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@ARTICLE{Wandt:202229,
author = {Wandt, Johannes and Marino, Cyril and Gasteiger, Hubert A.
and Jakes, Peter and Eichel, Rüdiger-A. and Granwehr,
Josef},
title = {{O}perando electron paramagnetic resonance spectroscopy –
formation of mossy lithium on lithium anodes during
charge–discharge cycling},
journal = {Energy $\&$ environmental science},
volume = {8},
number = {4},
issn = {1754-5706},
address = {Cambridge},
publisher = {RSC Publ.},
reportid = {FZJ-2015-04518},
pages = {1358 - 1367},
year = {2015},
abstract = {The formation of mossy lithium and lithium dendrites so far
prevents the use of lithium metal anodes in lithium ion
batteries. To develop solutions for this problem (e.g.,
electrolyte additives), operando measurement techniques are
required to monitor mossy lithium and dendrite formation
during electrochemical cycling. Here we present a novel
battery cell design that enables operando electron
paramagnetic resonance (EPR) spectroscopy. It is shown that
time-resolved operando EPR spectroscopy during
electrochemical cycling of a lithium-metal/LiFePO4 (LFP)
cell provides unique insights into the lithium
plating/dissolution mechanisms, which are consistent with ex
situ scanning electron microscopy (SEM) analysis. To
demonstrate the viability of the operando EPR method, two
cells using different electrolytes were studied. When using
an electrolyte containing fluoroethylene carbonate (FEC)
additive, a higher reversibility of the lithium anode and
reduced formation of micro-structured (mossy/dendritic)
lithium were observed.},
cin = {IEK-9},
ddc = {690},
cid = {I:(DE-Juel1)IEK-9-20110218},
pnm = {131 - Electrochemical Storage (POF3-131)},
pid = {G:(DE-HGF)POF3-131},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000352275500024},
doi = {10.1039/C4EE02730B},
url = {https://juser.fz-juelich.de/record/202229},
}