Inorganic Chemicals Industry >
Synthesis and characterization of 3D nano/micro spherical iron phosphate in ethanol-water system
Received date: 2020-01-16
Online published: 2020-06-12
A simple method for preparing high tap density spherical iron phosphate under mild conditions was proposed.Iron phosphate with 3D nano/micro spherical structure（FPE） was prepared by using ferric nitrate[Fe（NO3）·9H2O] and phospho-ric acid（H3PO4） as raw materials in a mixed solution of ethanol and water without introducing alkaline substances for pH ad-justing and other templating agents.The obtained products were characterized by SEM,laser particle size analyzer,XRD,TG-DSC and BET.The results indicated that the iron phosphate prepared by this method had a 3D nano/micro spherical struc-ture,an average primary particle diameter of 27 nm and a secondary particle diameter D50 of 3.75 μm.The composition of FPE was iron phosphate dihydrate FePO4·2H2O with high purity.The FPE had a mesoporous structure with average pore diameter of 2.75 nm,specific surface area of 22.41 cm 2/g and high tap density of 1.34 g/cm 3,3D nano/micro spherical iron phosphate is simple to prepare and has excellent performance.The lithium iron phosphate LiFePO4/C prepared by using the precursor FPE has a high tap density of 1.46 g/cm 3,and the discharge capacity is 157.9 mA·h/g at 0.2C.
Kang Wu , Jun Li , Ming Chen . Synthesis and characterization of 3D nano/micro spherical iron phosphate in ethanol-water system[J]. Inorganic Chemicals Industry, 2020 , 52(6) : 41 -45 . DOI: 10.11962/1006-4990.2019-0409
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