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@ARTICLE{Li:894582,
author = {Li, Jie and Hou, Xu and Wang, Rui and He, Xin and Pollard,
Travis P and Ju, Xiaokang and Du, Leilei and Paillard, Elie
and Frielinghaus, Henrich and Barnsley, Lester C. and
Borodin, Oleg and Xu, Kang and Winter, Martin},
title = {{S}tabilizing the solid‐electrolyte interphase with
polyacrylamide for high‐voltage aqueous lithium‐ion
batteries},
journal = {Angewandte Chemie / International edition},
volume = {60},
number = {42},
issn = {1521-3773},
address = {Weinheim},
publisher = {Wiley-VCH},
reportid = {FZJ-2021-03289},
pages = {22812-22817},
year = {2021},
abstract = {The introduction of “water-in-salt” electrolyte (WiSE)
concept opens a new horizon to aqueous electrochemistry that
is benefited from the formation of a solid-electrolyte
interphase (SEI). However, such SEI still faces multiple
challenges, including dissolution, mechanical damaging, and
incessant reforming, which result in poor cycling stability.
Here, we report a polymeric additive, polyacrylamide (PAM)
that effectively stabilizes the interphase in WiSE. With the
addition of 5 molar $\%$ PAM to 21 mol kg-1 LiTFSI
electrolyte, a LiMn2O4L-TiO2 full cell exhibits
enhanced cycling stability with $86\%$ capacity retention
after 100 cycles at 1 C. The formation mechanism and
evolution of PAM-assisted SEI was investigated using
operando small angle neutron scattering and density
functional theory (DFT) calculations, which reveal that PAM
minimizes the presence of free water molecules at the
anode/electrolyte interface, accelerates the TFSI- anion
decomposition, and densifies the SEI.},
cin = {JCNS-FRM-II / JCNS-4 / MLZ / IEK-12},
ddc = {540},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-4-20201012 / I:(DE-588b)4597118-3 /
I:(DE-Juel1)IEK-12-20141217},
pnm = {6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ)
(POF4-6G4)},
pid = {G:(DE-HGF)POF4-6G4},
experiment = {EXP:(DE-MLZ)KWS1-20140101},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:34379346},
UT = {WOS:000695022900001},
doi = {10.1002/anie.202107252},
url = {https://juser.fz-juelich.de/record/894582},
}