Energy high-temperature fuel cells molten

If the materials and corrosion problems are solved high temperature fuel cells could be used in the framework of a hydrogen economy for the conversion of hydrogen into electric energy. Cells with molten salt electrolytes immobilized in a ceramic matrix could be applied at 850-950 K and with solid oxygen ion conducting electrolytes at 1200-1300 K. 

Systems studies to date indicate that fuel cell/turbine hybrids could realize a 25 percent increase in efficiency and 25 percent reduction in cost for a comparably sized fuel cell [14,15], The synergy realized by fuel cell/turbine hybrids derives primarily from using the rejected thermal energy and combustion of residual fuel from a fuel cell to drive the gas turbine. This leveraging of the thermal energy makes the high-temperature molten carbonate (MCFC) and solid oxide fuel cells (SOFC) ideal candidates for hybrid systems. Use of a recuperator contributes to thermal efficiency by transferring heat from the gas turbine exhaust to the fuel and air. 

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