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7747294 
Journal Article 
Determination of the interaction within polyester-based solid polymer electrolyte using FTIR spectroscopy 
Wu, I; Chang, FC 
2007 
1 
Polymer
ISSN: 0032-3861 
Elsevier BV 
OXFORD 
48 
4 
989-996 
English 
WOS:000244509400008 
Characterization and interaction behavior between Li+ ion and C{double bond, long}O groups of a series polyester electrolyte have been thoroughly examined using Fourier transform infrared (FTIR). The "free/Li+ bonded" C{double bond, long}O absorptivity coefficient of the LiClO4/polyester can be determined quantitatively using FTIR spectrum ranging from 1800 to 1650 cm-1 at 80 °C. Results from curve fitting show that the "free/Li+ bonded" C{double bond, long}O absorptivity coefficient is 0.144 ± 0.005. The C{double bond, long}O group of polymer electrolyte shows strong interaction with Li+ ion and a limit value of 95% "Li+ bonded" C{double bond, long}O is approached in the polymer electrolyte system when the Li+ ion equivalent fraction is about 0.28. The molecular structure of polyester electrolyte does not affect significantly the efficiency of interaction between Li+ ion and C{double bond, long}O. © 2007. 
polymer electrolyte; polyester; FTIR