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SYOF: Organische Festkörper

SYOF 5: Poster Session

SYOF 5.24: Poster

Dienstag, 27. März 2001, 17:00–19:00, Aula S3

High charge storage in lithium perylene intercalation compounds — •Rainer Friedlein, Matthias Keil, Xavier Crispin, Sven Stafström, and William R. Salaneck — Department of Physics and Measurement Technology, Linköping University, 58183 Linköping, Sweden

Lithium-doped amorphous and polycrystalline films of the aromatic hydrocarbon perylene, formed by the process of low-temperature vacuum distillation, accept up to one lithium per 3.5± 0.3 carbon atoms. This level corresponds to the formation of the stochiometric compound Li₆(C₂₀H₁₂). The high achievable Li/C ratios combined with a complete charge transfer from the lithium atoms to the molecules and a high binding energy of the dopant-induced valence band electronic states suggest a pronounced capability of small- and medium-size aromatic hydrocarbons for energy storage and battery applications. This property is based on the high electron affinity per carbon atom, which is shown to favor small- and medium-size aromatic systems versus extended graphitic networks.