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037 _ _ |a FZJ-2024-00478
100 1 _ |a Ahrens, Lara
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111 2 _ |a Microscopy Conference 2023
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|c Dramstadt
|d 2023-02-26 - 2023-03-02
|w Fed Rep Germany
245 _ _ |a Understanding of the Degradation and Aging Mechanisms in Ni-rich NMC at Nanoscale
260 _ _ |c 2023
336 7 _ |a Conference Paper
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520 _ _ |a 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).
536 _ _ |a 1223 - Batteries in Application (POF4-122)
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700 1 _ |a Meledina, Maria
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700 1 _ |a Basak, Shibabrata
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700 1 _ |a Eichel, Rüdiger-A.
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700 1 _ |a Mayer, Joachim
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910 1 _ |a Forschungszentrum Jülich
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910 1 _ |a Central Facility for Electron Microscopy (GFE), RWTH Aachen University
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910 1 _ |a RWTH Aachen
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913 1 _ |a DE-HGF
|b Forschungsbereich Energie
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