辽宁石油化工大学学报 ›› 2012, Vol. 32 ›› Issue (2): 5-7.

• 石油化工 • 上一篇    下一篇

共沉淀法制备LaF表面修饰LiNi1/3Co1/3Mn1/3及性能研究

杨占旭宋之林乔庆东任铁强,孙悦,李琪   

  1. 辽宁石油化工大学石油化工学院,辽宁抚顺113001
  • 收稿日期:2012-03-01 出版日期:2012-06-25 发布日期:2017-07-06
  • 作者简介:杨占旭(1982-),男,辽宁铁岭县,讲师,博士
  • 基金资助:
    辽宁省博士科研启动基金项目(20111061)。

The Synthesis and Properties of LaF3 Coated LiNi1/3Co1/3Mn1/3O2 Prepared by Coprecipitation Method

YANG Zhan-xu, SONG Zhi-lin, QIAO Qing-dong, REN Tie-qiang, SUN Yue, LI Qi   

  1. School of Petrochemical Engineering, Liaoning Shihua University, Fushun Liaoning 113001, P. R. China
  • Received:2012-03-01 Published:2012-06-25 Online:2017-07-06

摘要:  以LiNi1/3Co1/3Mn1/3为正极材料,采用共沉淀合成方法制备LaF表面修饰LiNi1/3Co1/3Mn1/3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:经过LaF3表面修饰的LiNi1/3Co1/3Mn1/3材料保持了LiNi1/3Co1/3Mn1/3层状结构,其中LaF表面修饰量为0.59%时,在电压为2.75~4.50V范围内,以0.3mA/cm2 电流密度下经恒电流充放电测试,其首次放电比容量为172.7mAh/g,经过50周充放电循环后放电比容量为163.5mAh/g,表现出较高的初始放电比容量和良好的抗过充电性能。

关键词:  锂离子电池 ,  正极材料 ,  表面修饰

Abstract: LaF3 coated LiNi1/3Co1/3Mn1/3O2 cathode material was prepared by coprecipitation method. The synthesized material was characterized by means of X-ray diffraction (XRD), scanning electron microscope (SEM) and galvanostatic charge/discharge cycling. The XRD data of the product show that they are single phases and retain the layered LiNi1/3Co1/3Mn1/3O2 structure. The synthesized the photocatalytic activity of 0.59% LaF3 coated LiNi1/3Co1/3Mn1/3O2 exhibits a good overcharge tolerance property with initial discharge specific capacity of 172.7 mAh/g and the discharge specific capacity of 163.5 mAh/g after 50 cycles in the voltage range 2.75~4.50 V at a constant current density of 0.3 mA/cm2.

Key words: Lithium-ion batteries , Cathode material , Surface modification

引用本文

杨占旭,宋之林,乔庆东,任铁强,孙 悦,李 琪. 共沉淀法制备LaF表面修饰LiNi1/3Co1/3Mn1/3及性能研究[J]. 辽宁石油化工大学学报, 2012, 32(2): 5-7.

YANG Zhan-xu, SONG Zhi-lin, QIAO Qing-dong, REN Tie-qiang, SUN Yue, LI Qi. The Synthesis and Properties of LaF3 Coated LiNi1/3Co1/3Mn1/3O2 Prepared by Coprecipitation Method[J]. Journal of Liaoning Petrochemical University, 2012, 32(2): 5-7.

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