Preparation of Micro-Nano-Structured FePO4•2H2O for LiFePO4 Cathode Materials by the Turbulent Flow Cycle Method

The micro-nano-structured FePO4 center dot 2H(2)O was prepared from mixed solution of FeSO4 oxidized in diluted H3PO4 with H2O2 and NaOH solution in the turbulent flow cycle state at 90 degrees C. The resulting products were characterized by thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Constant current charge/discharge tests were adopted to investigate the electrochemical performance and the rate capability (from 0.1C to SC) of the carbon-coated LiFePO4 composite materials prepared from the micro-nano-structured FePO4. The carbon-coated LiFePO4 composite materials deliver a high specific discharge capacity of 153.7 mAh.g(-1), exhibit excellent cycle performance with 98.6% of the capacity retained after 30 cycles. This study demonstrates that the turbulent flow cycle method may be an economical and effective method for industrial L. production of fine and uniform micro-nano-structured FePO4 center dot 2H(2)O particles for LiFePO4 cathode materials for Li-ion batteries.

Automated summary

The study shows that the micro-nano-structured FePO4·2H2O prepared by the turbulent flow cycle method is suitable for use as a cathode material for LiFePO4 in lithium-ion batteries, exhibiting high specific discharge capacity and excellent cycle performance.