%0 Journal Article
%A Niemöller, Arvid
%A Jakes, Peter
%A Eichel, Rüdiger-A.
%A Granwehr, Josef
%T In operando EPR investigation of redox mechanisms in LiCoO2
%J Chemical physics letters
%V 716
%@ 0009-2614
%C Amsterdam [u.a.]
%I Elsevier
%M FZJ-2019-00089
%P 231 - 236
%D 2019
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000456799900037
%R 10.1016/j.cplett.2018.12.022
%U https://juser.fz-juelich.de/record/859199