điện cực tổ hợp Fe3O4/C, pin sắt/khí, vật liệu nano Fe3O4, vật liệu tổ hợp Fe3O4/C.

Abstract

Iron oxide materials are abundant on Earth and are widely used in various fields, including iron/air batteries. In this study, iron oxide (Fe₃O₄) nanomaterials are employed as electrochemically active materials, while acetylene black (AB) carbon nanomaterials serve as electrode additives to fabricate Fe₃O₄/AB composites for use as negative electrodes in iron/air batteries. S^2- based additives are incorporated into both the electrode and the electrolyte to examine their effects on the charge - discharge performance of Fe₃O₄/AB. The electrochemical properties of the Fe₃O₄/AB composite electrodes are evaluated through the cyclic voltammetry and electrochemical impedance spectroscopy. The results indicate that the S^2- additives significantly influence the electrochemical performance of the Fe₃O₄/AB composite electrode. The presence of S^2- in the Fe₃O₄/AB composite electrode enhances the rate of iron redox reactions, thereby improving the capacity and charge - discharge efficiency of the Fe₃O₄/AB electrode. The S^2- additive in the electrolyte solution plays a crucial role by improving the passivation of the iron electrode, reducing hydrogen evolution, and accelerating iron redox reactions, thereby enhancing the cycleability and capacity of the Fe₃O₄/AB electrode.