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Title: Composition and Impedance Heterogeneity in Oxide Electrode Cross-Sections Detected by Raman Spectroscopy

Lithium-bearing layered transition metal oxides are the materials of choice for positive electrodes in high energy lithium-ion cells being developed for electric vehicle applications. During electrochemical cycling, the loss of mobile lithium-ions due to undesirable side reactions and an increase in cell resistance leads to a decline in the energy and power performance of the cells. This performance loss is often non-uniform across multiple cells, especially for those cycled at high voltages and at high C-rates. This non-uniformity results from inhomogeneous behavior in the battery electrodes, which can lead to localized areas that deteriorate faster than the neighboring regions. Raman spectroscopy is among the many advanced techniques that have been used to probe inhomogeneity in electrode behavior. Typically, Raman spectroscopy of lithium-ion cell electrodes are conducted in the top-down mode, and at-best provide an incomplete, surface biased account of electrode behavior. In contrast, micro-Raman measurements conducted on ion-milled electrode cross-sections provide information from regions that span the full thickness of the electrode. Here, spectroscopy data from pristine, aged, and relithiated/aged positive electrodes are reported. In conclusion, the spectral differences between oxide particles near the top-surface and particles deeper into the aged electrodes highlight a clearly defined non-uniform behavior during cellmore » aging.« less
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [1] ; ORCiD logo [1]
  1. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Advanced Materials Interfaces
Additional Journal Information:
Journal Volume: 5; Journal Issue: 9; Journal ID: ISSN 2196-7350
Publisher:
Wiley-VCH
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; NCM523; aging; inhomogeneity; ion milling; lithium battery
OSTI Identifier:
1461430
Alternate Identifier(s):
OSTI ID: 1419894

Gilbert, James A., Maroni, Victor A., Cui, Yanjie, Gosztola, David J., Miller, Dean J., and Abraham, Daniel P.. Composition and Impedance Heterogeneity in Oxide Electrode Cross-Sections Detected by Raman Spectroscopy. United States: N. p., Web. doi:10.1002/admi.201701447.
Gilbert, James A., Maroni, Victor A., Cui, Yanjie, Gosztola, David J., Miller, Dean J., & Abraham, Daniel P.. Composition and Impedance Heterogeneity in Oxide Electrode Cross-Sections Detected by Raman Spectroscopy. United States. doi:10.1002/admi.201701447.
Gilbert, James A., Maroni, Victor A., Cui, Yanjie, Gosztola, David J., Miller, Dean J., and Abraham, Daniel P.. 2018. "Composition and Impedance Heterogeneity in Oxide Electrode Cross-Sections Detected by Raman Spectroscopy". United States. doi:10.1002/admi.201701447.
@article{osti_1461430,
title = {Composition and Impedance Heterogeneity in Oxide Electrode Cross-Sections Detected by Raman Spectroscopy},
author = {Gilbert, James A. and Maroni, Victor A. and Cui, Yanjie and Gosztola, David J. and Miller, Dean J. and Abraham, Daniel P.},
abstractNote = {Lithium-bearing layered transition metal oxides are the materials of choice for positive electrodes in high energy lithium-ion cells being developed for electric vehicle applications. During electrochemical cycling, the loss of mobile lithium-ions due to undesirable side reactions and an increase in cell resistance leads to a decline in the energy and power performance of the cells. This performance loss is often non-uniform across multiple cells, especially for those cycled at high voltages and at high C-rates. This non-uniformity results from inhomogeneous behavior in the battery electrodes, which can lead to localized areas that deteriorate faster than the neighboring regions. Raman spectroscopy is among the many advanced techniques that have been used to probe inhomogeneity in electrode behavior. Typically, Raman spectroscopy of lithium-ion cell electrodes are conducted in the top-down mode, and at-best provide an incomplete, surface biased account of electrode behavior. In contrast, micro-Raman measurements conducted on ion-milled electrode cross-sections provide information from regions that span the full thickness of the electrode. Here, spectroscopy data from pristine, aged, and relithiated/aged positive electrodes are reported. In conclusion, the spectral differences between oxide particles near the top-surface and particles deeper into the aged electrodes highlight a clearly defined non-uniform behavior during cell aging.},
doi = {10.1002/admi.201701447},
journal = {Advanced Materials Interfaces},
number = 9,
volume = 5,
place = {United States},
year = {2018},
month = {2}
}