类球形低硫磷酸铁的制备技术研究

doi:10.11962/1006-4990.2019-0367

Abstract

Abstract:

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

CLC Number:

TQ138.11

Guo Ju,Jia Shuangzhu. Study of the method for the preparation of spherical-like and low sulfur FePO₄[J]. Inorganic Chemicals Industry, 2020, 52(5): 31-34.

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References 21

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反应时间/h	振实密度/（g·cm^-3）	反应时间/h	振实密度/（g·cm^-3）
5	0.89	30	1.20
10	1.03	50	1.22
20	1.14

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Study of the method for the preparation of spherical-like and low sulfur FePO₄

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Study of the method for the preparation of spherical-like and low sulfur FePO4