Journal Article

FZJ-2019-00089

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png In operando EPR investigation of redox mechanisms in LiCoO2

Niemöller, A. (Corresponding author)FZJ* ; Jakes, P.FZJ* ; Eichel, R.-A.FZJ*RWTH* ; Granwehr, J.FZJ*RWTH*

2019
Elsevier Amsterdam [u.a.]

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Please use a persistent id in citations: doi:10.1016/j.cplett.2018.12.022

Abstract: 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.

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Contributing Institute(s):

1. Grundlagen der Elektrochemie (IEK-9)

Research Program(s):

1. 131 - Electrochemical Storage (POF3-131) (POF3-131)

Appears in the scientific report 2019

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Database coverage:
; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; NCBI Molecular Biology Database ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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