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Proceedings Paper

Fs-laser microstructuring of laser-printed LiMn2O4 electrodes for manufacturing of 3D microbatteries
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Paper Abstract

Lithium manganese oxide composite cathodes are realized by laser-printing. The printed cathode is a composite and consists of active powder, binder and conductive agents. Laser-printed cathodes are first calendered and then laser structured using femtosecond-laser radiation in order to form three-dimensional (3D) micro-grids in the cathode material. Three-dimensional micro-grids in calendered/laser structured cathodes exhibit improved discharge capacity retention at a 1 C discharging rate. Calendered but unstructured cathodes indicate the poorest cycling behavior at 1 C discharge. The improved capacity retention and the reduced degradation of calendered/structured cathodes can be attributed to both the increased electrical contact through calendering as well as shortened Li-ion pathways due to laser-induced 3D microgrids.

Paper Details

Date Published: 6 March 2014
PDF: 6 pages
Proc. SPIE 8968, Laser-based Micro- and Nanoprocessing VIII, 896805 (6 March 2014); doi: 10.1117/12.2039902
Show Author Affiliations
J. Pröll, Karlsruhe Institute of Technology (Germany)
H. Kim, U.S. Naval Research Lab. (United States)
M. Mangang, Karlsruhe Institute of Technology (Germany)
H. J. Seifert, Karlsruhe Institute of Technology (Germany)
A. Piqué, U.S. Naval Research Lab. (United States)
W. Pfleging, Karlsruhe Institute of Technology (Germany)
Karlsruhe Nano Micro Facility (Germany)

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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