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@INPROCEEDINGS{Eichel:151899,
author = {Eichel, Rüdiger-A. and Jakes, Peter and Granwehr, Josef},
title = {{E}lectron {P}aramagnetic {R}esonance {S}pectroscopy –
{E}lectrochemistry on an {A}tomic {S}cale},
reportid = {FZJ-2014-01749},
year = {2014},
abstract = {Electron Paramagentic resonance (EPR) spectroscopy is a
sensitive tool to probe structural and electronic properties
of paramagnetic centers. Focusing on the study of
Lithium-ion batteries, this involves the monitoring of
changes in oxidation states of transition-metal ions upon
Lithium (de)intercalation, as well as the anti-site
diffusion of these centers as a function of extended cycling
and the formation of radical centers in the
solid-electrolyte interphase layer. In the case of metal-air
batteries, also the oxygen reduction / evolution catalyst
can be monitored during operation. The information obtained,
typically extends over the complete volume of a sample. In
certain cases, however, also interphase-sensitive
experiments can be performed. Temperature-dependent EPR
experiments typically allow to asses also dynamic
properties, by exploiting the variation of the EPR
susceptibility that can be used to estimate activation
barriers for ionic motion. Information on electronic
conductivities can be gathered by analyzing anisotropic
line-shape functions, such as the Dysonian line shape for
instance. References [1] P. Jakes, G. Cohn, Y. Ein-Eli, F.
Scheiba, H. Ehrenberg, R.-A. Eichel: „Limitation of
Discharge Capacity and Mechanisms of Air-Electrode
Deactivation in Silicon–Air Batteries“, Chem. Sus. Chem.
5 (2012) 2278–2285 [2] P. Jakes, E. Erdem, A. Ozarowski,
J. van Tol, R. Buckan, D. Mikhailova, H. Ehrenberg, R.-A.
Eichel: “Local coordination of Fe3+ in Li[Co0.98Fe0.02]O2
as cathode material for lithium ion
batteries—multi-frequency EPR and Monte-Carlo
Newman-superposition model analysis“, Phys. Chem. Chem.
Phys. 13 (2011) 9344–9352 [3] E. Erdem, V. Mass, A.
Gembus, A. Schulz, V. Liebau-Kunzmann, C. Fasel, R. Riedel,
R.-A. Eichel: “Defect structure in lithium-doped
polymer-derived SiCN ceramics characterized by Raman and
electron paramagnetic resonance spectroscopy“, Phys. Chem.
Chem. Phys. 11 (2009) 5628–5633},
month = {Mar},
date = {2014-03-23},
organization = {556. WE Heraeus-Seminar; Analytical
Tools for Fuel Cells and Batteries,
Physikzentrum Bad Honnef (Germany), 23
Mar 2014 - 25 Mar 2014},
subtyp = {Invited},
cin = {IEK-9},
cid = {I:(DE-Juel1)IEK-9-20110218},
pnm = {123 - Fuel Cells (POF2-123) / 152 - Renewable Energies
(POF2-152)},
pid = {G:(DE-HGF)POF2-123 / G:(DE-HGF)POF2-152},
typ = {PUB:(DE-HGF)6},
url = {https://juser.fz-juelich.de/record/151899},
}