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High Performance Electrode Architectures By Laser Structuring of Silicon-Graphite Anodes and Ultra-Thick Film NMC-Type Cathode Materials

Pfleging, Wilhelm; Zheng, Yijing; Zhu, Penghui; Meyer, Alexandra; Li, Jianlin; Wood III, David L.; Smyrek, Peter

Abstract:
Laser structuring of battery materials such as electrodes, current collectors, and separator materials becomes more and more a versatile tool for a flexible designing of battery performance with regard to high rate capability, reduced impedance and diffusion over-potential, enhanced battery lifetime, and a tremendous improvement of electrode wetting with liquid electrolyte. Especially structuring of thick film composite electrodes with film thickness up to 300 µm is of great interest for combining high energy and high power applications. Laser ablation by using ultrafast laser radiation ensures a high aspect ratio structuring without damaging or modifying the material properties of the active material, inactive compounds, and current collector. Thermal induced material modification and laser-induced material splatter on top of the electrode surfaces have been so far a major problem by using conventional nanosecond lasers. However, in recent years high power OEM-type ultrafast laser beam sources became available for industrial production. Those lasers provide powers of several 100 W up to the kW-regime with repetition rates of several tenfold MHz, which makes high-speed parallel material processing feasible. ... mehr



Zugehörige Institution(en) am KIT Institut für Angewandte Materialien - Angewandte Werkstoffphysik (IAM-AWP)
Publikationstyp Vortrag
Publikationsdatum 08.10.2020
Sprache Englisch
Identifikator KITopen-ID: 1000126092
HGF-Programm 37.01.02 (POF III, LK 01)
Components and Cells
Veranstaltung Pacific Rim Meeting on Electrochemical and Solid State Science (PRiME 2020), Honolulu, HI, USA, 04.10.2020 – 09.10.2020
Projektinformation DFG, DFG EIN, PF 392/9-1
Bemerkung zur Veröffentlichung Symposium: A01: Intercalation Chemistry for Electrochemical Energy Storage Technologies:

In Honor of M. Stanley Whittingham
Externe Relationen Abstract/Volltext
Schlagwörter lithium nickel manganese cobalt oxide, silicon/graphite anode, ultrafast laser structuring, ultra-thick film electrodes, 3D electrode architecture, lithium-ion battery, laser-induced breakdown spectroscopy, cell degradation
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