Nanostructured Proton Conductors Formed via in Situ Polymerization of Ionic Liquid Crystals

Lü, Fei; Gao, Xinpei; Dong, Bin; Sun, Panpan; Sun, Nan; Xie, Shuting; Zheng, Liqiang

doi:10.1021/am504504m

Cited by 40 publications

(33 citation statements)

References 51 publications

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“…Based on a fitting of the equivalent circuit ( Fig. 5d), in steady-state conditions (without elongation), the pure hydrogel showed the lowest conductivity (0.005-0.0075 S cm −1 ), which was comparable to hydrogel electrolytes proposed by others, ranging typically within 1-2 mS cm −1 [71]. Likewise, the hydrogel containing only 0.1 wt % carbon (and carbon-grafted-PPy) revealed some improvement of conductivity due to the presence of electronically conductive phase (with the graphenegrafted-PPy offering the highest conductivity).…”

Section: Electrochemical Analysis: Conductivity and Interfacial Gravisupporting

confidence: 61%

Stretchable current collectors based on carbon embedded in a poly (acrylamide)/poly (N,N-methylenebisacrylamide) hydrogel modified with Nafion 117®

Radtke

Ignaszak

2018

Mater Renew Sustain Energy

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In this study, we optimized the dispersion of hydrophobic carbons within ionically conductive hydrogels composed of a poly (acrylamide)-pAAm/poly (N,N-methylenebisacrylamide)-pMBAA modified with Nafion 117 ®. The carbon-embedded hydrogel films were prepared by in situ UV polymerization of aqueous suspension containing KCl, acrylamide and N,Nmethylenebisacrylamide monomers, the multi-walled-carbon nanotubes, graphene, single-walled carbon nanohorns, and their composites with polypyrrole. These electrodes were translucent, stretchable, ionically and electronically conductive at low carbon content. In addition, they were very flexible, reaching a stretch up to 1475.57% of their initial length. Mechanical characteristics and conductivity were measured at their maximum hydration, corresponding to water uptake of 47.20% after 5 days of curing in humidity chamber. Hydrogels with dispersed carbon demonstrated both ionic and electronic conductivity in hydrated state and electronic conductivity alone when the electrode was dry. Nafion 117 ® acted as a surfactant and played a significant role in the improvement of carbon distribution within the hydrogel due to the hydrophobic-hydrophilic interaction between hydrogel, Nafion and the carbon. This was further correlated with changes in zeta potential at the carbon-hydrogel interface upon addition of Nafion, measured using a rotating disk electrode voltammetry.

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Section: Electrochemical Analysis: Conductivity and Interfacial Gravisupporting

confidence: 61%

Stretchable current collectors based on carbon embedded in a poly (acrylamide)/poly (N,N-methylenebisacrylamide) hydrogel modified with Nafion 117®

Radtke

Ignaszak

2018

Mater Renew Sustain Energy

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“…Ionic liquid crystals with hexagonal and lamellar phases with proton‐transporting properties were obtained by photopolymerization of an amphiphilic zwitterion formed from 3‐(1‐vinyl‐3‐imidazolio)propanesulfonate and 4‐dodecylbenzenesulfonic acid; the structural organization was retained during the photocuring. The polymerized films with nanostructured channels have higher ionic conductivities and lower activation energies than the common electrolyte membrane Nafion 117 …”

Section: Applicationsmentioning

confidence: 99%

Photoinitiated polymerization in ionic liquids and its application

Andrzejewska

2016

Polymer International

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Ionic liquids (ILs) are low-melting organic salts often liquid at room temperature, whose unique properties are the reason of increasing interest for their applications as solvents, reaction media and functional additives. The exceptional properties of ILs have proved to be particularly useful in polymer science giving the potential to produce polymeric materials with improved properties or to immobilize ILs in polymer matrices while keeping their special characteristics. One of the possibilities is polymerization in ILs which can also affect positively polymerization reactions. An especially attractive technique is photopolymerization due to the ease of process control, short reaction time and ambient working temperature. This review gives a literature survey of developments in photopolymerization processes carried out in ILs as well as applications of these processes. It covers both the photopolymerization in ILs as well as photopolymerization of IL monomers. The first part presents a short overview of physicochemical and photochemical properties of ILs; it includes also photochemical reactions and photoinitiation of polymerization in ILs. The second part covers both the basic research (kinetics of photopolymerization including polymerization rate coefficients and polymerization of IL monomers) as well as applications of UV-induced polymerization in ILs.

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“…have also recently reported polymer LCs with hexagonal and lamellar phases and excellent ionic conductivities, with conductivities of 0.129 S/cm reached for the hexagonal phase at 25 8C and 0.187 S/cm reached for the lamellar phase at 85 8C. [86] The polymers were synthesized from self-assembled monomers of 4-dodecyl benzenesulfonic acid and 3-(1-vinyl-3-imidazolio)-propanesulfonate. The topological ordered nanostructured channels of the material are proton pathways that are fixated in space via photopolymerization of the monomers with photoinitiator 2,2-dimethoxy-2phenylacetophenone to give a film with high conductivity, due to the order and size of the nanostructures.…”

Section: Liquid Crystalline Polymersmentioning

confidence: 92%

“…al . have also recently reported polymer LCs with hexagonal and lamellar phases and excellent ionic conductivities, with conductivities of 0.129 S/cm reached for the hexagonal phase at 25 °C and 0.187 S/cm reached for the lamellar phase at 85 °C . The polymers were synthesized from self‐assembled monomers of 4‐dodecyl benzenesulfonic acid and 3‐(1‐vinyl‐3‐imidazolio)‐propanesulfonate.…”

Section: Photopolymerized Ils and Their Applicationmentioning

confidence: 99%

Photopolymerization of Ionic Liquids – A Mutually Beneficial Approach for Materials Fabrication

Guterman

Smith

2018

Israel Journal of Chemistry

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Photopolymerization is a convenient fabrication technique with the power to control the polymerization in both time and space, be solvent free, and use simple equipment to initiate the polymerization reaction. These features are conditional on use of liquid monomers and crosslinkers that do not require solvent for processing. One class of compounds that provides these opportunities are ionic liquid (IL) monomers, which possess negligible vapour pressure and are free‐flowing liquids at room temperature. For these reasons, ILs and photopolymerization are complementary to each other towards the fabrication of electrolyte materials by circumventing the innate difficulty in processing PILs as melts. Instead, the electrolyte polymer is formed as a crosslinked material directly where it will be used. In this review, we outline recent work demonstrating the key benefits of this unlikely marriage, including formulation design, applications in coatings, membranes, and others.

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Nanostructured Proton Conductors Formed via in Situ Polymerization of Ionic Liquid Crystals

Cited by 40 publications

References 51 publications

Stretchable current collectors based on carbon embedded in a poly (acrylamide)/poly (N,N-methylenebisacrylamide) hydrogel modified with Nafion 117®

Stretchable current collectors based on carbon embedded in a poly (acrylamide)/poly (N,N-methylenebisacrylamide) hydrogel modified with Nafion 117®

Photoinitiated polymerization in ionic liquids and its application

Photopolymerization of Ionic Liquids – A Mutually Beneficial Approach for Materials Fabrication

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