AFCbränsleceller

AFCbränsleceller, which stands for Alkaline Fuel Cells, are a type of electrochemical device that converts chemical energy into electrical energy. Unlike some other fuel cell technologies, AFCs typically use an alkaline electrolyte, most commonly potassium hydroxide (KOH). The reactants are typically hydrogen as the fuel and oxygen, often from air, as the oxidant. The reaction at the anode is the oxidation of hydrogen to water, releasing electrons and hydroxide ions. At the cathode, oxygen reacts with water and electrons to form hydroxide ions. The electrolyte facilitates the movement of these ions between the electrodes. A key characteristic of AFCs is their high efficiency and relatively low operating temperature. However, they are susceptible to poisoning by carbon dioxide (CO2), which can react with the alkaline electrolyte to form carbonates, thereby reducing performance. This sensitivity to CO2 means that pure oxygen is often preferred as the oxidant, or efficient CO2 scrubbing systems are required when using air. AFC technology has been explored for various applications, including stationary power generation and potentially for transportation, although the CO2 sensitivity has presented challenges for widespread adoption in some of these areas. Despite these challenges, ongoing research aims to improve their durability and tolerance to contaminants.