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@ARTICLE{Meister:828977,
author = {Meister, Paul and Qi, Xin and Kloepsch, Richard and
Krämer, Elisabeth and Streipert, Benjamin and Winter,
Martin and Placke, Tobias},
title = {{A}nodic {B}ehavior of the {A}luminum {C}urrent {C}ollector
in {I}mide-{B}ased {E}lectrolytes: {I}nfluence of {S}olvent,
{O}perating {T}emperature, and {N}ative {O}xide-{L}ayer
{T}hickness},
journal = {ChemSusChem},
volume = {10},
number = {4},
issn = {1864-5631},
address = {Weinheim},
publisher = {Wiley-VCH},
reportid = {FZJ-2017-02794},
pages = {804 - 814},
year = {2017},
abstract = {The inability of imide salts to form a sufficiently
effective passivation layer on aluminum current collectors
is one of the main obstacles that limit their broad
application in electrochemical energy-storage systems.
However, under certain circumstances, the use of
electrolytes with imide electrolyte salts in combination
with the aluminum current collector is possible. In this
contribution, the stability of the aluminum current
collector in electrolytes containing either lithium
bis(trifluoromethanesulfonyl) imide (LiTFSI) or lithium
fluorosulfonyl-(trifluoromethanesulfonyl) imide (LiFTFSI) as
conductive salt was investigated by electrochemical
techniques, that is, cyclic voltammetry (CV) and
chronocoulometry (CC) in either room-temperature ionic
liquids or in ethyl methyl sulfone. In particular, the
influence of the solvent, operating temperature, and
thickness of the native oxide layer of aluminum on the pit
formation at the aluminum current collector surface was
studied by means of scanning electron microscopy. In
general, a more pronounced aluminum dissolution and pit
formation was found at elevated temperatures as well as in
solvents with a high dielectric constant. An enhanced
thickness of the native aluminum oxide layer increases the
oxidative stability versus dissolution. Furthermore, we
found a different reaction rate depending on dwell time at
the upper cut-off potential for aluminum dissolution in
TFSI- and FTFSI-based electrolytes during the CC
measurements; the use of LiFTFSI facilitated the dissolution
of aluminum compared to LiTFSI. Overall, the mechanism of
anodic aluminum dissolution is based on: i) the attack of
the Al2O3 surface by acidic species and ii) the
dissolution of bare aluminum into the electrolyte, which, in
turn, is influenced by the electrolyte's dielectric
constant.},
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:000397006500020},
pubmed = {pmid:28127874},
doi = {10.1002/cssc.201601636},
url = {https://juser.fz-juelich.de/record/828977},
}