Acta Phys. -Chim. Sin. ›› 2011, Vol. 27 ›› Issue (07): 1695-1700.doi: 10.3866/PKU.WHXB20110708

• ELECTROCHEMISTRY AND NEW ENERGY • Previous Articles     Next Articles

Effects of Tetrahydrofuran Pretreatment on the Performance of Pyrrole Modified Li Metal Electrode

WU Mei-Fen, WEN Zhao-Yin, LIU Yu   

  1. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. China
  • Received:2011-02-18 Revised:2011-04-29 Published:2011-06-28
  • Contact: WEN Zhao-Yin E-mail:zywen@mail.sic.ac.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (50973127), National Key Basic Research Program of China (973) (2007CB209700), and Science and Technology Commission of Shanghai Municipality, China (08DZ2210900).

Abstract:

To get rid of impurities on a Li surface and avoid hydrogen gas generation during the preparation of a lithium pyrrolide film, tetrahydrofuran (THF) was used to pretreat the surface of a Li electrode. We found that THF pretreatment can obviously refresh the Li surface as well as improve the uniformity and density of the lithium pyrrolide film. The interface resistance effectively decreases and the interfacial stability improves. Additionally, the reversibility of the lithium deposition/dissolution process increases. All the ‘sponge-shaped’ lithium deposits are homogeneously distributed on the electrode surface and the lithium cycling efficiency is enhanced by THF pretreatment.

Key words: Li metal, Tetrahydrofuran, Pyrrole, Passive film, Pretreatment

MSC2000: 

  • O646