The Gibbs formation energy of MgI2 at standard conditions (298 K, 1 atm) can be calculated (data from NIST webbook)
Complete I2 reduction is accompanied by 2 e− transfer per 
. Therefore, the theoretical capacity of I2 is
. Therefore, the theoretical capacity of I2 is
The electromotive force (e.m.f.) of the Mg/I2 battery is
The theoretical energy density of I2 cathode is
The theoretical energy density of the Mg/I2 battery based on the total electrode mass is
