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Electrochemical Study of PW12O in Poly(ethylene glycol) Electrolyte

✍ Scribed by Feng Zhao; Ningyu Gu; Shaoqin Liu; Zhenxin Wang; Shaojun Dong

Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
101 KB
Volume
15
Category
Article
ISSN
1040-0397

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✦ Synopsis

Abstract

The electrochemical properties of PW~12~O$\rm{_{40}^{3-}}$ (abbreviated as PW~12~) anion in poly(ethylene glycol) (PEG) have been studied by cyclic voltammetry, complex impedance and FT‐IR spectroscopy. The PW~12~ anion in PEG‐LiClO~4~ electrolyte shows reasonable facile electrochemistry, and the diffusion coefficients of PW~12~ were measured with microelectrode. It is shown that ionic conductivity of polymer electrolytes based on low molecular weight PEG can be improved by the addition of PW~12~. The increase of conductivity is coupled with decrease of transient cross‐links density of polymer chains which is evidenced by the downshift of COC stretching mode. The phenomena are explained in view of ion‐ion and ion‐polymer interactions.

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