Bis(trifluoromethylsulfonyl)amide based “polymeric ionic liquids”: Synthesis, purification and peculiarities of structure–properties relationships (original) (raw)
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Development of new class of ion conductive polymers based on ionic liquids
Electrochimica Acta, 2004
A series of polymerizable ionic liquid was synthesized and polymerized to prepare new type polymer electrolytes. The effects of position of imidazolium cation, spacer structure and length, and anion species on the ionic conductivity have been investigated. Polycation-type ionic liquids having flexible long spacer showed the ionic conductivity of about 10 −4 S cm −1 at room temperature. Polyanion-type ionic liquids without spacer structure also showed about 10 −4 S cm −1 at room temperature. Both examples strongly suggested that the freedom of imidazolium cation affected greatly on the ionic conductivity. Both systems maintained quite low glass transition temperature of about −60 • C after polymerization.
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Journal of Polymer Science Part A: Polymer Chemistry, 2009
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Journal of the Korean Electrochemical Society, 2010
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Polymer Science Series B, 2013
A number of methacrylate ionic monomers with different structures and mobilities of ionic centers were synthesized. The free radical polymerization of these monomers in solution affords high molecular mass (M sD = 0.5 to 2.5 × 10 6) thermally stable (T dec > 170°C) polyelectrolytes or cationic or anionic "polymeric ionic liquids." The conductivities of polycation and polyanion derived coatings are (7.4 × 10 ⎯10)-(7.6 × 10 ⎯7) and (4.9 × 10-10)-(1.6 × 10-7) S/cm (25°C), respectively. As exemplified by poly(1 [3 (methacryloy loxy)propyl] 3 methylimidazolium bis[(trifluoromethanesulfonyl)imide]), the molecular mass and glass transition temperature of the polymer affect the ionic conductivity of the film coating. The transition from lin ear polyelectrolytes to crosslinked systems based on ionic monomers and poly(ethylene glycol dimethacrylate) 750 leads to the formation of elastic films featuring satisfactory strength, reduced glass transition temperatures (-8 to +15°C), and increased ionic conductivity (up to 3.2 × 10 ⎯6 S/cm (25°C)).
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Polymers
Polymerized ionic liquids (PILs) are interesting new materials in sustainable technologies for energy storage and for gas sensor devices, and they provide high ion conductivity as solid polymer electrolytes in batteries. We introduce here the effect of polar protic (aqueous) and polar aprotic (propylene carbonate, PC) electrolytes, with the same concentration of lithium bis(trifluoromethane) sulfonimide (LiTFSI) on hydrophobic PIL films. Cyclic voltammetry, scanning ionic conductance microscopy and square wave voltammetry were performed, revealing that the PIL films had better electroactivity in the aqueous electrolyte and three times higher ion conductivity was obtained from electrochemical impedance spectroscopy measurements. Their energy storage capability was investigated with chronopotentiometric measurements, and it revealed 1.6 times higher specific capacitance in the aqueous electrolyte as well as novel sensor properties regarding the applied solvents. The PIL films were cha...
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Polymer International, 2017
This manuscript presents the work carried out within the European Project RENAISSANCE-ITN, which was dedicated to the development of innovative polyelectrolytes for energy and environmental applications. Within the project different types of innovative polyelectrolytes were synthesized such as poly(ionic liquid)s coming from renewable or natural ions, thiazolium cations, cathechol functionalities or from a new generation of cheap deep-eutectic monomers. Further, macromolecular architectures such as new poly(ionic liquid) block copolymers and new (semi)conducting polymer/polyelectrolyte complexes were also developed. As the final goal, the application of these innovative polymers in energy and environment was investigated. Important advances in energy storage technologies included the development of new carbonaceous materials, new lignin/conducting polymer biopolymer electrodes, new iongels and single-ion conducting polymer electrolytes for supercapacitors and batteries and new poly(ionic liquid) binders for batteries. On the other hand, the use of the innovative polyelectrolytes into sustainable environmental technologies led to the development of new liquid and dry water, new materials for water cleaning technologies such as floculants, oil absorbers, new recyclable organocatalysts platform and multifunctional polymer coatings with antifouling and antimicrobial properties. All in all this article demonstrates the potential of the poly(ionic liquid)s for high-value applications in Energy&Enviromental areas.
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Polymers for Advanced Technologies, 2002
Ionic liquid monomer couples were prepared by the neutralization of 1-vinylimidazole with vinylsulfonic acid or 3-sulfopropyl acrylate. These ionic liquid monomer couples were viscous liquid at room temperature and showed low glass transition temperature (Tg) at À83°C and À73°C, respectively. These monomer couples were copolymerized to prepare ion conductive polymer matrix. Thus prepared ionic liquid copolymers had no carrier ions, and they showed very low ionic conductivity of below 10 À9 S cm À1. Equimolar amount of lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) to imidazolium salt unit was then added to generate carrier ions in the ionic liquid copolymers. Poly(vinylimidazolium-co-vinylsulfonate) containing equimolar LiTFSI showed the ionic conductivity of 4 Â 10 À8 S cm À1 at 30°C. Advanced copolymer, poly(vinylimidazolium-co-3-sulfopropyl acrylate) which has flexible spacer between the anionic charge and polymer main chain, showed the ionic conductivity of about 10 À6 S cm À1 at 30°C, which is 100 times higher than that of copolymer without spacer. Even an excess amount of LiTFSI was added, the ionic conductivity of the copolymer kept this conductivity. This tendency is completely different from the typical polyether systems.