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Front Cover: Exploiting the Degradation Mechanism of NCM523 ∥ Graphite Lithium‐Ion Full Cells Operated at High Voltage (ChemSusChem 2/2021)
Author(s) -
Klein Sven,
Bärmann Peer,
Beuse Thomas,
Borzutzki Kristina,
Frerichs Joop Enno,
Kasnatscheew Johannes,
Winter Martin,
Placke Tobias
Publication year - 2021
Publication title -
chemsuschem
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.202002871
Subject(s) - separator (oil production) , cathode , anode , electrolyte , graphite , materials science , chemical engineering , lithium metal , dissolution , lithium (medication) , inorganic chemistry , chemistry , electrode , composite material , thermodynamics , medicine , physics , engineering , endocrinology
The Front Cover shows the cross‐talk phenomena in high‐voltage NCM523 graphite lithium ion battery cells, that is, the dissolution of transition metals (Mn, Co, Ni) from the NCM523 cathode and subsequent deposition at the graphite anode. These deposits induce alteration of the solid electrolyte interphase (SEI), significant SEI growth, and formation of Li metal dendrites. This study unravels the “rollover” failure of NCM523 graphite cells operated at 4.5 V, which is due to the generation of (micro‐)short circuits from Li metal dendrites growing through the separator to the cathode. More information can be found in the Full Paper by S. Klein et al.