Zinc-Bromine Alkali-Salt Membrane Chemical Power Cell

Abstract

Zinc-bromine alkali-salt membrane-type chemical power cell was assembled and studied. The open-circuit voltage (OCV) of the zinc-bromine alkali-salt membrane chemical power cell (CPC) was experimentally obtained (2.30 V). This value is close to the theoretically calculated value of the electromotive force (EMF) of the cell (2.27 V) and exceeds the EMF and OCV of many known power cells using a single homogeneous-composition aqueous electrolyte and having no ion-exchange membrane. The maximum theoretical specific energy of the zinc-bromine alkali-salt membrane CPC is 317.3 W h kg^–1, which is lower that the corresponding values for the zinc-silver and zinc-nickel power cells and exceeds that of nickel-iron, nickel-cadmium, and lead sulfuric acid CPCs. It is shown that the cell under study can be used as an electric battery.