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Synthesis of LiFePO4/C Composite Cathode Materials by Solid State Method Using Mixed Iron Sources

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Abstract:

The olivine LiFePO4/C composite cathode materials for lithium-ion batteries were synthesized by solid state reduction method using mixed iron sources. The effects of different temperatures on the electrochemical performance of as-synthesized cathode materials were investigated and analyzed. The crystal structures and the electrochemical performances were characterized by SEM, galvanostatical charge-discharge testing and AC-impedance, respectively. The results demonstrated that the LiFePO4/C composite cathode material synthesized at 710°C and with 1/2(FeC2O4·2H2O/Fe2O3) molar ratio of mixed iron sources has the better electrochemical performance, it has a discharge capacity of 126.1mAh/g at 0.2C and the capacity is kept at 113.8mAh/g after 20 cycles.

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Periodical:

Advanced Materials Research (Volumes 734-737)

Pages:

2541-2544

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.734-737.2541

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Online since:

August 2013

Authors:

Wei Wang, Zheng Zhang, Dao Wushuang Shi, Xing Quan Liu

Keywords:

Carbon Coating, Electrochemical Performance, LiFePO4/C Composite Cathode Material, Lithium-Ion Battery, Mixed Iron Sources

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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