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@ARTICLE{Wu:1037569,
author = {Wu and Chang and Chen, Zhiqiang and Windmüller, Anna and
Tsai, Chih-Long and Qin, Zhizhen and Danilov, Dmitri and
Zhou, Lei and Daniel, Davis Thomas and Schaps, Kristian and
Ahmed, Jehad and Raijmakers, Luc and Yu and Tempel, Hermann
and Granwehr, Josef and Chen, Chunguang and Wei and Eichel,
Rüdiger-A. and Notten, Peter H. L.},
title = {{U}nderstanding {D}egradation and {E}nhancing {C}ycling
{S}tabilityfor {H}igh-{V}oltage {L}i{C}o{O}2-{B}ased
{L}i-{M}etal {B}atteries},
journal = {Advanced energy materials},
volume = {15},
number = {7},
issn = {1614-6832},
address = {Weinheim},
publisher = {Wiley-VCH},
reportid = {FZJ-2025-00754},
pages = {2404028},
year = {2025},
abstract = {Improving the energy density of Lithium (Li)-ion batteries
(LIBs) is vital inmeeting the growing demand for
high-performance energy storage andconversion systems.
Developing high-voltage LIBs using high-capacity
andhigh-voltage cathode materials is promising for enhancing
energy density.However, conventional cathode and electrolyte
materials face seriousdecomposition and structural
degradation at high operating voltages. Herein,a dual-salts
electrolyte of lithium bis(fluorosulfonyl)imide and
lithiumbis(trifluoromethanesulfonyl)imide(LiFSI-LiTFSI) is
developed to improve thecycling stability of high-voltage
lithium cobalt oxide (LiCoO2, LCO)||Libatteries. Operando
X-ray diffraction analysis experiments are carried out
tocharacterize the structural stability of cathode
materials, suggesting a severeirreversible phase
transformation at high voltage levels. Aging
simulations,combined with experimental studies, suggest that
a fast loss of activematerials is mainly responsible for the
capacity loss at high voltages.Carbon-coated LCO cathodes
are synthesized to mitigate cycling degradation.The designed
LCO||Li cells exhibit a high-capacity retention of over
$85\%$ after400 cycles at 4 .7V. The present work provides a
novel insight intounderstanding the degradation and
enhancing the stability of high-voltageLCO-based Li-metal
batteries, thus facilitating their practical applications.},
cin = {IET-1},
ddc = {050},
cid = {I:(DE-Juel1)IET-1-20110218},
pnm = {1223 - Batteries in Application (POF4-122) / HITEC -
Helmholtz Interdisciplinary Doctoral Training in Energy and
Climate Research (HITEC) (HITEC-20170406)},
pid = {G:(DE-HGF)POF4-1223 / G:(DE-Juel1)HITEC-20170406},
typ = {PUB:(DE-HGF)16},
UT = {WOS:001380216200001},
doi = {10.1002/aenm.202404028},
url = {https://juser.fz-juelich.de/record/1037569},
}