Inorganic Chemicals Industry >
Study of the method for the preparation of spherical-like and low sulfur FePO4
Received date: 2019-11-11
Online published: 2020-05-21
FePO4 is the core precursor of LiFePO4.The morphology and sulfur content of FePO4 products have important ef-fects on the properties of the synthesized LiFePO4 materials.To obtain spherical-like and low-sulfur FePO4 products,the tradi-tional liquid phase precipitation method was improved and optimized.Adding CTAB as a morphology additive to improve the sphericity of the products,and adding ammonia water as a ligand to form the ammonium ferric phosphate complex in order to improve the crystallization process and reduce the sulfur content of the product.The results showed that the prepared FePO4 products have low sulfur content of up to 2.6×10 -5 and were homogeneous micro-spherical-like particles with D50=11.4 μm and tap density of 1.22 g/cm 3 that are expected to be the core precursors for the preparation of high compacted deasity LiFePO4 materials.
Key words： cathode material; low sulfur; iron phosphate; LiFePO4
Ju Guo , Shuangzhu Jia . Study of the method for the preparation of spherical-like and low sulfur FePO4[J]. Inorganic Chemicals Industry, 2020 , 52(5) : 31 -34 . DOI: 10.11962/1006-4990.2019-0367
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