Abstract: A hybrid system for producing electricity by a metal-air cell and for utilizing hydrogen released during the operation of the metal-air cell for producing energy in the form of electricity, mechanical power or heat energy. The hybrid electric energy system includes at least one metal-air cell and at least one hydrogen conversion unit.

Abstract: This invention is directed to electrolysis-based devices and methods for recycling of electrolyte solutions. Specifically, the invention is related to regeneration of spent electrolyte solutions comprising metal ions such as electrolyte solutions used in metal/air batteries.

Abstract: This invention is directed to a metal-air electrochemical power sources, specifically zinc-air batteries and fuel cells, and methods for removing solid or semi-solid spent fuel using a thickener-liquefier pair.

Abstract: This invention provides a shutdown system and methods for battery shutdown followed by a standby mode using a washing solution controlled by pH such that the electrode remains stable.

Abstract: This invention relates to the regeneration of spent alkaline solutions, for example, alkaline electrolyte solutions used in metal/air batteries, specifically in aluminum/air batteries. The invention provides methods and systems to regenerate alkaline electrolyte solutions by adding water and optionally other solvents to spent electrolyte solutions, thus precipitating metal hydroxides from the spent electrolyte solution.

Abstract: The Invention provides a zinc-air cell comprising at least one zinc-incorporating structure, at least one oxygen evolving structure and at least one air electrode; wherein said zinc-air cell comprises a first pair of electrodes for the charging of said air cell, said electrode pair comprising said at least one zinc-incorporating structure and said at least one oxygen evolving structure; and wherein said zinc-air cell comprises a second pair of electrodes for the discharging of said air cell, said electrode pair comprising said at least one zinc-incorporating structure and said at least one air electrode.

Abstract: Flow directing element in a metal air cell is configured to cause evenly distributed flow of aqueous electrolyte solution electrolyte in it over the anode. Flow distributing element in a metal air cell is configured to lengthen the path of electrolyte flow from an inlet to the anode, thereby to increase ohmic resistance to shunt currents in the cell. A battery with these cells consumes the metal in the metal anodes evenly and with minimized shunt currents.

Abstract: A zinc-air cell, a battery which is a low weight, low volume, or high energy system, or a combination thereof, and an apparatus for recharging the same are disclosed.

Abstract: This invention is directed to electrolyte systems for metal-air electrochemical power sources, particularly Al-Air batteries and fuel cells with alkaline electrolyte, methods of increasing the ionic conductivity of such electrolytes, methods of increasing the electrolyte utilization coefficient and to methods of use thereof.