The Synthesis and Properties of LiFePO4/C Prepared by Solid-State Method at High Temperatur

doi:10.3696/j.issn.1006-396X.2011.05.010

Journal of Petrochemical Universities ›› 2011, Vol. 24 ›› Issue (5): 38-40.DOI: 10.3696/j.issn.1006-396X.2011.05.010

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The Synthesis and Properties of LiFePO₄/C Prepared by Solid-State Method at High Temperatur

1.School of Petrochemical Engineering, Liaoning Shihua University, Fushun Liaoning 113001, P. R. China;

2.Catalysts Factory of Fushun Petrochemical Company of PetroChina, Fushun Liaoning 113001, P. R. China

Received:2011-10-08 Revised:2011-10-15 Published:2011-10-25 Online:2011-10-25

高温固相法制备LiFePO₄/C 正极材料及其性能研究

杨占旭¹,乔庆东¹,康晓雪¹,姜海波²

1.辽宁石油化工大学石油化工学院,辽宁抚顺113001;
2.中国石油抚顺石化公司催化剂厂,辽宁抚顺113001

作者简介:杨占旭（1982-），男，辽宁铁岭县，讲师，博士。
基金资助:
辽宁省自然科学基金项目（20082187）。

Abstract

Abstract: LiFePO₄/C cathode material was prepared from solid-state method using Fe₂O₃,LiH₂PO₄,black carbon and sugar as the starting materials.The synthesized material was characterized by means of X-ray diffraction (XRD),scanning electron microscope (SEM) and galvanostatic charge/discharge cycling.The results show that the products are single phases and all the peaks are indexable to the orthorhombic structure.The synthesized LiFePO₄/C exhibits an excellent electrochemical property with initial discharge specific capacity of 156.3 mAh/g and the discharge specific capacity of 157.7 mAh/g after 30 cycles in the voltage range 2.50~4.20V (versusLi+/Li) at a constant current density of 0.1 mA/cm².

Key words: Lithium-ion batteries, , Cathode material, , Solid-state method

摘要： 以Fe₂O₃,LiH₂PO₄,乙炔黑和蔗糖为原料,采用高温固相合成方法制备LiFePO₄/C复合正极材料。利用X射线衍射(XRD)、扫描电镜(SEM)和电化学测试等方法对合成材料的结构、形貌以及电化学性能进行表征。结果表明,合成材料为单一晶相正交晶系结构,在电压为2.50~4.20V (vs.Li+/Li),以0.1mA/cm² 电流密度下经恒电流充放电测试,其首次放电比容量为156.3mAh/g,经过30周充放电循环后放电比容量为157.7mAh/g,表现出较大的初始放电比容量和优异的循环性能。

关键词: 锂离子电池, , 正极材料, , 高温固相法

YANG Zhan-xu,QIAO Qing-,KANG Xiao-xue,et al. The Synthesis and Properties of LiFePO₄/C Prepared by Solid-State Method at High Temperatur[J]. Journal of Petrochemical Universities, 2011, 24(5): 38-40.

杨占旭,乔庆东,康晓雪,姜海波. 高温固相法制备LiFePO₄/C 正极材料及其性能研究[J]. 石油化工高等学校学报, 2011, 24(5): 38-40.

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The Synthesis and Properties of LiFePO₄/C Prepared by Solid-State Method at High Temperatur

高温固相法制备LiFePO₄/C 正极材料及其性能研究

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