alkaline fuel cell (AFC)
The alkaline fuel cell( AFC) is a low-temperature fuel cell whose electrolyte is potassium hydroxide solution and which is operated with pure hydrogen and oxygen.
The operating temperature of the AFC fuel cell is between 60 °C and 100 °C. The cell voltage is less than 1 V, and its efficiency is about 70 %. It is thus considerably more efficient than other fuel cells. In addition to hydrogen, the AFC fuel cell can also be operated with ammonia or hydrazine. The corresponding versions are called ammonia fuel cells and hydrazine fuel cells.
The power generation of the AFC fuel cell is based on a redox reaction between hydrogen and oxygen. The AFC fuel cell uses a potassium hydroxide solution as electrolyte. The redox reaction is characterized by an electron transfer in which a reduction and an oxidation take place simultaneously. Whereby the released oxygen is absorbed by a substance and thus oxidized. The power of AFC fuel cells ranges up to 100 kW.