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4428116 
Journal Article 
Studies on comb-like polymer electrolyte with a nitrile group 
Hou, WH; Chen, CY 
2004 
Yes 
Electrochimica Acta
ISSN: 0013-4686 
PERGAMON-ELSEVIER SCIENCE LTD 
OXFORD 
49 
13 
2105-2112 
English 
WOS:000220149800005 
The behavior of lithium ions in a comb-like polymer electrolyte with a nitrile group has been characterized by differential scanning calorimeter (DSC), thermogravimetric analysis (TGA), ac impedance, Fourier transform infrared (FTIR) spectroscopy, and Li-7 solid-state NMR measurements. The comb-like copolymer is synthesized by poly(ethylene glycol-methyl ether methacrylate) (PEGMEM) and acrylonitrile (AN). FTIR spectra reveal the interactions of Li+ ions with both the ether oxygen of the PEGMEM and the nitrogen atom of the AN segments. Li-7 solid-state NMR spectra demonstrate the interactions of Li+ ions with both the ether oxygen of the PEGMEM and the nitrogen atom of the AN segments. Moreover, Li-7 solid-state NMR shows that the lithium ions are preferentially coordinated to the PEGMEM segment. The T-g increases for the copolymers doped with LiClO4. These results indicate the interactions of Li+ with both PEGMEM and AN segments form transient cross-links. The dependence of the maximum conductivity on the doping lithium ion concentration was determined. The AN unit in the copolymer improves the dissociation of the lithium salt, and the mechanical strength. (C) 2004 Elsevier Ltd. All rights reserved. 
polyelectrolytes; copolymerization; solid-state NMR; conductivity; acrylonitrile