, Tyler M. Fears, Yongqiang Wang, James F. Browning

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

135 Scopus citations

Abstract

With the use of neutron reflectometry, we have determined the thickness and chemistry of the solid-electrolyte interphase (SEI) layer grown on a silicon anode as a function of state of charge and during cycling. We show the chemistry of this SEI layer becomes more LiF like with increasing lithiation and more Li-C-O-F like with delithiation. More importantly, the SEI layer thickness appears to increase (about 250 Å) as the electrode becomes less lithiated and thins to 180 Å with increasing Li content (Li_3.7Si). We attribute this "breathing" to the continual consumption of electrolyte with cycling.

Original language	English
Pages (from-to)	20339-20349
Number of pages	11
Journal	Journal of Physical Chemistry C
Volume	119
Issue number	35
DOIs	https://doi.org/10.1021/acs.jpcc.5b06817
State	Published - Aug 17 2015

Bibliographical note

Publisher Copyright:
© 2015 American Chemical Society.

Funding

Funders	Funder number
Oak Ridge Institute for Science and Education
Office of Science
U.S. Department of Energy	DE-AC05-06OR23100, DEAC05-00OR22725

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1021/acs.jpcc.5b06817

Cite this

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title = "Direct Determination of Solid-Electrolyte Interphase Thickness and Composition as a Function of State of Charge on a Silicon Anode",

abstract = "With the use of neutron reflectometry, we have determined the thickness and chemistry of the solid-electrolyte interphase (SEI) layer grown on a silicon anode as a function of state of charge and during cycling. We show the chemistry of this SEI layer becomes more LiF like with increasing lithiation and more Li-C-O-F like with delithiation. More importantly, the SEI layer thickness appears to increase (about 250 {\AA}) as the electrode becomes less lithiated and thins to 180 {\AA} with increasing Li content (Li3.7Si). We attribute this {"}breathing{"} to the continual consumption of electrolyte with cycling.",

author = "Veith, {Gabriel M.} and Mathieu Doucet and Baldwin, {J. Kevin} and Sacci, {Robert L.} and Fears, {Tyler M.} and Yongqiang Wang and Browning, {James F.}",

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T1 - Direct Determination of Solid-Electrolyte Interphase Thickness and Composition as a Function of State of Charge on a Silicon Anode

AU - Veith, Gabriel M.

AU - Doucet, Mathieu

AU - Baldwin, J. Kevin

AU - Sacci, Robert L.

AU - Fears, Tyler M.

AU - Wang, Yongqiang

AU - Browning, James F.

PY - 2015/8/17

Y1 - 2015/8/17

N2 - With the use of neutron reflectometry, we have determined the thickness and chemistry of the solid-electrolyte interphase (SEI) layer grown on a silicon anode as a function of state of charge and during cycling. We show the chemistry of this SEI layer becomes more LiF like with increasing lithiation and more Li-C-O-F like with delithiation. More importantly, the SEI layer thickness appears to increase (about 250 Å) as the electrode becomes less lithiated and thins to 180 Å with increasing Li content (Li3.7Si). We attribute this "breathing" to the continual consumption of electrolyte with cycling.

AB - With the use of neutron reflectometry, we have determined the thickness and chemistry of the solid-electrolyte interphase (SEI) layer grown on a silicon anode as a function of state of charge and during cycling. We show the chemistry of this SEI layer becomes more LiF like with increasing lithiation and more Li-C-O-F like with delithiation. More importantly, the SEI layer thickness appears to increase (about 250 Å) as the electrode becomes less lithiated and thins to 180 Å with increasing Li content (Li3.7Si). We attribute this "breathing" to the continual consumption of electrolyte with cycling.

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VL - 119

SP - 20339

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JO - Journal of Physical Chemistry C

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ER -

Direct Determination of Solid-Electrolyte Interphase Thickness and Composition as a Function of State of Charge on a Silicon Anode

Abstract

Bibliographical note

Funding

UN SDGs

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