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@ARTICLE{Ju:1024913,
author = {Ju, Xiaokang and Hou, Xu and Liu, Zhongqing and Du, Leilei
and Zhang, Li and Xie, Tangtang and Paillard, Elie and Wang,
Taihong and Winter, Martin and Li, Jie},
title = {{R}evealing the {E}ffect of {H}igh {N}i {C}ontent in
{L}i‐{R}ich {C}athode {M}aterials: {M}itigating {V}oltage
{D}ecay or {I}ncreasing {I}ntrinsic {R}eactivity},
journal = {Small},
volume = {19},
number = {20},
issn = {1613-6810},
address = {Weinheim},
publisher = {Wiley-VCH},
reportid = {FZJ-2024-02563},
pages = {2207328},
year = {2023},
note = {Unterstützt durch DFG, Projekt Li 2916/2-1},
abstract = {Li-rich layered oxides are considered as one of the most
promising cathode materials for secondary lithium batteries
due to their high specific capacities, but the issue of
continuous voltage decay during cycling hinders their market
entry. Increasing the Ni content in Li-rich materials is
assumed to be an effective way to address this issue and
attracts recent research interests. However, a high Ni
content may induce increased intrinsic reactivity of
materials, resulting in severe side reactions with the
electrolyte. Thus, a comprehensive study to differentiate
the two effects of the Ni content on the cell performance
with Li-rich cathode is carried out in this work. Herein, it
is demonstrated that a properly dosed amount of Ni can
effectively suppress the voltage decay in Li-rich cathodes,
while over-loading of Ni, on the contrary, can cause
structural instability, Ni dissolution, and nonuniform Li
deposition during cycling as well as severe oxygen loss.
This work offers a deep understanding on the impacts of Ni
content in Li-rich materials, which can be a good guidance
for the future design of such cathodes for high energy
density lithium batteries.},
cin = {IEK-12},
ddc = {620},
cid = {I:(DE-Juel1)IEK-12-20141217},
pnm = {1221 - Fundamentals and Materials (POF4-122)},
pid = {G:(DE-HGF)POF4-1221},
typ = {PUB:(DE-HGF)16},
pubmed = {36799132},
UT = {WOS:000939488800001},
doi = {10.1002/smll.202207328},
url = {https://juser.fz-juelich.de/record/1024913},
}