Precipitation Method for the Synthesis if Iron Hexacyaoferrate

A method for fabricating a battery electrode, the method comprising:

• providing a current collector;
• forming an electrode material as follows:
• forming a first solution of a ferrocyanide source [A4Fe(CN)6.PH2O] material dissolved in a first solvent,
• where “A” is selected from a group consisting of alkali metal ions;
• where p is in a range of 0 to 10;
• forming a second solution of a Fe(II) source dissolved in a second solvent;
• adding a reducing agent to a solution selected from a group consisting of the first solution, the second solution, and both the first and second solutions;
• combining the second solution with the first solution to form a third solution in a low oxygen environment;
• agitating the third solution in a low oxygen environment;
• forming a AX+1Fe2(CN)6.ZH2O electrode material,
• where X is in a range of 0 to 1;
• where z is in a range of 0 to 7;
• isolating the AX+1Fe2(CN)6.ZH2O electrode material from the third solution;
• drying the AX+1Fe2(CN)6.ZH2O electrode material under vacuum at a temperature greater than 60 degrees C;
• adding conductive carbon materials to the AX+1Fe2(CN)6.ZH2O electrode material;
• adding a binder material to form an electrode mixture;
• forming the electrode mixture overlying the current collector;
• and,
• drying the electrode mixture overlying the current collector under vacuum at a temperature of greater than 60 degrees C.