%0 Journal Article
%A Ahrens, Lara
%A Mikulics, Martin
%A Schröder, Steffen
%A Mayer, Joachim
%A Hardtdegen, Hilde Helen
%T Laser-Micro-Annealing of Microcrystalline Ni-Rich NCM Oxide: Towards Micro-Cathodes Integrated on Polyethylene Terephthalate Flexible Substrates
%J Materials
%V 18
%N 3
%@ 1996-1944
%C Basel
%I MDPI
%M FZJ-2025-01776
%P 680 -
%D 2025
%Z This research was funded by the Joint Lab for Integrated Model and Data-Driven Material Characterization (MDMC) of the Helmholtz Association.
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%$ 39942346
%U <Go to ISI:>//WOS:001420208300001
%R 10.3390/ma18030680
%U https://juser.fz-juelich.de/record/1039732