| Autor: |
J. M. Rosolen, F. Decker, E. A. Dalchiele |
| Rok vydání: |
1996 |
| Předmět: |
|
| Zdroj: |
AIP Conference Proceedings. |
| ISSN: |
0094-243X |
| DOI: |
10.1063/1.51188 |
| Popis: |
Solid‐state electrochemical cells have been prepared with C60 vacuum‐evaporated thin films, a Li‐ or K‐source counter electrode and a polymer PEO‐LiClO4 (PEO‐KCl) electrolyte. The electrochemical intercalation in C60 of Li+ (or K+) ions has been performed under constant current conditions up to a formal stoichiometry of the fulleride film equal to Li12C60 (K5C60). A complete charge‐transfer process from the intercalated alkali to the alkali‐metal compound has been assumed. Several quasi‐equilibrium potential plateaux were observed during intercalation, that we associate with the coexistence of phases with different intercalant concentration. The electrochemical intercalation process is irreversible to a large extent. Photoelectrochemical spectroscopy of the fulleride films was done ‘‘in‐situ’’ at different moments of the intercalation reaction by illuminating the film electrodes through the transparent and conducting glass substrates. The photoelectrochemical response shows a minimum for x=3 (in the KxC60... |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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