高等学校化学学报 ›› 2010, Vol. 31 ›› Issue (11): 2148.

• 研究论文 • 上一篇    下一篇

锂离子电池正极材料Li2FeSiO4/C的改性研究

和兴广, 杨桂玲, 孙立群, 谢海明, 王荣顺   

  1. 东北师范大学化学学院, 吉林省锂离子电池材料科技创新中心, 长春 130024
  • 收稿日期:2009-11-30 出版日期:2010-11-10 发布日期:2010-11-10
  • 通讯作者: 王荣顺, 男, 教授, 博士生导师, 主要从事应用量子化学和功能材料研究. E-mail: wangrs@nenu.edu.cn
  • 基金资助:

    国家科技支撑计划(批准号: 2009BAG19B00)和吉林省科技发展计划(批准号: 20076020, 20080304)资助.

Research on Modification of Cathode Material Li2FeSiO4/C for Lithium-ion Battery

HE Xing-Guang, YANG Gui-Ling, SUN Li-Qun, XIE Hai-Ming, WANG Rong-Shun*   

  1. Department of Chemistry, Northeast Normal University, Materials Science and Technology Center of Lithium Ion Battery, Changchun 130024, China
  • Received:2009-11-30 Online:2010-11-10 Published:2010-11-10
  • Contact: WANG Rong-Shun. E-mail: wangrs@nenu.edu.cn
  • Supported by:

    国家科技支撑计划(批准号: 2009BAG19B00)和吉林省科技发展计划(批准号: 20076020, 20080304)资助.

摘要: 采用改进的溶胶-凝胶法合成了Li2Fe1-xMnxSiO4/C(x=0, 1/4, 1/3, 1/2)复合材料. 用X射线衍射(XRD)、拉曼光谱和扫描电子显微镜(SEM)对材料的结构和形貌进行了表征. 通过恒流充放电对材料的电化学性能进行了测试. 结果表明, 在室温、1.5~4.8 V电压范围内, 于C/16倍率下进行充放电测试时, Li2Fe3/4Mn1/4SiO4/C具有较高的首次放电比容量(201.0 mA·h/g), 具有良好的电化学性能.

关键词: 锂离子电池, 正极材料, Li2FeSiO4

Abstract: Li2Fe1-xMnxSiO4/C(x=0, 1/4, 1/3, 1/2) cathodes materials were synthesized by modified sol-gel method. The structure and morphology of the materials were characterized by XRD, Raman scattering spectra and SEM. The electrochemical properties of the materials were tested by constant-current cyclic testing. The results show that Li2Fe3/4Mn1/4SiO4/C has a good electrochemical performance. The first discharge capacity of Li2Fe3/4Mn1/4SiO4/C cathode material at room temperature reaches 201.0 mA·h/g when cycled at C/16 between 1.5 and 4.8 V.

Key words: Li-ion battery, Cathode material, Li2FeSiO4

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