J. Phys. IV France 7 (1997) C2-1195-C2-1196
EXAFS Study of Ca(SO3Cl)2 Salt and PEO Based Polymer Film Doped with Ca(SO3Cl)2I. Arcon1, M. Kovac2, A. Kodre1, S. Pejovnik2 and J. Feldhaus3
1 Jozef Stefan Institute, Jamova 39, P.P. 3000, 1001 Ljubljana, Slovenia and Department of Physics, University of Ljubljana, Slovenia
2 National Institute of Chemistry, Hajdrihova 19, Ljubljana, Slovenia
3 Hamburger Synchrotronstrahlungslabor, DESY, Notkestrasse 85, 22603 Hamburg, Germany
Ca(SO3Cl)2 is synthesised via a new procedure using CaCl2, SOCl2 and chlorosulphuric acid. The synthesised salt is used in preparation of ion conducting electrolyte (PEO)4Ca(SO3Cl)2 film. Ca K-edge EXAFS results show that in the chlorosulphate salt Ca is coordinated to the tetrahedron of SO3Cl- group. In the film, the bond is preserved : an additional strong bond to the ether oxygen of the polymer host is observed. Consequently the chlorosulphate salt is poorly dissociated, which explains relatively low electric conductivity of the film.
© EDP Sciences 1997