Studies On High-energy Super-iron Battery And Its Electrochemical Properties

Iron, an abundant element in nature, typically occurs in the valence states of Fe(0), Fe(II) and Fe(III). Due to their high oxidation, multiple electron transfer, and high intrinsic energy, we refer to the cells containing Fe(VI) compounds as " super-iron" batteries with more energy capacity compared to conventional alkaline batteries. The three charge reduction of Fe (VI) represents a high energy and capacity source of cathodes, and the products(ferric oxide) have been considered as an environmentally benign substance.This paper provides a review of advanced technology, application and updating progress of alkaline, lithium and super-iron batteries. Based on the electrochemistry, performance and growing history, high-energy super-iron batteries are systematically studied in this thesis.In the experiments, we aim at the study of preparations, analysis, characterization and electrochemistry of green super-iron batteries. The paper developed a novel method of preparation of potassium ferrate by hypochlorite oxidation, and determined the optimal parameters. The experimental results demonstrate that Fe(VI) compounds with high purity and yield can be prepared by raw technical materials. A variety of Fe(VI) cathode materials, synthesized by potassium ferrate and alkaline-earth metal salts, provide a high-energy electrochemical discharge.The characterization of Fe(VI) compounds was presented by chemical analysis (chromite), FTIR, UV, XRD. The results show high purity and perfect crystallation of as-synthsized Fe(VI) compounds.Effects of factors, cell compositions, electrolyte, active agent, modifer and conductor, on the cell electrochemical properties were investigated. The optimal parameters of electrochemical peformance of Fe(VI) compounds were exhibited by more 1.5-time energy and capacity of super-iron batteries compared to a standard one.