Synthesis Of Iron Phosphate Research Articles

A novel value-added utilization process for pyrite cinder: Selective recovery of Cu/Co and synthesis of iron phosphate

Pyrite cinder is a typical hazardous waste produced in sulfuric acid industry, which, however, contains a significant level of valuable metals, such as iron, copper, cobalt, etc. About 12 million tons of pyrite cinder are generated in China annually, while the utilization rate is less than 50% due to the complex relationship of various components. In this study, a process of phosphoric acid leaching was used to selectively separate and recover Cu, Co and Fe from the pyrite cinder. The effects of different leaching parameters on the recovery rate of valuable metals in phosphoric acid leaching systems were investigated. Under the optimal conditions, the results indicated that the leaching efficiency of copper and cobalt was above 82% and 99%, respectively. More than 98% of iron was transferred into insoluble FePO4·2H2O, which could be used as precursor of battery-grade electrode material after a hydrofluoric acid purification process. Cu and Co in the leaching solutions were extracted efficiently by P204.

Synthesis of Promising Cathode Material for Lithium Polymer Batteries

Original method for synthesis of lithium vanadium phosphate was developed. The method includes two stages: 1st, synthesis of iron phosphate from a mixture of ammonium dihydrophosphate and metal oxide; and 2st, synthesis of lithium vanadium phosphate by thermal lithiation of the product obtained in the 1st stage, with mechanical activation of the precursor in the course of plastic deformation. Our results would provide some basis for further improvement on the Li3V2(PO4)3 electrode materials for advance lithium-ion batteries.

Synthesis of Iron Phosphate and Their Composites for Lithium/Sodium Ion Batteries

AbstractHigh‐performance electric energy storage material has recently developed due to the attention for sustainable development. As ecofriendly energy storage device, lithium ion batteries and sodium ion batteries deserve more concern today. FePO4 and NaFePO4 share similar advantages such as easy preparation, abundant, and inexpensive, so they can be ideal materials for lithium/sodium ion batteries. This review is focused on recent progresses in nanostructured FePO4/NaFePO4‐based nanomaterial as cathode materials for lithium/sodium ion batteries. FePO4‐based materials contain crystalline and amorphous pure FePO4 nanomaterial, FePO4/C compounds, and other novel materials with unique morphologies. NaFePO4‐based materials contain olivine NaFePO4, Na4FeP2O7, and so on. They own unique properties, including preferable energy density, cycling performance, electrical conductivity, and charge/discharge stability. This review is designed to summarize the synthesis, morphology, and electrochemical property and application of FePO4‐based and NaFePO4‐based nanomaterials. There exist relations among the structure, property, and storage, which is also introduced. Furthermore, this review assesses the challenges and outlooks of FePO4/NaFePO4‐based nanomaterial for future development; it also sheds light on appropriate development direction of advanced rechargeable batteries with a focus on FePO4/NaFePO4‐based nanomaterial.

Synthesis and electrochemical properties of lithium iron phosphate

Original method for synthesis of lithium iron phosphate was developed. The method includes two stages: 1st, synthesis of iron phosphate from a mixture of ammonium dihydrophosphate and metal oxide; and 2nd, synthesis of lithium iron phosphate by thermal lithiation of the product obtained in the 1st stage, with mechanical activation of the precursor in the course of plastic deformation.