Modification And Performance Of Potassium Ferrate As Cathode Of Super-iron Battery

In this paper, the development of super-iron battery and electrochemistry performances of ferrate was summarized. Based on the research on super-iron battery in the world, the synthesis and analysis of ferrate and the influence of cathode material modulation on electrochemistry performances of super-iron battery were studied.In the experiments, K₂FeO₄ was synthesized by an improved hypochlorite oxidation,and BaFeO4 was synthesized in solid phase. Chromite method was used to determine the purity of K₂FeO₄. The structure of K₂FeO₄ and BaFeO4 were examined by XRD and FTIR.The experimental results indicate that more than 96% purity and 95% purity of BaFeO4 were gained.The single oblong crystal was formed while it was developed in a standing state.Influence of additive species and different dosage of additive on discharge performance of super-iron battery were studied, and production of discharge was examined by XRD.The results show that the efficiency of discharge was improved from 37% to 78% ( 71Ωload ) with adding 5wt%Si-Al-oxide and 4.5wt% MnO₂.Furthermore, BaFeO4 was modulated by adding different additives so that we can find a additive which was able to enhance the stability of BaFeO4 and discharge capacity of the battery. Findings showed that the purity of BaFeO4 combined with Si-Al-oxide 2 declined from 91.19% to 89.12%,only 2 %.In the test of discharge, the influence of Si-Al-oxide 2 on the stability of BaFeO4 and discharge performance were studied. Findings showed that discharge efficiency of super-iron battery taking BaFeO₄ which combined with Si-Al-oxide 2 as cathode material was improved from 86.9% to 90.1%, Si-Al-oxide 2 can enhance the stability of BaFeO₄ and discharge performance.