高等学校化学学报

高等学校化学学报 ›› 2013, Vol. 34 ›› Issue (3): 668-673.doi: 10.7503/cjcu20120498

• 物理化学 • 上一篇    下一篇

锂离子电池用α-Fe2O3-Ag复合纳米棒负极材料的制备及储锂性能

吴平1,2, 杜宁1, 张辉1, 杨德仁1, 陆天虹2   

  1. 1. 硅材料国家重点实验室, 浙江大学材料科学与工程学系, 杭州 310027;
    2. 江苏省新型动力电池重点实验室, 南京师范大学化学与材料科学学院, 南京 210046
  • 收稿日期:2012-05-25 出版日期:2013-03-10 发布日期:2013-02-18
  • 通讯作者: 张辉,男,博士,副教授,主要从事新能源材料研究.E-mail:msezhanghui@zju.edu.cn E-mail:msezhanghui@zju.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:50802086,51002133)资助.

Synthesis and Lithium Storage Performance of α-Fe2O3-Ag Hybrid Nanorod Anode for Lithium-ion Batteries

WU Ping1,2, DU Ning1, ZHANG Hui1, YANG De-Ren1, LU Tian-Hong2   

  1. 1. State Key Lab of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China;
    2. Jiangsu Province Key Laboratory of New Power Batteries, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210046, China
  • Received:2012-05-25 Online:2013-03-10 Published:2013-02-18
  • Contact: Hui Zhang E-mail:msezhanghui@zju.edu.cn

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摘要：

采用FeOOH纳米棒为前驱体, 通过层层自组装法及随后的热处理过程制备出α-Fe2O3-Ag复合纳米棒. 采用透射电子显微镜(TEM)、 高分辨透射电子显微镜(HRTEM)和电化学性能测试对样品的形貌、 结构及电化学性能进行了表征. 结果表明, Ag纳米颗粒均匀地分布在α-Fe2O3纳米棒的表面. 作为锂离子电池负极材料, α-Fe2O3-Ag复合纳米棒表现出了较好的循环性能和较高的比容量. 180个循环后, 其比容量高达549.8 mA·h/g.

关键词: 锂离子电池, 负极材料, α-Fe2O3-Ag复合纳米棒, 层层自组装法, 储锂性能

Abstract:

Using FeOOH nanorods as precursors, α-Fe2O3-Ag hybrid nanorods were prepared through a novel layer-by-layer assembly and subsequent annealing approach. The morphology, structure and electrochemical performance of the products were characterized by transmission electron microscopy(TEM), high-resolution transmission electron microscopy(HRTEM), and electrochemical tests. It is indicated that numerous Ag nanoparticles are homogeneously distributed on the surface of α-Fe2O3 nanorod. When evaluated as an anode for Li-ion battery, the α-Fe2O3-Ag hybrid nanorods exhibit better cyclic performance and higher capacities. A high capacity of 549.8 mA·h/g can be retained after 180 discharge/charge cycles.

Key words: Li-ion battery, Anode, α-Fe2O3-Ag hybrid nanorods, Layer-by-layer assembly, Lithium storage performance

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