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Nanosecond and picosecond laser structuring of electrode materials for lithium-ion batteries

Published online by Cambridge University Press:  15 June 2012

Robert Kohler ,
Johannes Proell ,
Heino Besser ,
Maika Torge ,
Steffen Scholz ,
Todor Dobrev ,
Sven Ulrich  and
Wilhelm Pfleging
Robert Kohler
Affiliation:
Karlsruhe Institute of Technology, Institute for Applied Materials (IAM-AWP) P.O. Box 3640, 76021 Karlsruhe, Germany
Johannes Proell
Affiliation:
Karlsruhe Institute of Technology, Institute for Applied Materials (IAM-AWP) P.O. Box 3640, 76021 Karlsruhe, Germany
Heino Besser
Affiliation:
Karlsruhe Institute of Technology, Institute for Applied Materials (IAM-AWP) P.O. Box 3640, 76021 Karlsruhe, Germany
Maika Torge
Affiliation:
Karlsruhe Institute of Technology, Institute for Applied Materials (IAM-AWP) P.O. Box 3640, 76021 Karlsruhe, Germany
Steffen Scholz
Affiliation:
Manufacturing Engineering Centre, Cardiff University, CF24 3AA, UK
Todor Dobrev
Affiliation:
Manufacturing Engineering Centre, Cardiff University, CF24 3AA, UK
Sven Ulrich
Affiliation:
Karlsruhe Institute of Technology, Institute for Applied Materials (IAM-AWP) P.O. Box 3640, 76021 Karlsruhe, Germany
Wilhelm Pfleging
Affiliation:
Karlsruhe Institute of Technology, Institute for Applied Materials (IAM-AWP) P.O. Box 3640, 76021 Karlsruhe, Germany Karlsruhe Nano Micro Facility, H.-von-Helmholtz-Platz 1, 76344 Egg.-Leopoldshafen, Germany
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Abstract

A comparative study for picosecond and nanosecond laser structuring was performed in order to identify structure geometries and dimensions that efficiently reduce the significant volume changes during electrochemical cycling of SnO2, a promising anode material. Line structures with widths of 20 μm could significantly improve cycling stability of 3 μm thick magnetron sputtered SnO2 thin films. A reduction of structure size led to further improvement of capacity retention. Free-standing conical micro-structures exhibited the best cycling behavior.

Keywords

laser ablationenergy storagethin film
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1388: Symposium F – Mobile Energy , 2012 , mrsf11-1388-f08-04
Copyright
Copyright © Materials Research Society 2012

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References

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