1.) Thermodynamics Principle
-A link to the thermal expansion coefficient and what it means, and how it can be used. My guess is that the thermal expansion coefficient stated in the report means the volume expansion, since the entire system will be under the same conditions for a prolonged time, making each part expand the same.
2.) Best Efficiency
-no need for fuel processing, since they don’t need to worry about fuel contamination from other substances, and be made into usable substances straight in the cell (called internal reformation)
-must be at high temperatures to operate, between 750-1000 celcius
-Possible 80% efficiency
3.) Engineering Details
-must be chemically and physically stable in an oxidizing/reducing environment, chemically compatible with other parts, proper electrical conductivity, similar thermal expansion coefficients to the other parts (to avoid cracking and other damage), low cost, be strong, and easy to make.
-all SOFC use yttria-stalized zirconia as the electrolyte, lanthanum manganite (impurified with strontium) cathode, a nickel/yttria-stabilised zirconia cermet (ceramic and metal alloy) anode, and a lanthanum chromite (LaCrO3) interconnect.
-the interconnect is made to hold each cell together in series and conduct the electricity through it toward the thing(s) to be powered. The interconnect has to have a conductivity similar to that of the other parts of the cell, likewise do all the parts of the cell have to have a similar conductivity to that of the interconnect. So the fact that the cathode has to be impurified means that it’s pure conductivity is higher than that of the rest of the system, and needs to be brought down, or that it’s to low and needs to be brought up.
4.) Environment Impacts
-can take CO straight from source to use as fuel in the cell, cutting down on carbon emissions and recycling the carbon that’s already been made.