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Laser structuring of NMC 811 high energy electrodes in battery production for enhancing the electrochemical performance for xEV energy storage systems

Eschelmüller, B.; Froehlich, K.; Pessenhofer, W.; Besser, H.; Pfleging, W. ORCID iD icon; Jahn, M.; Pichler, F.


Layered oxide cathodes, especially thick-film electrodes like lithium nickel manganese cobalt oxide, NMC, are under continuously investigation to meet the ambitious requirements, e.g. 700 Wh/l, for future Li-ion batteries in electric drive applications. The objective of the most current studies is to reduce the Co content with a concurrent increasing Ni-content in the NMC cathodes such as NMC 811 [1]. It must not leave the fact out of consideration, that NMC cathodes suffer from low high rate capability and corresponding low capacity retention at high C-rates. In particular, the negative impact is even higher for thick-film high energy cathodes. To counteract the negative effect, high repetition ultrafast laser ablation is applied to create appropriate 3D electrode designs [2]. New Li+-diffusion pathways, applied by the laser structuring process, shell enhance electrolyte wettability and reduce overpotentials at high C-rates. It is attempted to integrate the laser structuring into a continuous roll-to-roll electrode production process. In this way, the positive properties achieved through 3D structuring can also be obtained for Li-ion batteries that are produced on a large scale. ... mehr

Preprint §
DOI: 10.5445/IR/1000141208
Veröffentlicht am 03.04.2023
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien – Angewandte Werkstoffphysik (IAM-AWP)
Publikationstyp Proceedingsbeitrag
Publikationsdatum 24.08.2021
Sprache Englisch
Identifikator ISBN: 978-80-214-5975-5
KITopen-ID: 1000141208
HGF-Programm 38.02.02 (POF IV, LK 01) Components and Cells
Erschienen in 22nd International Conference Advanced Batteries, Accumulators and Fuel Cells
Veranstaltung 22nd International Conference Advanced Batteries, Accumulators and Fuel Cells (ABAF 22 2021), Brünn, Tschechien, 22.08.2021 – 25.08.2021
Verlag Brno University of Technology
Seiten 15-16
Serie 22nd International Conference Advanced Batteries, Accumulators and Fuel Cells ; 22nd
Projektinformation RealLi (FFG-AT, 873396)
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