Preparation and Properties of LiFePO4/C Composite Materials with Fe2O3 as Starting Reactant

Chem. J. Chinese Universities

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Preparation and Properties of LiFePO₄/C Composite Materials with Fe₂O₃ as Starting Reactant

WANG Guan, SU Gang, YAN Man-Ming, CAI Wen-Bin, JIANG Zhi-Yu

Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, China

Received:2006-02-09 Revised:1900-01-01 Online:2007-01-10 Published:2007-01-10
Contact: JIANG Zhi-Yu

Abstract

Abstract: LiFePO₄ was considered as a new kind of cathode material candidate for lithium ion batteries due to its advantages. LiFePO₄/C composites were successfully prepared from Fe₂O₃ via solid state reaction by a thermal reduction method in Ar+5%(volume fraction) H₂ atmosphere. The crystal structure and electrochemical behavior of the materials were investigated using XRD, SEM, CV and charge/discharge cycle measurements. Based on the results of TGA-DTA, LiFePO₄/C composites were synthesized at different temperatures, and it was found that the LiFePO₄/C composites synthesized at 700 ℃ with 8.76% mass fraction carbon content presented the initial discharge capacity of 144.8 mA·h/g at 0.1C, and after 160 cycles, the capacity remained as 141.4 mA·h/g. The method is available due to the low cost of Fe₂O₃ instead of using bivalent ferrous compound.

Key words: Fe₂O₃, LiFePO₄, Lithium ion battery

CLC Number:

O646

TrendMD:

WANG Guan, SU Gang, YAN Man-Ming, CAI Wen-Bin, JIANG Zhi-Yu. Preparation and Properties of LiFePO₄/C Composite Materials with Fe₂O₃ as Starting Reactant[J]. Chem. J. Chinese Universities, doi: .

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Preparation and Properties of LiFePO₄/C Composite Materials with Fe₂O₃ as Starting Reactant

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