Metal-Air Batteries

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Our Material Withstands Harsh Alkaline Conditions

Ionomr has one of few materials that can withstand the harsh alkaline conditions in metal-air batteries. Combined with its class-leading oxidative resistance and anion selectivity for OH ions over metal complexes, Aemion™ unlocks highly competitive metal-air designs. Processable as a thin film, it can be coated directly onto the air side cathode with low resistance and minimal material usage.

Rechargeable alkali metal-air batteries have enormous potential in mobile applications due to their high energy density. Several metal–air battery variations have been proposed, including lithium-air, zinc–air and aluminum–air batteries with theoretical energy density about 2–10 fold higher than that of lithium-ion batteries. However, metal-air batteries have yet to fulfill their full potential due to unresolved complications associated with the air cathode and electrolyte, which are directly addressed by Aemion™ polymers and membranes.

Metal-air batteries employ a solid metal anode, an air-breathing cathode, and an electrolyte or electrolyte-saturated separator layer between the two electrodes. The cell discharges electrical energy by generating electrons from the oxidation of the metal anode. These electrons pass through the current collector and perform electrical work.

Although many manufacturers offer refuel units, where the consumed metal is mechanically replaced, few developers offer an electrically rechargeable battery. Rechargeable metal-air batteries that are under development have a life of only a few hundred cycles and low efficiencies. However, technological advances such as the integration of anion-exchange membranes are addressing these deficiencies, to bring metal-air batteries to the forefront.