Preparation of the Lameller Nanostructure Iron Phosphate and Its Effect on the Electrochemical Performance of Lithium Iron Phosphate

被引：0

作者：

Ma Z. ^{[1
]}

Xiao R. ^{[1
]}

Liao X. ^{[1
]}

Ke X. ^{[1
]}

机构：

[1] College of Chemistry and Chemical Engineering, Guizhou University, Guiyang

来源：

Cailiao Daobao/Materials Review | 2018年 / 32卷 / 10期

关键词：

Electrochemical properties; Lameller nanostructure iron phosphate; Lithium iron phosphate;

D O I：

10.11896/j.issn.1005-023X.2018.19.006

中图分类号：

学科分类号：

摘要：

Using liquid phase reactive crystallization, NaAlO 2 was added to phosphorus source and iron source and the lamellar nanostructure of spindle shaped iron phosphate precursor was synthesized by the effect of Al(OH) 3 colloid on the crystal surface during crystallization. It was used to prepare LiFePO 4 through high temperature solid state method. The samples were characterized by means of XRD, FT-IR, SEM, TEM, analysis of BET surface area and porosity, laser particle size analyzer and electrochemical performance test. The results showed that the initial discharge capacity of the LiFePO 4 that prepared by the lameller nanostructure FePO 4 precursor at 0.1C increased by 20%, reaching 151.48 mAh/g, and the electrode charge transfer resistance was reduced by 75%, just 27.23 Ω, compared with the LiFePO 4 that prepared by non lameller nanostructure FePO 4 , and the retention rate of capacity reached 96% after 50 cycles at 0.1C rate. Meanwhile, the mechanism of Al(OH) 3 colloid affecting the formation of lamellar nanostructured iron phosphate was analyzed and discussed. © 2018, Materials Review Magazine. All right reserved.

引用

页码：3325 / 3331

页数：6

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