物理化学学报 >> 2006, Vol. 22 >> Issue (09): 1111-1115.doi: 10.1016/S1872-1508(06)60051-X

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LiF-Ni纳米复合薄膜的电化学性能研究

周永宁;吴长亮;张华;吴晓京;傅正文   

  1. (复旦大学化学系激光化学研究所, 复旦大学材料科学系, 上海市分子催化和功能材料重点实验室, 上海 200433)
  • 收稿日期:2006-03-03 修回日期:2006-04-26 发布日期:2006-09-04
  • 通讯作者: 傅正文 E-mail:zhengwen@sh163.net

The Electrochemical Properties of LiF-Ni Nanocomposite Thin Film

ZHOU Yong-Ning;WU Chang-Liang;ZHANG Hua;WU Xiao-Jing;FU Zheng-Wen   

  1. (Department of Chemistry and Laser Chemistry Institute, Department of Materials Science, Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Fudan University, Shanghai 200433, P. R. China)
  • Received:2006-03-03 Revised:2006-04-26 Published:2006-09-04
  • Contact: FU Zheng-Wen E-mail:zhengwen@sh163.net

摘要: 采用脉冲激光沉积法在不锈钢基片上制备了LiF-Ni纳米复合薄膜, 用充放电和循环伏安实验测量了该薄膜的电化学性能. 首次充电容量为107 mAh•g−1, 它对应第一次释放锂的过程. 在充放电循环过程中, 锂的嵌入、脱出通过非原位高分辨电子显微和选区电子衍射得到证实. 这一结果为LiF可以由过渡金属Ni驱动分解提供了直接的实验证据.

关键词: LiF-Ni, 纳米复合薄膜, 脉冲激光沉积, 电化学反应

Abstract: Nanocomposite of LiF-Ni with a highly heterogeneous mixture was fabricated using pulsed laser deposition (PLD) method, and it exhibited remarkable electrochemical activity. The electrochemical reaction of LiF-Ni nanocomposite thin-film electrode with Li was firstly investigated by the discharge/charge and cyclic voltammetry. The initial charge capacity of the LiF-Ni/Li cell was found to be 107 mAh•g−1. The process of releasing Li from the as-deposited LiF-Ni nanocomposite thin films was confirmed by ex-situ high-resolution transmission electron microscopy and by the selected area electron diffraction measurements. These results provided a direct experimental evidence to support the electrochemical decomposition of LiF driven by the transition metal Ni in the potential range from 1.0 V to 4.0 V. LiF-Ni nanocomposite electrodes could be a novel candidate that could be used as an appropriate for Li storage material.

Key words: LiF-Ni, Nanocomposite thin film, Pulsed laser deposition, Electrochemical reaction