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@ARTICLE{Niemller:848384,
author = {Niemöller, Arvid and Jakes, Peter and Eichel, Rüdiger-A.
and Granwehr, Josef},
title = {{EPR} {I}maging of {M}etallic {L}ithium and ist
{A}pplication to {D}endrite {L}ocalisation in {B}attery
{S}eparators},
journal = {Scientific reports},
volume = {8},
number = {1},
issn = {2045-2322},
address = {London},
publisher = {Nature Publishing Group},
reportid = {FZJ-2018-03625},
pages = {14331},
year = {2018},
abstract = {Conduction Electron Paramagnetic Resonance Imaging (CEPRI)
is presented as a sensitive technique for mapping metallic
lithium species. The method is demonstrated using different
samples that are either thick or thin compared to the
microwave skin depth. As a thin sample, microstructured
metallic lithium deposits in a lithium-ion battery (LIB)
separator were analysed, illustrating the capabilities of
CEPRI by obtaining a high-resolution image with an image
resolution in the micrometre range. Limitations and
intricacies of the method due to non-linear effects caused
by the skin effect are discussed based on images of surface
patterns on thick metallic lithium samples. The lineshape of
the EPR spectrum is introduced as a proxy to determine the
suitability of CEPRI for the quantitative visualisation of
metallic lithium deposits. The results suggest that CEPRI is
particularly suited to analyse the spatial distribution of
microstructured Li that forms during charging and
discharging of LIB cells, including the localization of the
point of failure in the case of an internal cell short
circuit caused by dendrites.},
cin = {IEK-9},
ddc = {000},
cid = {I:(DE-Juel1)IEK-9-20110218},
pnm = {131 - Electrochemical Storage (POF3-131) / HITEC -
Helmholtz Interdisciplinary Doctoral Training in Energy and
Climate Research (HITEC) (HITEC-20170406)},
pid = {G:(DE-HGF)POF3-131 / G:(DE-Juel1)HITEC-20170406},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:30254250},
UT = {WOS:000445570700024},
doi = {10.1038/s41598-018-32112-y},
url = {https://juser.fz-juelich.de/record/848384},
}