High-performance ion gel with tetra-PEG network

Fujii, Kenta; Asai, H.; Ueki, Takeshi; Sakai, Takamasa; Imaizumi, Satoru; Chung, Ung‐il; Watanabe, Masayoshi; Shibayama, Mitsuhiro

doi:10.1039/c2sm07119c

Cited by 134 publications

(135 citation statements)

References 28 publications

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“…A self-standing PE membrane can be readily obtained by introducing either physical or chemical crosslinking points on the polymers. A polymer gel membrane swollen with ILs (called ion gels) was prepared by the in situ polymerization of vinyl monomers [31,32], by the cross-end coupling reaction of tetra-arm poly(ethylene glycol) [33], or by the self-assembly of ABA-type triblock copolymers where A and B are insoluble and soluble sequences, respectively [33][34][35][36].…”

Section: Resultsmentioning

confidence: 99%

Li+ Ion Transport in Polymer Electrolytes Based on a Glyme-Li Salt Solvate Ionic Liquid

Kido

Ueno

Iwata

et al. 2015

Electrochimica Acta

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Keywords: solvate ionic liquid polymer electrolyte polymer-in-salt ionicity glyme A B S T R A C T Polymer electrolytes (PEs) have served as the focus of intensive research as new ion-conducting materials, especially for lithium battery applications. A new strategy to develop fast lithium-conducting PEs is reported here. The thermal, ionic transport, and electrochemical properties of polymer solutions in a glyme-Li salt solvate ionic liquid, [Li(G4) 1 ][TFSA], composed of an equimolar mixture of lithium bis (trifluoromethanesulfonyl) amide (Li[TFSA]) and tetraglyme (G4), were characterized. Poly(ethylene oxide) (PEO), poly(methyl methacrylate) (PMMA), and poly(butyl acrylate) (PBA) were combined with [Li(G4) 1 ][TFSA] in order to explore the effects of polymer structure on the properties. The self-diffusion coefficient ratio of the glyme and Li + ions (D G /D Li ) was investigated to evaluate the stability of the complex (solvate) cations. The D G /D Li values suggested that the [Li(G4) 1 ] + complex cations underwent a ligand exchange reaction between G4 and PEO in the PEO-based solution, whereas the cations remained stable (D G /D Li = 1) in the PMMA-and PBA-based solutions. The robustness of the [Li(G4) 1 ] + complex cations in the PMMA-and PBA-based solutions was reflected in high weight-loss temperature, greater Li transference number, and high oxidative stability.Owing to the lower glass transition temperature and low affinity towards Li + ions, the PBA-based solutions yielded superior lithium transport properties (ionic conductivity of 10 À4 $10 À3 Scm À1 and Li transference number as high as 0.5) among the investigated polymer solutions.

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Section: Resultsmentioning

confidence: 99%

Li+ Ion Transport in Polymer Electrolytes Based on a Glyme-Li Salt Solvate Ionic Liquid

Kido

Ueno

Iwata

et al. 2015

Electrochimica Acta

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“…We investigated the CO2 permselectivity and solubility for the tetra-armed poly(ethylene glycol) (Tetra-PEG) [emim][Tf2N] ion gel 51) . The previous study reported that the gel is mechanically robust (the maximum breaking strength by compression reaches 18 MPa) and thermally stable (up to 300 ) even at 6 wt% polymer content 52) . Figure 5 shows the CO2 permeability and selectivity for the Tetra-PEG [emim][Tf2N] membrane (94 wt%-IL) and the [emim] [Tf2N] SILM as a function of temperature.…”

Section: Chemical Absorbentmentioning

confidence: 99%

CO<sub>2</sub> Absorption Property of Ionic Liquid and CO<sub>2</sub> Permselectivity for Ionic Liquid Membrane

Makino

Kanakubo

2016

J. Jpn. Petrol. Inst.

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The aim of this review is to provide some information on the CO2 absorption property of ionic liquids and the CO2 permselectivity for the separation membranes using ionic liquids. Ionic liquids are a unique solvent, of which the characteristics are non-volatile, non-flammable, miscible with various chemicals, and so on. The CO2 capture using ionic liquids is a promising technology, and a variety of studies have been reported on the natures of the ionic liquid absorbents and membranes. This review presents some fundamental data on the following three topics: (1) the CO2 solubility in the ionic liquid physical absorbents; (2) the high-pressure CO2 absorption behavior for the ionic liquid chemical absorbents; (3) the CO2 permselectivity for the inclusion membranes with ionic liquids and polymers. The first two topics describe the effects of the chemical structures of ionic liquids on the CO2 solubility, in particular, in terms of the oxygen containing groups and the interionic interactions. The second topic also contains how amino acid anions affect the physical and chemical absorptions under high CO2 pressure conditions. The last topic reported that the CO2 and N2 permeations in the inclusion membranes depend on the composition and kind of polymers.

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“…Outstanding ionogels were produced by Fujii et al exhibiting very high ionic conductivities (7.7-8.5 mS cm -1 ) and tensile breaking strains (310%-380%), but low tensile strengths of just 15-33 kPa [18]. Although there are many reports of flexible solid ionogel electrolytes, few report high elastic mechanical properties, and, few have attempted to demonstrate their function in a stretchable electrochemical cell.…”

Section: Introductionmentioning

confidence: 99%

“…High compliance and flexible electrolytes have been prepared by forming polymer networks within a range of ionic liquids, and the resulting solids are referred to as ionogels [14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

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High strain stretchable solid electrolytes

Saricilar

Antiohos

Shu

et al. 2013

Electrochemistry Communications

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Wearable electronic devices that can be integrated seamlessly into clothing for monitoring and feedback need to be not only flexible, but also stretchable with low stiffness. Currently there are few solid electrolytes that are sufficiently stretchable for wearable electronic devices. Here we report stretchable solid electrolytes that can be elastically stretched more than 500% of their original length with ionic conductivities as high as 7 x 10(-5) S cm(-1) and tensile breaking strengths larger than 1. Highlights• Stretchable and flexible solid electrolyte with elastic strains larger than 500% and ionic conductivities as high as 7×10 -5 S cm -1 .• Stretchable and flexible supercapacitor with capacitance of 4 F g -1 .

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High-performance ion gel with tetra-PEG network

Abstract: † Electronic supplementary information (ESI) available: Synthesis, method and supplementary data for fitting parameters obtained from the VTF equation for ionic conductivity (Table S1), photographs of the ion gel (Fig. S1) and TGA (Fig. S2).

Cited by 134 publications

References 28 publications

Li+ Ion Transport in Polymer Electrolytes Based on a Glyme-Li Salt Solvate Ionic Liquid

Li+ Ion Transport in Polymer Electrolytes Based on a Glyme-Li Salt Solvate Ionic Liquid

CO<sub>2</sub> Absorption Property of Ionic Liquid and CO<sub>2</sub> Permselectivity for Ionic Liquid Membrane

High strain stretchable solid electrolytes

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