A Hydrogen Sulfide Fuel Cell Using a Proton‐Conducting Solid Electrolyte

Abstract

A proton‐conducting solid‐state electrolyte composed of has been tested in a medium temperature (∼700°C) fuel cell with as the fuel. Proton conductors are preferred over oxide‐ion conductors for the elimination of as a possible product of the oxidation of . This electrolyte, , had been previously used with as the fuel; its thermodynamic stability in makes it a natural choice for this application. Here we report, with first, crudely prepared electrolytes, open‐circuit voltages of above 1 V, with short‐circuit current densities of above 10 mA/cm2.