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Comb-like solid polymer electrolyte based on polyethylene glycol-grafted sulfonated polyether ether ketone
journal contribution
posted on 2017-11-20, 00:00 authored by M Guo, M Zhang, D He, J Hu, Xiaoen Wang, C Gong, X Xie, Z XueSolid polymer electrolytes based on a novel comb-like copolymer, polyethylene glycol-grafted sulfonated polyether ether ketone (SPEEK-g-PEG), was designed and synthesized through the reaction between partially hydroxyl-functionalized sulfonated polyether ether ketone (SPEEK) and epoxy-functionalized PEG. The resulting SPEEK-g-PEG was fully characterized by FTIR, 1H NMR, TGA, and DSC. All data proved the successful grafting of PEG onto the SPEEK main chain. The resulting comb-like structure effectively inhibited the crystallization of PEG. After doping with a lithium salt, the obtained SPEEK-g-PEG polymer electrolyte membrane showed an improved ionic conductivity. The effects of chain length and PEG grafting ratio on the ionic conductivity of SPEEK-g-PEG were also investigated by electrochemical impedance spectroscopy (EIS). Moreover, the effect of this comb-like structure on increasing the ionic conductivity is higher than that of SPEEK/PEG blends, making these comb-like SPEEK-g-PEG copolymers attractive for an application in LIBs.
History
Journal
Electrochimica ActaVolume
255Article number
CPagination
396 - 404Publisher
ElsevierLocation
Amsterdam, The NetherlandsPublisher DOI
ISSN
0013-4686Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2017, ElsevierUsage metrics
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No categories selectedKeywords
solid polymer electrolytecomb-like polymerpolyether ether ketonepolyethylene glycollithium ion batteriesScience & TechnologyPhysical SciencesElectrochemistryBLOCK-COPOLYMER ELECTROLYTESHIGH IONIC-CONDUCTIVITYAB-INITIO CALCULATIONSLITHIUM BATTERIESMICROPHASE SEPARATIONPOLY(ETHYLENE OXIDE)MOLECULAR-WEIGHTCOMPLEXESPEOCHALLENGES
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