1. These factors recommend ceria as a solid electrolyte in solid-oxide fuel cells. 2. Mixed-oxide fuel is made by reprocessing spent uranium fuel rods from nuclear plants. 3. Solid-oxide fuel cells produce heat from the recombination of the oxygen and hydrogen. 4. Rolls-Royce is developing solid-oxide fuel cells produced by screen printing onto inexpensive ceramic materials. 5. Mixed oxide fuel ( MOX ) is one of these. 6. This means that they are strongly opposed to the use of mixed oxide fuel . 7. In July, another Japanese utility returned a shipment of defective mixed-oxide fuel from Britain. 8. Gadolinium can also serve as an electrolyte in solid oxide fuel cells ( SOFCs ). 9. The uranium-oxide fuel pellets would start to melt, releasing radioactivity into the graphite reactor core. 10. Solid oxide fuel cells often use complex oxide materials as their electrolytes, anodes, and cathodes.