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Ionic conductivity of new dual‐phase polymer electrolyte composed of poly(epichlorohydrin‐ co ‐oxirane) and NBR
Author(s) -
Ju JinLan,
Gu QingChao,
Xu HaiSheng,
Yang ChangZheng
Publication year - 1998
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/(sici)1097-4628(19981010)70:2<353::aid-app15>3.0.co;2-4
Subject(s) - ionic conductivity , epichlorohydrin , materials science , propylene carbonate , conductivity , electrolyte , polymer chemistry , ionic bonding , acrylonitrile , polymer , phase (matter) , polymer blend , chemical engineering , casting , conductive polymer , composite material , ion , chemistry , copolymer , organic chemistry , electrode , engineering
A new type of dual‐phase polymer electrolyte (DPE) film was prepared by mechanical mixing of a poly(epichlorohydrin‐ co ‐oxirane) (ECO) and poly(acrylonitrile‐ co ‐butadiene) rubber (NBR) binary solution and then by solution casting. Both of the polymers are commercially available. The casting films were swollen with a LiClO 4 /propylene carbonate (PC) solution to obtain DPE films. The ionic conductivity of the DPE films was calculated on the basis of alternating current impedance measurements. The results showed that the ionic conductivity is dependent on the content of the LiClO 4 /PC solution and the ECO/NBR blend ratio. High ionic conductivity (>10 −3 S/cm at 298 K) was achieved when the ECO content in the matrix is 90% (w/w), the contentration of LiClO 4 /PC solution is at 3 mol/L, and the weight percent of LiClO 4 /PC is 40. The impedance spectrum provided evidence that a dual‐phase structure was created, in which the ECO phase provided an ion‐conductive pathway and the NBR phase acted as a supportive matrix. A new ionic conductivity mechanism was proposed. © 1998 John Wiley & Sons, Inc. J. Appl. Polym. Sci. 70: 353–357, 1998