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化学学报
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化学学报 ›› 2009, Vol. 0 ›› Issue (1): 1-5.    下一篇

研究论文

三维有序大孔SnO2的制备及作为锂离子电池负极材料的电化学性能研究

赵铁鹏高德淑2,李朝晖雷钢铁周姬   

  • 投稿日期:2008-06-18 修回日期:2008-08-04 发布日期:2009-12-30
  • 通讯作者: 高德淑 E-mail:huangzaibo@yahoo.com.cn;gaod@xtu.edu.cn
  • 基金资助:
    湖南省科技厅(2001年重点项目No.200109)和湘潭市科技局(No.GY2008-2)资助项目

Preparation and Characterization of Three-dimensionally Ordered Macroporous SnO2 Microparticles as Lithium Ion Battery Anode

  • Received:2008-06-18 Revised:2008-08-04 Published:2009-12-30

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本文通过聚苯乙烯（PS）胶晶模板法合成了三维有序大孔(3DOM ) SnO2，运用扫描电镜、热重分析、X-射线衍射、电化学充放电等多种方法对其结构和性能进行了表征和研究。SEM图表明PS胶晶模板微球排列规整,大小均匀(直径275 ±10 nm),形成多层六方紧密堆积排列；煅烧除去模板后的3DOM SnO2呈三维多孔网络结构，具有圆型和六边形的孔隙形貌，其孔径大小为215±10 nm；孔壁由SnO2纳米晶粒组成，壁厚为20-30 nm。XRD图谱表明经过煅烧除去模板后，形成了纯SnO2相。当作为锂离子电池负极材料时，3DOM SnO2首次充放电容量分别为1704 mAh/g 和 769 mAh/g，表现出较好的充放电容量和库仑效率。此外，这种合成方法简单、经济,可进一步应用于其它锂离子电池材料的合成。

关键词: 锂离子电池, 负极材料, SnO2, 大孔, 模板

Three-dimensionally ordered macroporous (3DOM) SnO2 was synthesized by using polystyrene (PS) colloidal crystal templates. The character of 3DOM SnO2 was measured by scanning electron microscopy (SEM), thermogravimetry (TG), X-ray diffraction (XRD) and electrochemical measurement. SEM images showed that the PS colloidal crystal template and the 3DOM SnO2 were arrayed periodically in face. The microparticles were composed of circularity or hexagonally porous and the thin porous wall was formed by nanocrystals of SnO2.The macropore diameters of the 3DOM SnO2 were between 215±10 nm and the pore wall thicknesses were between 20-30 nm. X-ray diffraction indicated that a pure SnO2 phase was produced after calcining. When the 3DOM SnO2 microparticles were used as anode materials for lithium ion battery; they exhibited extraordinarily high discharge/charge capacities and columbic efficiency. In addition, the reported synthetic procedure is easy and inexpensive which can be extended for the synthesis of other 3DOM materials for lithium ion batteries.

Key words: lithium ion battery, Anode material, Tin dioxide, macroporous, Template