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@ARTICLE{Zoller:877276,
author = {Zoller, Florian and Böhm, Daniel and Luxa, Jan and
Döblinger, Markus and Sofer, Zdenek and Semenenko, Dmitri
A. and Bein, Thomas and Fattakhova, Dina},
title = {{F}reestanding {L}i{F}e0. 2{M}n0. 8{PO}4/r{GO}
nanocomposites as high energy density fast charging cathodes
for lithium-ion batteries},
journal = {Materials today},
volume = {16},
issn = {2468-6069},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Ltd.},
reportid = {FZJ-2020-02099},
pages = {100416},
year = {2020},
abstract = {Freestanding electrodes for lithium ion batteries are
considered as a promising option to increase the total
gravimetric energy density of the cells due to a decreased
weight of electrochemically inactive materials. We report a
simple procedure for the fabrication of freestanding
LiFe0.2Mn0.8PO4 (LFMP)/rGO electrodes with a very high
loading of active material of 83 $wt\%,$ high total loading
of up to 8 mg cm−2, high energy density, excellent cycling
stability and at the same time very fast charging rate, with
a total performance significantly exceeding the values
reported in the literature. The keys to the improved
electrode performance are optimization of LFMP nanoparticles
via nanoscaling and doping; the use of graphene oxide (GO)
with its high concentration of surface functional groups
favoring the adhesion of high amounts of LFMP nanoparticles,
and freeze-casting of the GO-based nanocomposites to prevent
the morphology collapse and provide a unique fluffy open
microstructure of the freestanding electrodes. The rate and
the cycling performance of the obtained freestanding
electrodes are superior compared to their Al-foil coated
equivalents, especially when calculated for the entire
weight of the electrode, due to the extremely reduced
content of electrochemically inactive material (17 $wt\%$ of
electrochemically inactive material in case of the
freestanding compared to 90 $wt\%$ for the Al-foil based
electrode), resulting in 120 mAh g−1electrode in contrast
to 10 mAh g−1electrode at 0.2 C. The electrochemical
performance of the freestanding LFMP/rGO electrodes is also
considerably better than the values reported in literature
for freestanding LFMP and LMP composites, and can even keep
up with those of LFP-based analogues. The freestanding
LFMP/rGO reported in this work is additionally attractive
due to its high gravimetric energy density (604 Wh
kg−1LFMP at 0.2C). The obtained results demonstrate the
advantage of freestanding LiFe0.2Mn0.8PO4/rGO electrodes and
their great potential for applications in lithium ion
batteries.},
cin = {IEK-1},
ddc = {600},
cid = {I:(DE-Juel1)IEK-1-20101013},
pnm = {131 - Electrochemical Storage (POF3-131)},
pid = {G:(DE-HGF)POF3-131},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000539083500022},
doi = {10.1016/j.mtener.2020.100416},
url = {https://juser.fz-juelich.de/record/877276},
}