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Proceedings Paper

Laser-induced self-organizing surface structures on cathode materials for lithium-ion batteries
Author(s): R. Kohler; J. Pröll; M. Bruns; T. Scherer; H. J. Seifert; W. Pfleging
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Paper Abstract

Rechargeable lithium-ion batteries have emerged as an attractive power source for a wide variety of applications, in particular for portable electronics. The development and modification of electrode materials is a major issue for the improvement of energy density and power density of lithium-ion batteries. For this purpose, laser-induced self-organizing surface structures were generated using UV-excimer laser radiation with a wavelength of 248 nm and a pulse width of 4-6 ns. The self-organization process was applied for thin films made of lithium cobalt oxide with a thickness of about 3 μm. In order to identify the chemical changes due to laser processing time-of-flight secondary ion mass spectroscopy measurements were performed. It was found that this process can be linked to a decomposition of the electrode material forming a lithium oxide surface layer. Similar self-organized surface structures could also be obtained for thick film electrode materials consisting of LiCoO2 powder mixed with binder and carbon black which were tape-casted onto aluminium foils. The thickness of these films was in the range of 50 - 100 μm.

Paper Details

Date Published: 15 March 2013
PDF: 6 pages
Proc. SPIE 8608, Laser-based Micro- and Nanopackaging and Assembly VII, 860806 (15 March 2013); doi: 10.1117/12.2006372
Show Author Affiliations
R. Kohler, Karlsruhe Institute of Technology (Germany)
J. Pröll, Karlsruhe Institute of Technology (Germany)
M. Bruns, Karlsruhe Institute of Technology (Germany)
T. Scherer, Karlsruhe Institute of Technology (Germany)
H. J. Seifert, Karlsruhe Institute of Technology (Germany)
W. Pfleging, Karlsruhe Institute of Technology (Germany)
Karlsruhe Nano Micro Facility (Germany)

Published in SPIE Proceedings Vol. 8608:
Laser-based Micro- and Nanopackaging and Assembly VII
Udo Klotzbach; Yongfeng Lu; Kunihiko Washio, Editor(s)

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