Silver sulfide cathode for liquid ammonia batteries and fuel cells containing sulfur and H.sub.2 S in the electrolyte

An electrochemical cell having an anode and a cathode and using acid acting liquid ammonia electrolytes, comprising:

• a. an insoluble, reducible cathode maerial consisting of a silver sulfide compound,
• b. said acid acting liquid ammonia electrolyte containing sulfur and H.sub.2 S in solution,
• c. said silver sulfide compound being consumed in the cathodic reaction with the silver undergoing the change in oxidation state in accordance with the completely reversible reaction
• Ag.sub.2 S + 2e.sup.-.revreaction. 2Ag + S.sup.-.sup.-
• d. said electronically conducting silver sulfide cathode material which is insoluble in the liquid ammonia being quantitatively reduced therein.