An Anhydrous Proton-Conducting Material Prepared by Hybridizing Zinc Phosphate Glass with Imidazole

An intermediate temperature proton-conducting amorphous material was prepared utilizing the reaction of zinc metaphosphate glass powders with imidazole. The anhydrous material, consisting of Zn-coordinated imidazole and imidazole/phosphoric acid composite groups with imidazole, showed no decrease in weight even after heating at . It showed high electrical conductivities of at the temperature range of . The activation energy for electrical conduction was close to that for proton transport between basic heterocycle molecules. A fuel cell test using the material as the electrolyte showed an output power of at .