[sorincosofret (OP)]

You should prove that a melting salt has a potential lower then the theoretical potential. After that you should convince the actual scientific community that your discovery worth to be published. Be sure that this research will be very useful for you. The industry works at potentials of 5 to 9 V in case of molten salt electrolysis. So if you are convinced about what you are saying, make the thing!
After that you should modify a lot of books about subject. When you will be finished with this job, you can make comments.

[Bored chemist]

"You should prove that a melting salt has a potential lower then the theoretical potential."
What is the theoretical potential?
My comment on the matter of that potential was "God knows"; or were you not paying attention?

The calculated voltage is the minimum required at equilibrium. Its the voltge required to stop the reaction running backwards.
If you want the reaction to go forwards at a reasonble rate you need to use a higher voltage. This also generates enough heat to keep the salt molten. That's why industry uses 5 to 9 V
It's not that I need to rewrite the books; you need to read them.