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@ARTICLE{Streipert:878505,
author = {Streipert, Benjamin and Stolz, Lukas and Homann, Gerrit and
Janßen, Pia and Cekic-Laskovic, Isidora and Winter, Martin
and Kasnatscheew, Johannes},
title = {{C}onventional {E}lectrolyte and {I}nactive {E}lectrode
{M}aterials in {L}ithium {I}on {B}atteries: {D}etermining
{C}umulative {I}mpact of {O}xidative {D}ecomposition at high
voltage},
journal = {ChemSusChem},
volume = {13},
number = {19},
issn = {1864-564X},
address = {Weinheim},
publisher = {Wiley-VCH},
reportid = {FZJ-2020-02884},
pages = {5301-5307},
year = {2020},
abstract = {High‐voltage electrodes based on, for example,
LiNi0.5Mn1.504 (LNMO) active material require oxidative
stability of inactive materials up to 4.95 V vs. Li|Li+.
Referring to literature, they are frequently supposed to be
unstable, though conclusions are still controversial and
clearly depend on the used investigation method. For
example, the galvanostatic method, as a common method in
battery research, points to the opposite, thus to a
stability of the inactive materials, which can be derived
from, for example, the high decomposition plateau at
5.56 V vs. Li|Li+ and stable performance of the LNMO
charge/discharge cycling. This work aims to unravel this
apparent contradiction of the galvanostatic method with the
literature by a thorough investigation of possible trace
oxidation reactions in cumulative manner, that is, over many
charge/discharge cycles. Indeed, the cumulated irreversible
specific capacity amounts to ≈10 mAh g−1 during the
initial 50 charge/discharge cycles, which is determined by
imitating extreme LNMO high‐voltage conditions using
electrodes solely consisting of inactive materials. This can
explain the ambiguities in stability interpretations of the
galvanostatic method and the literature, as the respective
irreversible specific capacity is obviously too low for
distinct detection in conventional galvanostatic approaches
and can be only detected at extreme high‐voltage
conditions. In this regard, the technique of
chronoamperometry is shown to be an effective and proper
complementary tool for electrochemical stability research in
a qualitative and quantitative manner.},
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},
pubmed = {pmid:32692891},
UT = {WOS:000563871600001},
doi = {10.1002/cssc.202001530},
url = {https://juser.fz-juelich.de/record/878505},
}