| abstract |
The electrochemical cell is formed of two symmetrical electrodes 13 and a solid polymer electrolyte 15 disposed therebetween. Symmetrical electrodes, i.e., anodes and cathodes, are made of, for example, ruthenium, iridium, cobalt, zinc, bismuth, cadmium, silver, and their oxides. The solid polymer electrolyte 15 is first made in a polymeric support structure, for example, polyvinyl alcohol, in contact with each anode and cathode and in which the proton conducting electrolyte active species is dispersed. |