guest ::
| Home > Publications database > Understanding of the Degradation and Aging Mechanisms in Ni-rich NMC at Nanoscale |
| Home > Publications database > Understanding of the Degradation and Aging Mechanisms in Ni-rich NMC at Nanoscale |
| Conference Presentation (After Call) | FZJ-2024-00478 |
; ; ; ;
2023
Abstract: 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).
|
The record appears in these collections: |