TY  - JOUR
AU  - Ahrens, Lara
AU  - Mikulics, Martin
AU  - Schröder, Steffen
AU  - Mayer, Joachim
AU  - Hardtdegen, Hilde Helen
TI  - Laser-Micro-Annealing of Microcrystalline Ni-Rich NCM Oxide: Towards Micro-Cathodes Integrated on Polyethylene Terephthalate Flexible Substrates
JO  - Materials
VL  - 18
IS  - 3
SN  - 1996-1944
CY  - Basel
PB  - MDPI
M1  - FZJ-2025-01776
SP  - 680 -
PY  - 2025
N1  - This research was funded by the Joint Lab for Integrated Model and Data-Driven Material Characterization (MDMC) of the Helmholtz Association.
AB  - Here in this work, we report on micro-Raman spectroscopy investigations performed on freestanding Ni-rich NCM (LixNi0.83Co0.11Mn0.06O2) microcrystals transferred to flexible polyethylene terephthalate (PET) host substrates. This technological procedure introduces a first building block for future on-chip-integrated micro-accumulators for applications in flexible optoelectronics, sensors, microbiology, and human medicine. An after-synthesis thermal treatment was used to help improve the material homogeneity and perfection of the cathode material. To this end, a local laser micro-annealing process was applied to the freestanding Ni-rich NCM microcrystals. The thermally initialized structural processes in the singular micro-cathode units were characterized and determined by micro-Raman spectroscopy. Micro-Raman mapping images revealed the evolution of a recrystallization process after the local annealing procedure. Furthermore, laser micro-annealing led to the suppression of the pristine “polycrystalline morphology” of the investigated micro-cathode regions. Besides the dominant characteristic Raman mode at ~1085 cm−1, most likely ascribed to lithium carbonate, metal oxides with Raman modes around ~550 cm−1 were identified. This highly efficient transfer and integration technology represents a basic building block towards micrometer-sized accumulators for a large range of emerging applications.
LB  - PUB:(DE-HGF)16
C6  - 39942346
UR  - <Go to ISI:>//WOS:001420208300001
DO  - DOI:10.3390/ma18030680
UR  - https://juser.fz-juelich.de/record/1039732
ER  -