Patent ID: 8323816

Claim:
A battery configured to exchange energy with an external device, the battery comprising: a first positive electrode of an electronically conductive molten alloy, having a first density, comprising an alkaline earth metal and at least one miscible element; a first negative electrode of an electronically conductive liquid, having a second density, comprising the alkaline earth metal; a first liquid electrolyte, having a third density, comprising cations of the alkaline earth metal, in contact with the first negative and positive electrodes; a first positive current collector, in electrical contact with the first positive electrode, configured to connect to the external device; and a first negative current collector, in electrical contact with the first negative electrode, configured to connect to the external device, wherein the alkaline earth metal is present at respective disparate chemical potentials in the first positive and negative electrodes, originating a voltage between the first positive and negative electrodes.