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Direct determination of solid-electrolyte interphase thickness and composition as a function of state of charge on a silicon anode

Journal Article · · Journal of Physical Chemistry. C
 [1];  [1];  [2];  [1];  [1];  [2];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
+ Show Author Affiliations
Using 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 ) as the electrode becomes less lithiated and thins to 180 with increasing Li content (Li3.7Si). We attribute this breathing to the continual consumption of electrolyte with cycling.
Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Fluid Interface Reactions, Structures and Transport Center (FIRST); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1222554
Journal Information:
Journal of Physical Chemistry. C, Journal Name: Journal of Physical Chemistry. C Journal Issue: 35 Vol. 119; ISSN 1932-7447
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (16)

Determination of the Solid Electrolyte Interphase Structure Grown on a Silicon Electrode Using a Fluoroethylene Carbonate Additive journal July 2017
The Atomic Scale Electrochemical Lithiation and Delithiation Process of Silicon journal September 2017
Mass‐Production of Electrospun Carbon Nanofiber Containing SiO x for Lithium‐Ion Batteries with Enhanced Capacity journal December 2018
Insights into solid electrolyte interphase formation on alternative anode materials in lithium-ion batteries journal December 2016
Evaluating the solid electrolyte interphase formed on silicon electrodes: a comparison of ex situ X-ray photoelectron spectroscopy and in situ neutron reflectometry journal January 2016
Dynamics and morphology of solid electrolyte interphase (SEI) journal January 2016
Electrolyte additives for lithium ion battery electrodes: progress and perspectives journal January 2016
In situ analytical techniques for battery interface analysis journal January 2018
Lithium insertion into silicon electrodes studied by cyclic voltammetry and operando neutron reflectometry journal January 2018
Role of conductive binder to direct solid–electrolyte interphase formation over silicon anodes journal January 2019
Roll-to-roll prelithiation of Sn foil anode suppresses gassing and enables stable full-cell cycling of lithium ion batteries journal January 2019
Designing superior solid electrolyte interfaces on silicon anodes for high-performance lithium-ion batteries journal January 2019
Silicon clathrates for lithium ion batteries: A perspective journal December 2016
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Ion Diffusivity through the Solid Electrolyte Interphase in Lithium-Ion Batteries journal January 2017
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