Perhaps the most promising metal-air battery technology. Typically it has a zinc anode, an oxygen permeable cathode, a separator, and a caustic alkaline electrolyte. Promising low cost, high stability and high energy density.
The overall reaction is:
2Zn + O2 <=> 2ZnO
Advantages:
- High energy density
Disadvantages:
- Short cycle life
- Low power density
- Low efficiency
See also: Iron Air Battery, Nickel Zinc Battery, Aluminium Air Battery