PEO-LiClO4-ZSM-5 Composite Polymer Electrolyte——Effect of ZSM-5 on the Selective Transference of Lithium Ion

Abstract

Abstract: A series of polyethylene oxide(PEO)-based composite polymer electrolytes(CPE), with different kinds of molecular sieves and montmorillonite as the filler, were obtained by solvent casting method. The effects of the filler on the lithium-ion transference number(TLi⁺) of the CPE were investigated by the method of AC impedance coupled with steady-state current techniques. The experiment results showed that the addition of all kinds of fillers could improve TLi⁺ and enhance the ionic conductivity of PEO-LiClO₄ at the same time. However, the highest TLi⁺ of 0.353 was recorded by using Li-ZSM-5 as the filler. The special two-dimension frameworks of the ZSM-5, which might let the cation Li⁺ to pass through and prevent the passing of the anion ClO-₄, could be used to explain the enhancement of TLi⁺ induced by Li-ZSM-5. High TLi⁺ and RT ionic conductivity ensured the use of PEO-LiClO₄-ZSM-5 as the electrolyte materials for all solid-state rechargeable lithium ion batteries.

Key words: Composite polymer electrolyte, Lithium-ion transference number, Ionic conductivity, Molecular sieves, ZSM-5

CLC Number:

O636

TrendMD:

XI Jing-Yu, MA Xiao-Mei, CUI Meng-Zhong, TANG Xiao-Zhen. PEO-LiClO₄-ZSM-5 Composite Polymer Electrolyte——Effect of ZSM-5 on the Selective Transference of Lithium Ion[J]. Chem. J. Chinese Universities, 2005, 26(2): 330.

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PEO-LiClO₄-ZSM-5 Composite Polymer Electrolyte——Effect of ZSM-5 on the Selective Transference of Lithium Ion

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