Rapid chemical synthesis of the barium ferrate super-iron Fe (VI) compound, BaFeO 4

Abstract

An alternate rapid synthesis of BaFeO 4 is demonstrated. Fe(VI) salts, including BaFeO 4, are energetic cathode materials in super-iron batteries ranging from primary to secondary, and including aqueous and non-aqueous cells. Of the Fe(VI) salts, BaFeO 4 sustains unusually facile charge transfer, of importance to the high power domain of alkaline batteries. Unlike previous syntheses, BaFeO 4 preparation is demonstrated from all solid state room temperature reactants. This eliminates several synthetic procedural steps and improves stability to approach that of the rigorously stable chemically synthesized K 2FeO 4 salt.