TY  - CONF
AU  - Ahrens, Lara
AU  - Meledina, Maria
AU  - Basak, Shibabrata
AU  - Eichel, Rüdiger-A.
AU  - Mayer, Joachim
TI  - Understanding of the Degradation and Aging Mechanisms in Ni-rich NMC at Nanoscale
M1  - FZJ-2024-00478
PY  - 2023
AB  - Ni-rich NMC (NixMnyCo1-x-yO2 with x > 0.8) has been a promising candidate for cathode active materials (CAMs) in Li-ion batteries (LIBs) [1,2]. Reducing the Cobalt content in NMC cathodes leads to a more environment-friendly and affordable material. Also, the specific capacity of Ni-rich NMC is significantly increased compared to conventional NMC material. However, the cycle stability is reduced. To improve the lifetime of Ni-rich NMCs, it is important to gain a deeper understanding of the degradation- and aging mechanisms appearing during material synthesis and cycling. Therefore, studies of the micro- and nanostructure are key for tailoring material properties specifically, for instance through doping or coating.Modern focused-ion-beam (FIB) preparation allows cutting of extremely thin samples, enabling high-resolution imaging. Figure 1 shows a lamella of a polycrystalline Ni-rich NMC particle, which was prepared by FIB and a corresponding HRSTEM image of a layered structure. In addition to ex-situ experiments on the atomic scale, in-situ experiments play a key role in understanding degradation and aging mechanisms in LIBs [3,4]. By applying voltage or temperature more realistic scenarios can be represented. Therefore, we focus both on ex-situ and on in-situ setups (Figure 2).
T2  - Microscopy Conference 2023
CY  - 26 Feb 2023 - 2 Mar 2023, Dramstadt (Fed Rep Germany)
Y2  - 26 Feb 2023 - 2 Mar 2023
M2  - Dramstadt, Fed Rep Germany
LB  - PUB:(DE-HGF)6
UR  - https://juser.fz-juelich.de/record/1021018
ER  -