The effect of the length of the oxyethylene chain on the conductivity of the polyurethaneurea electrolyte

Shao Ming Lee, Chuh Yung Chen, Cheng Chien Wang

研究成果: Article同行評審

10 引文 斯高帕斯(Scopus)

摘要

Polyurethaneureas (PUU), which were synthesized from 4,4′- diphenylmethane diisocyanate (MDI), poly(ethylene glycol) (PEG), and 3,5diaminobanzoic acid (DABA), were used as polyelectrolytes in this study. Differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy (FT-IR) were used to monitor the effect of the various kinds of PEG on the changes in morphology of PUU electrolytes corresponding to the concentration of lithium perchlorate (LiClO4) dopants. The results of DSC and FT-IR indicate the Li+ ions coordinate with the soft and hard segments. Additionally, the crystallinity of the PEG soft segment and the ordered hydrogen-bonded urea carbonyl groups decreased with increasing salt concentration. Impedance spectroscopy (IS) measurements show that the PUU electrolyte with the high phase separation degree has the high ionic conductivity. The hard-segment Tg and the soft-segment Tm influence the conductivity behavior of polyelectrolytes with increasing measurement temperature.

原文English
頁(從 - 到)4907-4913
頁數7
期刊Electrochimica Acta
49
發行號27
DOIs
出版狀態Published - 2004 十月 30

All Science Journal Classification (ASJC) codes

  • 化學工程 (全部)
  • 電化學

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