An electric cell comprising a positive electrode, a negative electrode
containing aluminum or aluminum alloy, and an electrolyte arranged
between the positive electrode and the negative electrode, wherein the
electrolyte includes: at least one ion selected from a group of a sulfate
ion (SO.sub.4.sup.2-) and a nitrate ion (NO.sub.3.sup.-), the
concentration of the ion being in the range of 0.2 to 16 M/L; and an
additive selected from a group of an organic acid, a salt of the organic
acid, a hydrate of the organic acid, an ester of the organic acid, an ion
of the organic acid, and derivatives thereof.