Which electrolyte is used in an alkali fuel cell?

a high-temperature carbonate salt mixture

a solid polymer

a solid ceramic metal oxide compound

an aqueous potassium hydroxide solution

Answer: an aqueous potassium hydroxide solution

An alkaline fuel cell is a zero-emission device whose one major component is the electrolyte. An electrolyte, on the other hand, is a solution that is able to conduct electricity. In an alkaline fuel cell. The electrolyte is an alkaline liquid, and potassium hydroxide also known as KOH is the only alkaline liquid among the choices.