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A membrane-free interfacial battery with high energy density.

A new concept of the membrane-free interfacial battery based on a biphasic system was proposed for the first time. An aqueous ZnBr2 solution was used as a negative electrolyte, while Br2 in CCl4 served as a positive electrolyte. This interfacial Zn/Br2 battery demonstrated a very impressive performance with a CE of 96% and an EE of 81% at a current density of 15 mA cm-2.