Regensburg 2010 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 58: Topical Session Battery Materials IV

MM 58.4: Vortrag

Donnerstag, 25. März 2010, 17:00–17:15, H6

Metallocene-based nanocomposites as cathode materials in lithium batteries — •Raju Prakash, Clemens Wall, and Maximilian Fichtner — Karlsruhe Institute of Technology (KIT), Institute of Nanotechnology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany

Lithium-ion batteries have been the most utilized batteries in the portable electronic market since many years. But their performance still lies behind the demands of the consumer. New electrode materials with high specific capacities are necessary to meet these demands. Metal fluorides have high theoretical specific capacity based on a novel conversion mechanism, making them promising cathode materials for high performance lithium-ion batteries. However, the metal fluoride cathodes are still hampered by loss of capacity and cyclic instability. Hence, a new approach such as encapsulation of active materials in nanotubes or carbon-coating, etc. is needed in order to improve their performance.

Herein, we present a simple method based on the thermal decomposition of a metallocene/LiF mixture to produce inexpensive cathode materials which exhibit a good cyclic stability and reversibility. The detailed structural investigations of the nanocomposites as well as their electrochemical performances will be presented.