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@ARTICLE{Kasnatscheew:828980,
author = {Kasnatscheew, Johannes and Rodehorst, Uta and Streipert,
Benjamin and Wiemers-Meyer, Simon and Jakelski, Rene and
Wagner, Ralf and Cekic-Laskovic, Isidora and Winter, Martin},
title = {{L}earning from {O}verpotentials in {L}ithium {I}on
{B}atteries: {A} {C}ase {S}tudy on the {L}i{N}i $_{1/3}$
{C}o $_{1/3}$ {M}n $_{1/3}$ {O} $_{2}$ ({NCM}) {C}athode},
journal = {Journal of the Electrochemical Society},
volume = {163},
number = {14},
issn = {1945-7111},
address = {Pennington, NJ},
publisher = {Electrochemical Soc.},
reportid = {FZJ-2017-02797},
pages = {A2943 - A2950},
year = {2016},
abstract = {The practically available specific energy of Li ion
batteries (LIB) is highly depending on the used specific
charge/discharge current, since the respective
overpotentials of each electrode affect the two vital
specific energy parameters, specific capacity and voltage.
Focusing on the positive composite electrode as the specific
energy bottleneck, the overall nature of the overpotential
is discussed for the LiNi1/3Co1/3Mn1/3O2 (NCM) active
material. It is shown that the characteristic overpotentials
during charge (delithiation) and discharge (lithiation) is
state of charge (SOC) and depth of discharge (DOD)
dependent, respectively. It was demonstrated that the
discharge characteristics are intertwined with the previous
charge conditions, particularly with the charging time and
the specific charge capacity. Increasing both in parallel
can even lead to a deterioration of the subsequent specific
discharge capacity. Furthermore, Li+ transport pathways
within the NCM composite electrode are discussed and their
influence on the observed overpotential evaluated. Changes
of the overpotential are found to be mainly associated with
changes within the NCM crystal structure, which is
experimentally supported by the correlation of the SOC
dependent overpotential with the XRD determined c-axis
lattice parameter. Consequently, the Li+ transport within
the active material is mostly responsible for limiting the
practically available specific energy.},
cin = {IEK-12},
ddc = {540},
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:000393852200014},
doi = {10.1149/2.0461614jes},
url = {https://juser.fz-juelich.de/record/828980},
}