ELECTROCHEMICAL-BEHAVIOR OF PROTON-VACANCY CONDUCTING POLYMERS BASED ON POLY(OXYETHYLENE), POE, AND SULFAMIDE, NH2SO2NH2

The electrochemical stability of a series of so-called Basic Proton Co nducting Polymers (or Proton-Vacancy Conducting Polymers) based on a s olvating polymer (POE, poly(oxyethylene)), sulfamide and a doping agen t (guanidinium cation, working as proton-vacancy inducer) is investiga ted using for the purpose cyclic voltammetry. The study presented here concerns doped and undoped samples of the P(OE)(n)NH2SO2NH2 system (w here n=O/S stands as the ratio of monomer units per sulfamide molecule ). Experimental data obtained at high sulfamide concentration (most pr omissing materials in terms of conductivity) and two different doping levels N/H=1 and 10% (where N/H represents the ratio of guanidine mole cules added per proton extracted) indicate that the electrochemical st ability range of the undoped materials is close to 1.7 V. Preliminary results suggest that the presence of the guanidinium based dopant is r esponsible for an oxydation reaction which limits the electroactivity domain on the anodic side.