Title :
Electrical and dielectric measurements in conducting poly(ethylene oxide)-based electrolytes
Author :
Pissis, P. ; Laudat, J. ; Tnonos, C. ; Apekis, L. ; Kyritsis, A.
Author_Institution :
Dept. of Phys., Nat. Tech. Univ. of Athens, Greece
Abstract :
We report on electrical and dielectrical measurements on several PEO-salt complexes (pure PEO and PEO with 5 and 18% KSCN, 1 and 5% Ba(SCN)2, 3 and 18% NaSCN, 10% KBr, compositions given in terms of the proportion in moles between the polymer repeat unit (-CH 2CH2O-) and the salt) by means of thermally stimulated depolarization currents (TSDC), polarization currents (TSPC), DC conductivity techniques in the temperature range 77-300 K and of impedance spectroscopy techniques (5 Hz-13 MHz, 200-400 K). Four relaxation mechanisms have been detected. The main relaxation mechanism associated with the glass transition is studied in some detail. The glass transition shifts to higher temperatures by complexation
Keywords :
conducting polymers; dielectric depolarisation; dielectric polarisation; dielectric relaxation; electrets; electric impedance; electrical conductivity; glass transition; solid electrolytes; thermally stimulated currents; 5 Hz to 13 MHz; 77 to 400 K; DC conductivity; complexation; conducting poly(ethylene oxide)-based electrolytes; dielectric measurements; electrets; glass transition; impedance spectroscopy; polarization currents; polymer repeat unit; relaxation mechanism; thermally stimulated depolarization currents; Conductivity measurement; Current measurement; Dielectric measurements; Electric variables measurement; Glass; Impedance measurement; Polarization; Polymers; Temperature distribution; Thermal conductivity;
Conference_Titel :
Electrets, 1994. (ISE 8), 8th International Symposium on
Conference_Location :
Paris
Print_ISBN :
0-7803-1940-0
DOI :
10.1109/ISE.1994.514800
