物理化学学报 >> 2006, Vol. 22 >> Issue (12): 1555 -1559 .doi: 10.3866/PKU.WHXB20061224

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FeSb2纳米棒的溶剂热合成与电化学脱嵌锂性能

秦海英;谢健;糜建立;涂健;赵新兵   

  1. (浙江大学材料科学与工程系, 硅材料国家重点实验室, 杭州 310027)
  • 收稿日期:2006-04-25 修回日期:2006-07-17 发布日期:2006-12-06
  • 通讯作者: 赵新兵 E-mail:Zhaoxb@zju.edu.cn

Solvothermal Synthesis and Electrochemical Lithiation/Delithiation Performance of FeSb2 Nanorods

QIN Hai-Ying;XIE Jian;MI Jian-Li;TU Jian;ZHAO Xin-Bing   

  1. (State Key Laboratory of Silicon Material, Department of Material Science and Engineering, Zhejiang University, Hangzhou 310027, P. R. China)
  • Received:2006-04-25 Revised:2006-07-17 Published:2006-12-06
  • Contact: ZHAO Xin-Bing E-mail:Zhaoxb@zju.edu.cn

摘要: 用溶剂热法合成了作为一种新型锂离子电池负极材料的FeSb2纳米棒. 高分辨透射电镜(HRTEM)观察表明, FeSb2纳米棒的直径为20~40 nm, 长度为0.2~1.0 μm. 恒流充放电测试和循环伏安测试显示, FeSb2纳米棒首次可逆容量达到543 mAh•g−1, 经过10次循环后, 可逆容量保持在353 mAh•g−1. 虽然首次库仑效率仅为64%, 但仍明显优于FeSb2纳米颗粒, 并在10次循环后基本稳定在90%. FeSb2纳米棒在循环过程中仍可能发生粉化和破裂, 导致电极逐渐失效.

关键词: FeSb2纳米棒, 溶剂热合成, 负极材料, 锂离子电池

Abstract: FeSb2 nanorods, as a potential anode material for lithium-ion batteries, were prepared by solvothermal method in the present work. High-resolution transmission electron microscopy (HRTEM) observations show that the FeSb2 nanorods are 20~40 nm in diameter and 0.2~1.0 μm in length. The charge-discharge measurements and cyclic voltammetry tests reveal that the FeSb2 nanorods exhibit the high initial reversible capacity of 543 mAh•g−1 and an approving cycling stability with 353 mAh•g−1 after 10 cycles. Although the initial coulomb efficiency of the FeSb2 nanorods is only 64%, it is better than that of FeSb2 nano-particles and maintains at 90% after 10 cycles. However, the FeSb2 nanorods could be pulverized and cracked during the cyclic voltammetry test resulting in the failure of the electrode.

Key words: FeSb2 nanorods, Solvothermal synthesis, Anode materials, Lithium-ion batteries