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Title: Measuring Li+ inventory losses in LiCoO2/graphite cells using Raman microscopy

Abstract

Here, the contribution from loss of Li+ inventory to capacity fade is described for slow rates (C/10) and long-term cycling (up to 80 cycles). It was found through electrochemical testing and ex-situ Raman analysis that at these slow rates, the entirety of capacity loss up to 80 cycles can be explained by loss of Li+ inventory in the cell. The Raman spectrum of LiCoO2 is sensitive to the state of lithiation and can therefore be leveraged to quantify the state of lithiation for individual particles. With these Raman derived estimates, the lithiation state of the cathode in the discharged state is compared to electrochemical data as a function of cycle number. High correlation is found between Raman quantifications of cycleable lithium and the capacity fade. Additionally, the linear relationship between discharge capacity and cell overpotential suggests that the loss of capacity stems from an impedance rise of the electrodes, which based on Li inventory losses, is caused by SEI formation and repair.

Authors:
 [1];  [2];  [2]; ;  [3]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Rensselaer Polytechnic Institute, Troy, NY (United States)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  3. Rensselaer Polytechnic Institute, Troy, NY (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1247658
Report Number(s):
SAND-2016-0211J
Journal ID: ISSN 0013-4651; 618347
Grant/Contract Number:  
AC04-94AL85000
Resource Type:
Accepted Manuscript
Journal Name:
Journal of the Electrochemical Society
Additional Journal Information:
Journal Volume: 163; Journal Issue: 6; Journal ID: ISSN 0013-4651
Publisher:
The Electrochemical Society
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; 36 MATERIALS SCIENCE; capacity loss; LiCoO2; lithium ion batteries; Raman

Citation Formats

Snyder, Chelsea Marie, Apblett, Christopher A., Grillet, Anne, Thomas Edwin Beechem, and Duquette, David. Measuring Li+ inventory losses in LiCoO2/graphite cells using Raman microscopy. United States: N. p., 2016. Web. doi:10.1149/2.1111606jes.
Snyder, Chelsea Marie, Apblett, Christopher A., Grillet, Anne, Thomas Edwin Beechem, & Duquette, David. Measuring Li+ inventory losses in LiCoO2/graphite cells using Raman microscopy. United States. https://doi.org/10.1149/2.1111606jes
Snyder, Chelsea Marie, Apblett, Christopher A., Grillet, Anne, Thomas Edwin Beechem, and Duquette, David. Fri . "Measuring Li+ inventory losses in LiCoO2/graphite cells using Raman microscopy". United States. https://doi.org/10.1149/2.1111606jes. https://www.osti.gov/servlets/purl/1247658.
@article{osti_1247658,
title = {Measuring Li+ inventory losses in LiCoO2/graphite cells using Raman microscopy},
author = {Snyder, Chelsea Marie and Apblett, Christopher A. and Grillet, Anne and Thomas Edwin Beechem and Duquette, David},
abstractNote = {Here, the contribution from loss of Li+ inventory to capacity fade is described for slow rates (C/10) and long-term cycling (up to 80 cycles). It was found through electrochemical testing and ex-situ Raman analysis that at these slow rates, the entirety of capacity loss up to 80 cycles can be explained by loss of Li+ inventory in the cell. The Raman spectrum of LiCoO2 is sensitive to the state of lithiation and can therefore be leveraged to quantify the state of lithiation for individual particles. With these Raman derived estimates, the lithiation state of the cathode in the discharged state is compared to electrochemical data as a function of cycle number. High correlation is found between Raman quantifications of cycleable lithium and the capacity fade. Additionally, the linear relationship between discharge capacity and cell overpotential suggests that the loss of capacity stems from an impedance rise of the electrodes, which based on Li inventory losses, is caused by SEI formation and repair.},
doi = {10.1149/2.1111606jes},
journal = {Journal of the Electrochemical Society},
number = 6,
volume = 163,
place = {United States},
year = {Fri Mar 25 00:00:00 EDT 2016},
month = {Fri Mar 25 00:00:00 EDT 2016}
}

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Cited by: 16 works
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Works referencing / citing this record:

Ex situ and operando study of LiCoO 2 thin films by Raman spectroscopy: Thermal and electrochemical properties
journal, July 2019

  • Le Van‐Jodin, Lucie; Rouchon, Denis; Le, Van‐Hoan
  • Journal of Raman Spectroscopy, Vol. 50, Issue 10
  • DOI: 10.1002/jrs.5669

Electrochemical Cycle-Life Characterization of High Energy Lithium-Ion Cells with Thick Li(Ni 0.6 Mn 0.2 Co 0.2 )O 2 and Graphite Electrodes
journal, January 2017

  • Leng, Yongjun; Ge, Shanhai; Marple, Dan
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