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Licensed Unlicensed Requires Authentication Published by De Gruyter June 11, 2013

Development of high power density cathode materials for Li-ion batteries

  • Bernt Ketterer , Hristina Vasilchina , Klaus Seemann , Sven Ulrich , Heino Besser , Wilhelm Pfleging , Tatjana Kaiser and Christel Adelhelm

Abstract

Cathode material for Li-ion batteries can be synthesised by r.f. magnetron sputtering of LiCoO2 targets in a pure Ar plasma. This technique is suitable for large-scale implementation in foil coating set-ups. By choosing the process parameters and by employing post heat treatment nanocrystalline, stoichiometrical LiCoO2 films can be fabricated which exhibit the desired high temperature phase. The determination of the elementary composition is possible by optical emission spectroscopy including plasma stimulation and carrier gas temperature extraction. The proof of crystal structure is carried out by X-ray diffraction and Raman spectroscopy. Heat treatment can be conventionally realised in a furnace or by laser impact. With regard to increasing the power density, the surface of the cathode material can be enhanced six-fold by laser-assisted surface patterning.


* Correspondence address, Dr. Sven Ulrich, Forschungszentrum Karlsruhe, IMF I, Postfach 36 40, D-76021 Karlsruhe, Germany, Tel.: +49 7247 82 3398, Fax: +49 7247 82 4567, E-mail:

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Received: 2008-4-11
Accepted: 2008-7-25
Published Online: 2013-06-11
Published in Print: 2008-10-01

© 2008, Carl Hanser Verlag, München

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