Effects of additives and surface treatment on electrochemical performance for bafeo4 electrode

BaFeO₄ was prepared by using the raw material K₂FeO₄. The structure of the product was characterized by X-ray diffraction and infrared radiation. Particle size and morphology were analyzed by SEM. BaFeO₄, the mixture of BaFeO₄, and additives were used as cathode, zinc used as anode, with which discharge performance test was carried out in the KOH electrolyte with a concentration of 14 mol/L. The results show that the discharge performance of BaFeO₄ is obviously enhanced, the discharge platform is increased by 0.3 V, and the capacity reached up to 240 mAh/g, increased by 40 mAh/g after 5% of K₂S₂O₈ was added. In addition, the discharge capacity is increased by 65 mAh/g via treating the electrode surface with TiO₂ sol, reached up to 265 mAh/g, and electrochemical performance is obviously improved. The reason of improving property is discussed in the work too.