FROM MODEL SOLID-STATE PROTONIC CONDUCTORS TO NEW POLYMER ELECTROLYTES

We investigate anhydrous salts belonging to the XHSO4 family where the nature of X can be varied over a very large chemical range going from simple alkali cations (Cs+), to protonated amines (pyridine, triethylenediamine,/etc.) and to polymers presenting amine groups: branched poly(ethyleneimine) (BPEI) or poly(acrylamide) (Paam). The first two types of compounds correspond to well-defined and relatively simple salts. They constitute interesting model systems for the study of conductivity mechanisms. Their structural and dynamical properties studied by impedance, infrared and neutron spectroscopies are shortly reviewed. The information obtained on these systems has allowed us to prepare new compounds of the polymer electrolyte type.