TY  - JOUR
AU  - Niemöller, Arvid
AU  - Jakes, Peter
AU  - Eichel, Rüdiger-A.
AU  - Granwehr, Josef
TI  - In operando EPR investigation of redox mechanisms in LiCoO2
JO  - Chemical physics letters
VL  - 716
SN  - 0009-2614
CY  - Amsterdam [u.a.]
PB  - Elsevier
M1  - FZJ-2019-00089
SP  - 231 - 236
PY  - 2019
AB  - Electron paramagnetic resonance (EPR) spectroscopy was utilized in operando to analyze redox mechanisms in lithium cobalt oxide (LCO) cathode material during battery cycling. In the pristine battery, a considerable amount of paramagnetic Co2+ was detected that was formed during initial contact of the electrolyte with the LCO. The Co2+ got oxidized during the formation cycle. The absence of an EPR signal during subsequent battery cycles, irrespective of the state-of-charge, indicates that no EPR active Co4+ is formed. This suggests the presence of an anionic oxygen redox mechanism in the active material.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000456799900037
DO  - DOI:10.1016/j.cplett.2018.12.022
UR  - https://juser.fz-juelich.de/record/859199
ER  -