磁铁矿砂Fe3O4制备磷酸铁锂碳复合材料(LFP/C)及表征

Zuffa Anisa, M. Zainuri
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引用次数: 0

摘要

采用固相反应法制备了磷酸铁锂碳复合材料。采用磁铁矿砂Fe3O4作为LFP/C合成的铁源。样品的煅烧温度分别为400、500和600°C。通过x射线衍射(XRD)图的Rietveld分析确定了样品的物相和组成。在400℃时,鉴定出的主要相为二磷酸LiFeP2O7,其余相为硅质Li3Fe2(PO4)3和赤铁矿Fe2O3。随着温度的升高,二磷酸相LiFeP2O7转变为无机相Li3Fe2(PO4)3。在1400 ~ 400 cm-1范围内用FTIR光谱研究了样品的化学键、晶格振动等结构特征。LFP-1至LFP-3各键的特定振动模式由一定波数的高强度表现出来。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Synthesis and Characterization of Lithium Iron Phosphate Carbon Composite (LFP/C) using Magnetite Sand Fe3O4
Lithium Ferro Phosphate Carbon Composite (LFP/C) had been synthesized using solid-state reaction method. Magnetite sand Fe3O4 was used as Fe- source in LFP/C synthesized. Calcination temperature of the sample performed at 400, 500, and 600°C. The phase and composition of samples determined by Rietveld analysis of X-ray diffraction (XRD) pattern. The dominant identified phase at 400°C was diphosphate LiFeP2O7, and the others phases were nasicon Li3Fe2(PO4)3 and hematite Fe2O3. As the temperature getting higher the diphosphate phase LiFeP2O7 transform to nasicon Li3Fe2(PO4)3.The chemical bonds, lattice vibration and other structural features of the sample were investigated using FTIR spectroscopy in range of 1400 – 400 cm-1. Specific vibration modes in LFP-1 to LFP-3 for each bonding were shown by the high intense in certain wavenumber.
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