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Proceedings Paper

Laser-printed/structured thick-film electrodes for Li-ion microbatteries
Author(s): Heungsoo Kim; Thomas E. Sutto; Johannes Proell; Robert Kohler; Wilhelm Pfleging; Alberto Piqué
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Paper Abstract

Laser induced forward transfer (LIFT) process was used to print thick-film electrodes (LiCoO2 cathode and carbon anode) and solid-state polymer membranes for Li-ion microbatteries. Their electrochemical behaviors were characterized by cyclic voltammograms, capacity measurement and cycling performance. Microbatteries based on these laser-printed thick-film electrodes showed significantly higher discharge capacities than those made by sputter-deposited thin film techniques. This enhanced performance is attributed to the high surface area porous structure of the laser-printed electrodes that allows improved diffusion of the Li-ions across the 100 μm-thick electrodes without a significant internal resistance. In addition, a laser structuring process was used to prepare three-dimensional microstructures on the laserprinted thick-film electrodes to further improve battery performance by increasing the active surface area. These results indicate that the laser processing techniques are a viable approach for developing Li-ion microbatteries in microelectronic devices. This paper will show examples of Li-ion microbatteries fabricated with various polymer separators and structured electrodes using a combination of LIFT and excimer laser structuring processes.

Paper Details

Date Published: 6 March 2014
PDF: 9 pages
Proc. SPIE 8968, Laser-based Micro- and Nanoprocessing VIII, 89680L (6 March 2014); doi: 10.1117/12.2037287
Show Author Affiliations
Heungsoo Kim, U.S. Naval Research Lab. (United States)
Thomas E. Sutto, U.S. Naval Research Lab. (United States)
Johannes Proell, Karlsruhe Institute of Technology (Germany)
Robert Kohler, Karlsruhe Institute of Technology (Germany)
Wilhelm Pfleging, Karlsruhe Institute of Technology (Germany)
Karlsruhe Nano Micro Facility (Germany)
Alberto Piqué, U.S. Naval Research Lab. (United States)


Published in SPIE Proceedings Vol. 8968:
Laser-based Micro- and Nanoprocessing VIII
Udo Klotzbach; Kunihiko Washio; Craig B. Arnold, Editor(s)

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