Journal of Petrochemical Universities

Journal of Petrochemical Universities ›› 2011, Vol. 24 ›› Issue (1): 18-20.DOI: 10.3696/j.issn.1006-396X.2011.01.004

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The Synthesis and Properties of LiNi0.8Co0.2O2 Cathode Material for Lithium-Ion Batteries

  

  1. School of Petrochemical Engineering, Liaoning Shihua University, Fushun Liaoning 113001, P. R. China
  • Received:2010-07-05 Revised:2010-10-11 Published:2011-02-25 Online:2011-02-25

锂离子电池正极材料LiNi0.8Co0.2O2的合成及性能研究

杨占旭,乔庆东   

  1. 辽宁石油化工大学石油化工学院,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: LiNi0.8Co0.2O2 cathode material for lithium-ion batteries was prepared from sol-gel method using nitrates and starch 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 XRD data of the product show that the synthesized material are single phases and all the peaks are indexable to the layered α-NaFeO2 structure. The synthesized LiNi0.8Co0.2O2 presents a narrow distribution of small particles and exhibits a good electrochemical property with initial discharge specific capacity of 183.1 mAh/g and the discharge specific capacity of 171.3 mAh/g after 50 cycles in the voltage range 2.75~4.50 V (versus Li+/Li) at a constant current density of 0.2 mA/cm2.

Key words:

摘要: 以硝酸盐和淀粉为原料,采用溶胶-凝胶方法合成LiNi0.8Co0.2O2锂离子电池正极材料,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的α-NaFeO2型层状结构,颗粒小且分布均匀,在电压为2.75~4.50 V (vs. Li+/Li) 范围内,以0.2 mA/cm2电流密度下经恒电流充放电测试,其首次放电比容量为183.1 mAh/g,经过50周充放电循环后放电比容量为171.3 mAh/g,表现出较大的初始放电比容量和良好的循环性能。

关键词: 锂离子电池 , 正极材料 , 溶胶-凝胶方法

Cite this article

YANG Zhan-xu, QIAO Qing-dong. The Synthesis and Properties of LiNi0.8Co0.2O2 Cathode Material for Lithium-Ion Batteries[J]. Journal of Petrochemical Universities, 2011, 24(1): 18-20.

杨占旭,乔庆东. 锂离子电池正极材料LiNi0.8Co0.2O2的合成及性能研究[J]. 石油化工高等学校学报, 2011, 24(1): 18-20.