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电化学(中英文) ›› 1997, Vol. 3 ›› Issue (4): 378-382. 

• 研究论文 • 上一篇    下一篇

Li/α-Sn(HPO_4)_2电池及其反应机理

林原,蔡润良,吴浩青   

  1. 复旦大学化学系
  • 收稿日期:1997-11-28 修回日期:1997-11-28 出版日期:1997-11-28 发布日期:1997-11-28

Li/α-Sn(HPO4)2 Cell and its Reaction Mechanism

Lin Yuan Cai Runliang Wu Haoqing*   

  1. (Dept. of Chem., Fudan Univ., Shanghai 200433)
  • Received:1997-11-28 Revised:1997-11-28 Published:1997-11-28 Online:1997-11-28

摘要: 应用X射线衍射分析(XRD)、X射线光电子能谱分析(XPS)和三角波电位扫描研究了Li/α-Sn(HPO4)2电池的阴极反应机理.实验结果表明,电池反应的实质是锂在正极内进行电化学嵌入,并在达到一定的嵌入度后析出新相Sn.应用电化学暂态方法测得嵌入的锂离子于正极内部的化学扩散系数约为10-12~10-13cm2·s-1.

关键词: Li/α-Sn(HPO_4)_2电池, 反应机理, 嵌入反应

Abstract: The discharge mechanism of Li/αSn(HPO4)2 cell has been investigated by means of Xray diffraction, XPS and cyclic voltammetry methodes. It has been shown that the electrochemical intercalation reation exists in the cathode material. There is a new phase after some degree of intercalation. With potential step and galvanostatic techniques, the chemical diffusion cofficients of Li+ in LixSn(HPO4)2 is estimated to be 10-12~10-13 cm2·s-1.

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