In addition to commercially available batteries, such as lead acid and lithium-ion batteries, the metal-air battery is a potential candidate for grid-scale electric energy storage .
In general, three air electrode configurations have been used for the metal-air battery : (a) a two-electrode configuration, one each for the OER and ORR; (b) a single electrode with a catalyst layer, which is a bifunctional catalyst participating in both the OER and ORR; and (c) a single electrode with two catalyst layers, one each for the OER and ORR.
That makes the rechargeable metal-air battery
lighter with the potential to pack in more energy than its commercial counterpart.
Fluidic Energy, a tech startup in Arizona, claims it can develop a metal-air battery
that will hold 11 times the charge of the best lithium-ion batteries for less than a third of the co st.
"A lithium-air secondary battery, potentially the most-promising metal-air battery
known, has an energy storage potential that is 10 times greater than a state-of-the-art lithium-ion battery.