Acta Phys. -Chim. Sin. ›› 2005, Vol. 21 ›› Issue (04): 397-401.doi: 10.3866/PKU.WHXB20050411

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Research on the Enhanced Conductivity of Poly(ethylene oxide) Electrolyte by Adding Zeolite Li-FER

LI Xue-Li; GUO Juan; WU Qiang; CHENG Yan; LONG Ying-Cai; JIANG Zhi-Yu   

  1. Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry,Fudan University, Shanghai 200433
  • Received:2004-08-31 Revised:2004-11-29 Published:2005-04-15
  • Contact: JIANG Zhi-Yu E-mail:zyjiang@fudan.ac.cn

Abstract: Li-ferrierite (Li-FER) fine powder was prepared via an ion exchange process using lithium ions to replace the hydrogen atoms in hydroxyl group of FER. Compared with bare LiClO4 /PEO [poly(ethylene oxide)] polymer electrolyte, the ionic conductivity of PEO composite polymer electrolyte was enhanced more than three orders by adding the Li-FER powder in it. The results of electrochemical measurements show that the Li+ transference number increased obviously by adding the Li-FER powder. The crystal properties of the composite polymer electrolytes were investigated by XRD, DSC, and polarized light microscopy (PLM) methods. It was found that the Li-FER fine powder could act as crystal nucleator to make grain refinement and provide more continuous amorphous domain, in which Li+ ions can move more easily. Therefore the conductivity of the PEO composite polymer electrolytes increased greatly.

Key words: Zeolite, Ferrierite (FER), PEO, Polymer electrolyte, Conductivity