title: Super-iron battery
text: # Super-iron battery
  
  The Super-iron battery is a moniker for a proposed class of rechargeable electric battery. Such batteries feature cathodes composed of ferrate salts, either potassium ferrate (K $_2FeO$ $_4)$ or barium ferrate (BaFeO $_4).$ One attraction to the proposed device is that the spent cathode would consist of a rust-like material, which is preferable to batteries based on cadmium, manganese and nickel.
  
  