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Ultrafast laser ablation of aqueous processed thick-film Li(Ni$_{0.6}$Mn$_{0.2}$Co$_{0.2}$)$_{O2}$ cathodes with 3D architectures for lithium-ion batteries

Zhu, Penghui 1; Meyer, Alexandra ORCID iD icon 1; Pfleging, Wilhelm ORCID iD icon 1; Kling, Rainer [Hrsg.]; Watanabe, Akira [Hrsg.]
1 Institut für Angewandte Materialien – Angewandte Werkstoffphysik (IAM-AWP), Karlsruher Institut für Technologie (KIT)

Abstract:

Lithium-ion batteries have dominated the field of electrochemical energy storage for years due to their high energy density. Recently, with the rapid development of E-mobility, the quest for high power and high energy batteries with reduced production costs has aroused great interest and is still a huge challenge. The energy density at battery level can be increased by using electrodes with thicknesses > 150 μm. However, capacity fade of thick-film electrodes at C-rates > C/2 is observed. To compensate the capacity loss, 3D architectures with a high aspect ratio are produced using ultrafast laser ablation. In addition, aqueous processing of cathodes using water-based binders can achieve environmentally friendly production and cost reduction by replacing the conventional organic PVDF binder and the toxic and volatile NMP solvent. However, the pH value of aqueous processed cathode slurries increases to 12 due to the reaction between active material and water, which decreases the specific capacity of the cells and on the other side results in chemical corrosion of the current collector during casting. In order to determine the optimal pH range and avoid the damage of the current collector, slurries with pH values ranging from 8 to 12 are manufactured. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000143747
Veröffentlicht am 06.12.2022
Preprint §
DOI: 10.5445/IR/1000143747/pre
Veröffentlicht am 06.12.2022
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien – Angewandte Werkstoffphysik (IAM-AWP)
Publikationstyp Proceedingsbeitrag
Publikationsdatum 04.03.2022
Sprache Englisch
Identifikator ISBN: 978-1-5106-4850-0
KITopen-ID: 1000143747
HGF-Programm 38.02.02 (POF IV, LK 01) Components and Cells
Erschienen in Laser-based Micro- and Nanoprocessing XVI
Veranstaltung 15 Laser-based Micro- and Nanoprocessing XVI (2022), San Francisco, CA, USA, 25.01.2022 – 27.01.2022
Verlag SPIE
Serie Proceedings ; 11989
Projektinformation Next-Gen-3DBat (BMBF, 03XP0198F)
Schlagwörter 3D battery, laser ablation, thick-film electrode, aqueous processing, NMC cathode, pH adjustment
Nachgewiesen in Dimensions
Scopus
Globale Ziele für nachhaltige Entwicklung Ziel 7 – Bezahlbare und saubere EnergieZiel 12 – Nachhaltiger Konsum und Produktion
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