Power and capacity fade mechanism of LiNi0.8Co0.15Al0.0502composite cathodes in high-power lithium-ion batteries
Abstract
High-power Li-ion cells that were tested at elevatedtemperatures showed a significant impedance rise, which was associatedprimarily with the LiNi0.8Co0.15Al0.05O2 cathode. By systematicallycollecting thousands of Raman spectra from 50 x 80 mm areas at 0.9 mmspatial resolution, and integrating the respective bands of the cathodecomponents for each spectrum, we were able to produce color-coded,semi-quantitative composition maps of cathode surfaces. Raman microscopyimages of cathodes from tested cells revealed that cell cycling orstorage at elevated temperatures led to significant changes in theLiNi0.8Co0.15Al0.05O2/elemental-carbon surface concentration ratio. Theloss of conductive carbon correlated with the power and capacity fade ofthe tested cathodes. The cathode surface state of charge (SOC) variedbetween individual grains of active material, and at some locations thespectra indicated the presence of fully charged material, despite thedeep cell discharge at the end of testing.
- Authors:
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE. Assistant Secretary for Energy Efficiency andRenewable Energy. Office of the FreedomCAR and Vehicle TechnologiesProgram
- OSTI Identifier:
- 894557
- Report Number(s):
- LBNL-54273
R&D Project: 477603; BnR: VT0301030
- DOE Contract Number:
- DE-AC02-05CH11231
- Resource Type:
- Conference
- Resource Relation:
- Conference: 204th Meeting of Electrochemical Society,Orlando, FL, October 12-16, 2003
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 25; : Li-ion battery cathode carbon retreat conductivitymicro-Raman AFM
Citation Formats
Kostecki, Robert, and McLarnon, Frank. Power and capacity fade mechanism of LiNi0.8Co0.15Al0.0502composite cathodes in high-power lithium-ion batteries. United States: N. p., 2003.
Web.
Kostecki, Robert, & McLarnon, Frank. Power and capacity fade mechanism of LiNi0.8Co0.15Al0.0502composite cathodes in high-power lithium-ion batteries. United States.
Kostecki, Robert, and McLarnon, Frank. 2003.
"Power and capacity fade mechanism of LiNi0.8Co0.15Al0.0502composite cathodes in high-power lithium-ion batteries". United States. https://www.osti.gov/servlets/purl/894557.
@article{osti_894557,
title = {Power and capacity fade mechanism of LiNi0.8Co0.15Al0.0502composite cathodes in high-power lithium-ion batteries},
author = {Kostecki, Robert and McLarnon, Frank},
abstractNote = {High-power Li-ion cells that were tested at elevatedtemperatures showed a significant impedance rise, which was associatedprimarily with the LiNi0.8Co0.15Al0.05O2 cathode. By systematicallycollecting thousands of Raman spectra from 50 x 80 mm areas at 0.9 mmspatial resolution, and integrating the respective bands of the cathodecomponents for each spectrum, we were able to produce color-coded,semi-quantitative composition maps of cathode surfaces. Raman microscopyimages of cathodes from tested cells revealed that cell cycling orstorage at elevated temperatures led to significant changes in theLiNi0.8Co0.15Al0.05O2/elemental-carbon surface concentration ratio. Theloss of conductive carbon correlated with the power and capacity fade ofthe tested cathodes. The cathode surface state of charge (SOC) variedbetween individual grains of active material, and at some locations thespectra indicated the presence of fully charged material, despite thedeep cell discharge at the end of testing.},
doi = {},
url = {https://www.osti.gov/biblio/894557},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Sep 01 00:00:00 EDT 2003},
month = {Mon Sep 01 00:00:00 EDT 2003}
}