Theoretical and experimental study of reversible intercalation of Li ions in the Jarosite NaFe3(SO4)2(OH)6 structure

Doped Potassium Jarosite: Synthesis, Characterization and Evaluation as Biomaterial for Its Application in Bone Tissue Engineering

“…In Figure 11a, the crystalline structure of potassium jarosite (without doping) is shown, where there can be seen trigonal unit cells forming close-packed hexagonal structures. On the other hand, Figure 11b is a Ca doped potassium jarosite, where it is suggested that the migration of alkaline ions in the structures of JKCa is possible at high temperatures or is accompanied by a structural reorganization [18]. The above is consistent with the occurrence of the crystalline-amorphous transformation when an alkaline ion is inserted into the structure.…”

“…However, some investigations have mentioned the use of this type of compound as anodes and/or cathodes in lithium-ion batteries, through the synthesis of a two-dimensional material composed by KFe 3 (SO 4 ) 2 (OH) 6 /rGO using graphene oxide sheets through an oxidation process in the solution phase at an elevated temperature [7,17]. Recent studies have proven that there may be an electrochemical ion exchange in jarosite, with structurally stable mixed phases existing [18]. Therefore, by doping this kind of material with some elements such as calcium sulfate [19], it could be a promising strategy to overcome the shortage of grafts suitable for bone healing in tissue regeneration, due to its properties and good compatibility [20].…”

Faster Diffusion and Higher Lithium-Ion Intercalation Capacity in Pb-Jarosite than Na-Jarosite

“…The changes in overpotential may be related to different intercalation or diffusion mechanisms that vary with concentration and potential. It has been shown that Na-jarosite undergoes a semireversible crystalline-to-amorphous phase transformation upon lithium intercalation. , …”

“…Recycling of an environmentally hazardous waste material is an appealing aspect of jarosite and could provide it the economic advantage to make it competitive in the battery market that warrants its further investigation despite its lower energy density. Lithium and sodium intercalation into the jarosite structure was first reported by the Raveau group in 2014. , Since then, there have been several other publications on nanostructured jarosite cathodes and anodes, ammonium-jarosite, the vanadium-jarosite analogue, and fluoride-doped jarosite. − One challenge is that bulk jarosite exhibits low capacity, especially at high current rates due to slow kinetics. Currently, synthesized jarosite nanosheets and nanoparticles with short diffusion pathways provide the best capacity over many cycles and at high currents. , However, more investigation must be done on the bulk electrochemical properties of other jarosite compounds that could potentially be sourced from leach mining waste.…”

An overview of hydroxy-based polyanionic cathode insertion materials for metal-ion batteries

“…the same reaction mechanism with reversible capacity of 120 mAh/g at a rate of C/20 with Fe 3+ /Fe 2+ redox couple centered ~2.72 V (vs. Na/Na + ) 106. Plugging the gap of a rigorous mechanistic study of Li + intercalation in Natrojarosite NaFe 3 (SO 4 ) 2 (OH) 6 , Kosova et al published their analysis based on synergized theoretical and experimental studies 107. Natrojarosite was synthesized using hydrothermal synthesis route by dissolving Fe 2 (SO 4 ) 3 .9H 2 O and NaHSO 4 .H 2 O reagents in 0.01 M H 2 SO 4 under agitation.…”