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Title: Diagnostic evaluation of power fade phenomena and calendar lifereduction in high-power lithium-ion batteries

Abstract

High-power Li-ion cells with graphite anodes and LiNi{sub 0.8}Co{sub 0.15}Al{sub 0.05}O{sub 2} cathodes that were cycled and stored at elevated temperatures showed a significant impedance rise and capacity fade, which were associated primarily with the LiNi{sub 0.8}Co{sub 0.15}Al{sub 0.05}O{sub 2} cathode. A combination of electrochemical, physical, and chemical diagnostic techniques, including Raman, SEM, and current-sensing AFM, was used to characterize the cathodes from these cells in order to produce a clear picture of the mechanism for cell degradation. Systematic Raman mapping of 50 x 80 {mu}m areas at 0.9 {mu}m spatial resolution produced semi-quantitative composition maps of cathode surfaces. Raman microscopy surface composition maps and SEM images of cathodes from tested cells revealed that cell cycling or storage at elevated temperatures led to significant changes in the LiNi{sub 0.8}Co{sub 0.15}Al{sub 0.05}O{sub 2}/elemental-carbon surface concentration ratio. The loss of conductive carbon correlated with the power and capacity fade of the tested cathodes and the loss of surface electronic conductivity.

Authors:
;
Publication Date:
Research Org.:
Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US)
Sponsoring Org.:
USDOE. Assistant Secretary for Energy Efficiency andRenewable Energy. Office of the FreedomCAR and Vehicle TechnologiesProgram
OSTI Identifier:
886824
Report Number(s):
LBNL-55322
R&D Project: 477603; BnR: VT0301030; TRN: US200616%%1198
DOE Contract Number:  
DE-AC02-05CH11231
Resource Type:
Conference
Resource Relation:
Conference: NATO-CARWC Science for Peace, Argonne NationalLaboratroy, Argonne IL, October 19-24, 2003
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; ANL; ANODES; CALENDARS; CAPACITY; CARBON; CATHODES; CONCENTRATION RATIO; DIAGNOSTIC TECHNIQUES; EVALUATION; GRAPHITE; IMPEDANCE; MICROSCOPY; SPATIAL RESOLUTION; STORAGE

Citation Formats

Kostecki, Robert, and McLarnon, Frank. Diagnostic evaluation of power fade phenomena and calendar lifereduction in high-power lithium-ion batteries. United States: N. p., 2004. Web.
Kostecki, Robert, & McLarnon, Frank. Diagnostic evaluation of power fade phenomena and calendar lifereduction in high-power lithium-ion batteries. United States.
Kostecki, Robert, and McLarnon, Frank. Sat . "Diagnostic evaluation of power fade phenomena and calendar lifereduction in high-power lithium-ion batteries". United States. https://www.osti.gov/servlets/purl/886824.
@article{osti_886824,
title = {Diagnostic evaluation of power fade phenomena and calendar lifereduction in high-power lithium-ion batteries},
author = {Kostecki, Robert and McLarnon, Frank},
abstractNote = {High-power Li-ion cells with graphite anodes and LiNi{sub 0.8}Co{sub 0.15}Al{sub 0.05}O{sub 2} cathodes that were cycled and stored at elevated temperatures showed a significant impedance rise and capacity fade, which were associated primarily with the LiNi{sub 0.8}Co{sub 0.15}Al{sub 0.05}O{sub 2} cathode. A combination of electrochemical, physical, and chemical diagnostic techniques, including Raman, SEM, and current-sensing AFM, was used to characterize the cathodes from these cells in order to produce a clear picture of the mechanism for cell degradation. Systematic Raman mapping of 50 x 80 {mu}m areas at 0.9 {mu}m spatial resolution produced semi-quantitative composition maps of cathode surfaces. Raman microscopy surface composition maps and SEM images of cathodes from tested cells revealed that cell cycling or storage at elevated temperatures led to significant changes in the LiNi{sub 0.8}Co{sub 0.15}Al{sub 0.05}O{sub 2}/elemental-carbon surface concentration ratio. The loss of conductive carbon correlated with the power and capacity fade of the tested cathodes and the loss of surface electronic conductivity.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2004},
month = {5}
}

Conference:
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