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@ARTICLE{Hildebrand:851171,
author = {Hildebrand, S and Rheinfeld, A. and Friesen, A and Haetge,
J and Schappacher, F. M and Jossen, A and Winter, Martin},
title = {{T}hermal analysis of
{L}i{N}i0.4{C}o0.2{M}n0.4{O}2/mesocarbon microbeads cells
and electrodes: {S}tate-of-charge and state-of-health
influences on reaction kinetics},
journal = {Journal of the Electrochemical Society},
volume = {165},
issn = {0013-4651},
address = {Pennington, NJ},
publisher = {Electrochemical Soc.},
reportid = {FZJ-2018-04871},
pages = {A104-A117},
year = {2018},
abstract = {The thermal stability of lithium ion batteries was studied
by means of Accelerating Rate Calorimetry in
Heat-Wait-Search operation on both electrode and cell level.
Fresh and aged samples were investigated depending on the
state-of-charge (SoC) of a 5 Ah pouch cell comprising
mesocarbon microbeads and LiNi0.4Co0.2Mn0.4O2 as the anode
and cathode materials. 1 M LiPF6 in EC:DEC 3:7 (by weight)
containing 2 $wt\%$ VC and 0.5 $wt\%$ LiBOB was chosen as
the electrolyte. Measurements on the electrode level
revealed a higher self-heating rate (SHR) of the cathode
compared to the anode for all SoC and state-of-health (SoH)
combinations in the temperature range where a
self-sustaining decomposition reaction could be detected. A
lower SoC showed a lower SHR of the electrode/electrolyte
mixture with no reaction detected on the anode side ≤
$50\%$ cell SoC. Cyclic aging led to a decrease in thermal
stability of the cathode at lower SoC values with no
significant influence on the anode implying a larger safety
threat on the cell level. Avrami-Erofeev and autocatalytic
reaction models were used to quantify the influences of SoC
and SoH on reaction kinetics. Full cell measurements
confirmed the observations at a higher SHR.},
cin = {IEK-12},
ddc = {540},
cid = {I:(DE-Juel1)IEK-12-20141217},
pnm = {131 - Electrochemical Storage (POF3-131)},
pid = {G:(DE-HGF)POF3-131},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000431786800014},
doi = {10.1149/2.0361802jes},
url = {https://juser.fz-juelich.de/record/851171},
}