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@ARTICLE{EilersRethwisch:865963,
author = {Eilers-Rethwisch, Matthias and Winter, Martin and
Schappacher, Falko Mark},
title = {{S}ynthesis, electrochemical investigation and structural
analysis of doped {L}i[{N}i0.6{M}n0.2{C}o0.2-{M}]{O}2 (x =
0, 0.05; {M} = {A}l, {F}e, {S}n) cathode materials},
journal = {Journal of power sources},
volume = {387},
issn = {0378-7753},
address = {New York, NY [u.a.]},
publisher = {Elsevier},
reportid = {FZJ-2019-05229},
pages = {101 - 107},
year = {2018},
abstract = {Layered Ni-rich Li[Ni0.6Mn0.2Co0.2-xMx]O2 cathode materials
(x = 0, 0.05; M = Al, Fe, Sn) are synthesized via a
co-precipitation synthesis route and the effect of dopants
on the structure and electrochemical performance is
investigated. All synthesized materials show a well-defined
layered structure of the hexagonal α-NaFeO2 phase
investigated by X-ray diffraction (XRD). Undoped
LiNi0.6Mn0.2Co0.2O2 exhibits a discharge capacity of 170 mAh
g−1 in Li-metal 2032 coin-type cells. Doped materials
reach lower capacities between 145 mAh g−1 for Al and 160
mAh g−1 for Sn. However, all doped materials prolong the
cycle life by up to $20\%.$ Changes of the lattice parameter
before and after delithiation yield information about
structural stability. A smaller repulsion of the transition
metal layer during delithiation in the Sn-doped material
leads to a smaller expansion of the unit cell, which results
in enhanced structural stability of the material. The
improved structural stability of Sn-doped NMC cathode active
material is proven by thermal investigations with the help
of Differential Scanning Calorimetry (DSC) and
Thermogravimetric Analysis (TGA).},
cin = {IEK-12},
ddc = {620},
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:000430899800013},
doi = {10.1016/j.jpowsour.2018.02.080},
url = {https://juser.fz-juelich.de/record/865963},
}