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@ARTICLE{Oldiges:858317,
author = {Oldiges, Kristina and von Aspern, Natascha and
Cekic-Laskovic, Isidora and Winter, Martin and Brunklaus,
Gunther},
title = {{I}mpact of {T}rifluoromethylation of {A}diponitrile on
{A}luminum {D}issolution {B}ehavior in {D}initrile-{B}ased
{E}lectrolytes},
journal = {Journal of the Electrochemical Society},
volume = {165},
number = {16},
issn = {0013-4651},
address = {Pennington, NJ},
publisher = {Electrochemical Soc.},
reportid = {FZJ-2018-07205},
pages = {A3773 - A3781},
year = {2018},
abstract = {Aluminum dissolution behavior of adiponitrile (ADN) and its
trifluoromethylated derivative
3-(trifluoromethyl)adiponitrile (ADN-CF3) as single or
co-solvent with propylene carbonate (PC) was determined in
electrolytes with lithium bis(trifluoromethylsulfonyl) imide
(LiTFSI) as conducting salt via selected electrochemical,
spectroscopic and physicochemical methods. ADN-CF3 is
introduced as a promising electrolyte solvent affording
reduced aluminum dissolution in the presence of imide salts.
In cases where neither electrolyte components nor
decomposition products thereof enable the formation of
protective surface layers on aluminum current collectors,
both the viscosity and relative permittivity of the solvents
could be identified as key parameters for reducing aluminum
dissolution. High viscosities reduce the mobility of
involved species yielding increased complex formation of Li+
and TFSI− ions or solvent molecules, hindering a reaction
of TFSI− anions with the passivating aluminum oxide
surface to Al(TFSI)x. Low relative permittivity yields
lesser ionic dissociation of the lithium salt and lower
solubility of Al(TFSI)x species in viscous electrolytes.
Hence, reduced aluminum dissolution was observed by
substituting electrolyte solvents from PC to ADN to ADN-CF3.
The obtained results significantly contribute to better
understanding of anodic aluminum dissolution behavior, while
encouraging future design of advanced electrolytes with high
viscosities and low-permittivity solvents that possess high
oxidative stabilities.},
cin = {IEK-12},
ddc = {660},
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:000452659900002},
doi = {10.1149/2.0461816jes},
url = {https://juser.fz-juelich.de/record/858317},
}