Patent ID: 8771855
Filing Date: 2014-07-08
Classification: H01M,Y02E

Abstract:
1. A battery comprising: an anode comprising an alkali metal or an alkali metal alloy; a hydrogen gas producing cathode; an alkali metal conductive membrane that separates the anode from the cathode, wherein the alkali metal conductive membrane is impermeable to water; an aqueous catholyte comprising cations of the alkali metal, wherein the catholyte is in fluid communication with the cathode; a hydrogen-egress zone, wherein hydrogen produced at the cathode may vent out of the catholyte and out of the battery via the hydrogen-egress zone; and a water-ingress zone, wherein water from an environment outside the battery may ingress into the catholyte via the water-ingress zone, wherein the water-ingress zone restricts the ingress of cations dissolved in the water into the catholyte.