Ceramics for Fuel Cells
There are many types of Fuel Cells, but most follow the basic principle of creating an electrochemical cell that has a continuous fuel source supplied. Unlike a battery where the fuel is inbuilt and finite, the chemical energy, hydrogen for example, and oxidising agent then create a continuous chemical reaction. The flow of positively charged hydrogen ions flow from the anode to the cathode through the electrolyte and a second direct current circuit flows from the anode to the cathode creating a circuit. A second reaction at the cathode creates water and other possible bi-products. Many types of fuel cell exist using a wide range of fuels. SOFC (Solid Oxide Fuel Cells) run at high temperature with a ceramic electrolyte – typically 800°C to 1,100°C – and can operate continually at these temperatures in a highly efficient manner once they reach temperature.
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