What is a Phosphoric Acid Fuel Cells (PAFCs)?

Phosphoric Acid Fuel Cells (PAFCs) are a type of fuel cell that uses phosphoric acid (H₃PO₄) as the electrolyte. They are among the most commercially developed fuel cell technologies. PAFCs typically operate at temperatures of around 150 to 200°C, allowing for stable and continuous power generation. These fuel cells use hydrogen as fuel and oxygen (from air) as the oxidant. The electrochemical reaction between them produces electricity, heat, and water. PAFCs are particularly suitable for stationary power generation, and are widely used in hospitals, hotels, and commercial buildings, where long-term, reliable power is essential.

Advantages of PAFCs include high durability, low noise operation, and the ability to utilize waste heat for combined heat and power (CHP) systems. However, they require platinum as a catalyst, which increases the cost, and they have longer start-up times compared to other fuel cell types. Despite these limitations, PAFCs are seen as clean, efficient, and environmentally friendly power sources with strong potential for decentralized energy systems.

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