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001039732 1001_ $$0P:(DE-Juel1)190423$$aAhrens, Lara$$b0$$ufzj
001039732 245__ $$aLaser-Micro-Annealing of Microcrystalline Ni-Rich NCM Oxide: Towards Micro-Cathodes Integrated on Polyethylene Terephthalate Flexible Substrates
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001039732 500__ $$aThis research was funded by the Joint Lab for Integrated Model and Data-Driven Material Characterization (MDMC) of the Helmholtz Association.
001039732 520__ $$aHere in this work, we report on micro-Raman spectroscopy investigations performed on freestanding Ni-rich NCM (LixNi0.83Co0.11Mn0.06O2) microcrystals transferred to flexible polyethylene terephthalate (PET) host substrates. This technological procedure introduces a first building block for future on-chip-integrated micro-accumulators for applications in flexible optoelectronics, sensors, microbiology, and human medicine. An after-synthesis thermal treatment was used to help improve the material homogeneity and perfection of the cathode material. To this end, a local laser micro-annealing process was applied to the freestanding Ni-rich NCM microcrystals. The thermally initialized structural processes in the singular micro-cathode units were characterized and determined by micro-Raman spectroscopy. Micro-Raman mapping images revealed the evolution of a recrystallization process after the local annealing procedure. Furthermore, laser micro-annealing led to the suppression of the pristine “polycrystalline morphology” of the investigated micro-cathode regions. Besides the dominant characteristic Raman mode at ~1085 cm−1, most likely ascribed to lithium carbonate, metal oxides with Raman modes around ~550 cm−1 were identified. This highly efficient transfer and integration technology represents a basic building block towards micrometer-sized accumulators for a large range of emerging applications.
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001039732 7001_ $$0P:(DE-Juel1)128613$$aMikulics, Martin$$b1$$eCorresponding author$$ufzj
001039732 7001_ $$0P:(DE-HGF)0$$aSchröder, Steffen$$b2
001039732 7001_ $$0P:(DE-Juel1)130824$$aMayer, Joachim$$b3$$ufzj
001039732 7001_ $$0P:(DE-Juel1)125593$$aHardtdegen, Hilde Helen$$b4$$eCorresponding author
001039732 773__ $$0PERI:(DE-600)2487261-1$$a10.3390/ma18030680$$gVol. 18, no. 3, p. 680 -$$n3$$p680 -$$tMaterials$$v18$$x1996-1944$$y2025
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