Lithium Air vs Li Fluoride battery capacity [closed]








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Lithium air aka lithium oxygen batteries are described as highest theoretical capacity battery possible. In wikipedia, it says lithium air has energy density 5210 Watt hour per kg, including weight of the oxygen.


What if we used fluorine instead of oxygen? Obviously, voltage would go up since fluorine is more electronegative than oxygen but when it comes to energy to weight ratio, I am not so sure if it will be better.


Fluorine is element number number 9 and oxygen 8, that means its heavier by one proton and one neutron, furthermore it can take only one electron as opposed to the oxygen which can accept two so you need twice as many atoms to make the reaction.


With all that said, which one is the true ultimate theoretical combination. What is the theoretical energy density of lithium fluorine battery in watt hours per kg?


