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Effect of reaction kinetics of polymer electrolyte on the ion‐conductive behavior for poly(oligo oxyethylene methacrylate)–LiTFSI mixtures
Author(s) -
Kwak GunHo,
Tominaga Yoichi,
Asai Shigeo,
Sumita Masao
Publication year - 2003
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.12375
Subject(s) - ionic conductivity , electrolyte , polymer chemistry , methacrylate , materials science , monomer , glass transition , ionic bonding , lithium (medication) , conductivity , kinetics , polymer , chemistry , ion , organic chemistry , physics , electrode , quantum mechanics , composite material , endocrinology , medicine
The effect of the reaction kinetics on the ionic conductivity for a comblike‐type polyether (MEO) electrolyte with lithium bis(trifluoromethane sulfonyl)imide (LiTFSI) was characterized by DSC, complex impedance measurements, and 1 H pulse NMR spectroscopy. The ionic conductivity of these electrolytes was affected by the reaction condition of the methacrylate monomer and revealed by the glass transition temperature ( T g ), spin–spin relaxation time ( T 2 ), steric effects of the terminal groups, and the number of charge carriers indicated by the VTF kinetic parameter. In this system, the electrolytes prepared by the reaction heating rate of 10°C/min of MEO–H and 15°C/min of MEO–CH 3 showed maximum ionic conductivity, σ i , two to three times higher in magnitude than that of the σ i of the others at room temperature. As experimental results, the reaction kinetic rate affected the degree of conversion, the ionic conductivity, and the relaxation behaviors of polyether electrolytes. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89: 2149–2156, 2003