ABSTRACT. Energy becomes a significant issue for all communities in the world with the depletion of fossil fuel reserves. Fuel cell technology is an alternative that is in demand because of its high efficiency and environmental friendliness. Solid oxide fuel cell (SOFC) is a fuel cell technology that uses solid ceramic as electrolytes. Compared to similar technologies, SOFC offers better flexibility in terms of fuel use. Problems arise when the operation of the SOFC requires a sufficiently high operating temperature (range 500°C-1000°C). In addition, most of the materials that make up SOFCs are rare earth materials with high economic value. This report will discuss the development of fuel cell technology, especially in terms of the materials used to compose electrodes and electrolytes in SOFCs. Several innovations and research on new materials have been carried out to lower the operating temperature, get higher efficiency, and, of course, more competitive prices. Thus, fuel cell technology is expected to be widely applied in the next few years and not just on a research scale.

Keywords : solid oxide fuel cell, materials, low temperature operation, high efficiency