**1.2 High temperature fuel cells**

The second major group of fuel cells, the high temperature ones (650 - 1000 °C) has as its main feature the high efficiency, since the high operating temperature facilitates the reactions. One application of this type of fuel cell is stationary generation, such as primary or secondary source of energy. Two cell types in this group are molten carbonate fuel cell (MCFC) and solid oxide fuel cell (SOFC).
