FIG. 1 is a perspective view of a coated iron anode;

FIG. 2 is a side view and cross-section view of an iron electrode coated on both sides of the substrate;

FIG. 3 is a schematic of a battery in accordance with one embodiment of the present invention.

For the purpose of the present invention and description, the following definitions will apply.

• • Capacity of a battery is measured in ampere-hours (Ah).
  • Specific energy defines the battery capacity in weight, Watt hours/kg (WH/kg). A battery can have a high specific energy but poor specific power (load capacity), as is the case in alkaline batteries. A battery may have a low specific energy but can deliver high specific power, as is possible, e.g., with a supercapacitor. Specific energy is often thought to be synonymous with battery capacity and runtime.
  • Energy density, or volumetric energy density, is given in size, Watt hours/liter (WH/L).
  • Specific power defines the battery capacity, or the amount of current the battery can provide. Specific power is given in Watts/kg (W/kg). Batteries for power tools, for example, often exhibit high specific power but low capacity. Specific power indicates internal resistance and the delivery of power.