A route to heat resistant solid membranes with performances of liquid electrolytes

Néouze, Marie-Alexandra; Bideau, Jean Le; Leroux, Fabrice; Vioux, André

doi:10.1039/b416267f

Cited by 147 publications

(178 citation statements)

References 21 publications

(24 reference statements)

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“…35,47 Ionogels are hybrid materials consisting of an ionic liquid confined inside the nano-sized pores of a silica matrix. [48][49][50] The ionogels are obtained as perfect monoliths featuring both the transparency of silica and the outstanding ionic conductivity performances of the ionic liquid, despite the nanometre scale of confinement.…”

Section: Resultsmentioning

confidence: 99%

Ionic liquid as plasticizer for europium(iii)-doped luminescent poly(methyl methacrylate) films

Lunstroot

Driesen

Nockemann

et al. 2010

Phys. Chem. Chem. Phys.

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144

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Flexible luminescent polymer films were obtained by doping europium(III) complexes in blends of poly(methyl methacrylate) (PMMA) and the ionic liquid 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, [C 6 3 ], where nta is 2-naphthoyltrifluoroacetonate, tta is 2-thenoyltrifluoroacetonate, phen is 1,10-phenanthroline, dpa is 2,6-pyridinedicarboxylate (dipicolinate) and choline is the 2-hydroxyethyltrimethyl ammonium cation. Bright red photoluminescence was observed for all the films upon irradiation with ultraviolet radiation. The luminescent films have been investigated by high-resolution steady-state luminescence spectroscopy and by time-resolved measurements. The polymer films doped with b-diketonate complexes are characterized by a very intense 5 D 0 -7 F 2 transition (up to 15 times more intense than the 5 D 0 -7 F 1 ) transition, whereas a marked feature of the PMMA films doped with [choline] 3 [Eu(dpa) 3 ] is the long lifetime of the 5 D 0 excited state (1.8 ms).

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Section: Resultsmentioning

confidence: 99%

Ionic liquid as plasticizer for europium(iii)-doped luminescent poly(methyl methacrylate) films

Lunstroot

Driesen

Nockemann

et al. 2010

Phys. Chem. Chem. Phys.

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144

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“…In our approach, we employed an in situ synthesis of the hosting SiO 2 glass matrix using a non-aqueous sol-gel process with the ionic liquid [BMIM]BF 4 (1-butyl-3-methylimidazolium tetrafluoroborate) and the Li salt (LiTf or LiTFSI) being present in the starting mixture [96,105]. Confining ionic liquids into a SiO 2 matrix via a sol-gel process has been shown to produce stable solid membranes [106][107][108][109][110][111]; the resulting materials have been considered as materials for dye-sensitized solar cells [112,113], electrolytes for fuel cells etc.. In a typical synthesis procedure, tetraethoxysilane (TEOS) was added to a mixture of LiTf and formic acid (HCOOH).…”

Section: Hybrid Inorganic-organic Polymer Electrolytes Containing Ionmentioning

confidence: 99%

Local Li Cation Coordination and Dynamics in Novel Solid Electrolytes

Wüllen¹,

Echelmeyer

Voigt

et al. 2010

Zeitschrift Für Physikalische Chemie

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Ionic TransportResearch on solid ionic conductors for use as electrolytes in all solid state batteries still constitutes a rather vivid branch of today's materials science. Despite enormous efforts, neither the development of a solid electrolyte fulfilling the key requirements such as mechanical stability and high ionic conductivity at ambient temperature has been successful nor has an extended understanding of the local Li coordination motifs in the often amorphous systems been obtained. In this contribution, recent progress both in the development of novel solid state electrolytes with high ionic conductivity and mechanical stability and in the characterization of the local Li coordination motifs in these electrolytes from our laboratory is presented. The work was performed as a project within the framework of the Collaborative Research Centre SFB 458 "Ionic Motion in Materials with Disordered Structures -From Elementary Steps to Macroscopic Transport". Results will be given for polymer electrolytes based on polyethylene oxide (PEO), polyphosphazene (PPZ) and polyacrylonitrile (PAN) with various Li salts, nano-composites of these polymer electrolytes and Al 2 O 3 as a ceramic filler, novel inorganic/organic hybrid electrolytes, in which a mixture of an ionic liquid and Li salt is confined within the pore system of a SiO 2 glass, and a crystalline electrolyte, Li 5 La 3 Nb 2 O 12 . Employing a range of advanced solid state NMR methodologies including dipolar based NMR techniques and pulsed field gradient (PFG) NMR and impedance spectroscopy we were able to obtain a detailed knowledge about the local Li cation coordination motifs and the mechanism of Li transport in these electrolytes. Especially the hybrid electrolytes and the salt rich PAN based polymer electrolytes were identified as rather promising materials which combine a high ionic conductivity and mechanical stability.

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“…In this respect, we can mention a recent report of supercapacitor electrodes based on conducting polymers and metal oxides 17 and conducting polymers and heteropolyacids. 18,19 Heteropolyacids have been applied as electrolyte components in several patents [20][21][22] and as electrolyte in electrochemical supercapacitors.23 Their use as active materials for electrochemical supercapacitors in combination with Ru, conducting polymers, or carbon nanotubes and nanofibers has been recently reported.24-32 On the other hand, ionic liquids have been studied extensively for batteries and fuel cells, [33][34][35][36][37][38] and hybrids of ionic liquid-heteropolyacid based especially on Keggin structures have been reported recently for applications in photochromism, 39 homogeneous catalysis, 40 and as fast proton conductors. 41,42 In this paper, we have investigated the use of ionic liquidheteropolyacid hybrids for applications as supercapacitor electrodes in an environmentally friendly neutral pH electrolyte.…”

mentioning

confidence: 99%

“…23 Their use as active materials for electrochemical supercapacitors in combination with Ru, conducting polymers, or carbon nanotubes and nanofibers has been recently reported. [24][25][26][27][28][29][30][31][32] On the other hand, ionic liquids have been studied extensively for batteries and fuel cells, [33][34][35][36][37][38] and hybrids of ionic liquid-heteropolyacid based especially on Keggin structures have been reported recently for applications in photochromism, 39 homogeneous catalysis, 40 and as fast proton conductors. 41,42 In this paper, we have investigated the use of ionic liquidheteropolyacid hybrids for applications as supercapacitor electrodes in an environmentally friendly neutral pH electrolyte.…”

mentioning

confidence: 99%

Ionic Liquid–Heteropolyacid: Synthesis, Characterization, and Supercapacitor Study of Films Deposited by Electrophoresis

Ammam

Fransaer

2011

J. Electrochem. Soc.

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Hybrid materials based heteropolyacids, silicotungstic acid ͑H 4 SiW 12 O 40 ·nH 2 O͒ or phosphomolybdic acid ͑H 3 PMo 12 O 40 ·nH 2 O͒, and a room temperature ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate ͓͑BMIM͔ ͓BF 4 ͔͒ were synthesized. Carbon analysis showed that 1 mol of ͓SiW 12 O 40 ͔ 4− reacts with 4 mol of ͓BMIM͔ + and 1 mol of ͓PMo 12 O 40 ͔ 3− reacts with 3 mol of ͓BMIM͔ + . Fourier transform infrared spectra showed the presence of both 1-butyl-3-methylimidazolium cations and the Keggin anion. Cyclic voltammetry illustrated that the reduction peak potentials of the Keggin anion in the hybrid materials shift toward negative values. The hybrid materials can be suspended in ultrapure water to form true suspensions. Alternating current electrophoretic deposition was used to obtain thick homogeneous films of the hybrid materials in few minutes over stainless steel ͑SS͒ wires from aqueous suspensions at 30 Supercapacitors, also called ultracapacitors, are electrochemical capacitors that are able to store and deliver a huge amount of energy in a short period of time.1,2 Current research in electrochemical capacitors is focused on the development of new electrode materials.3-5 Three different types of supercapacitors can be found: high surface area carbons, 6 metal oxides, 7-12 and conducting polymers. [13][14][15][16] Novel alternative materials such as hybrid organicinorganic nanocomposites are being considered due to their potential for synergic behavior. In this respect, we can mention a recent report of supercapacitor electrodes based on conducting polymers and metal oxides 17 and conducting polymers and heteropolyacids. 18,19 Heteropolyacids have been applied as electrolyte components in several patents [20][21][22] and as electrolyte in electrochemical supercapacitors.23 Their use as active materials for electrochemical supercapacitors in combination with Ru, conducting polymers, or carbon nanotubes and nanofibers has been recently reported.24-32 On the other hand, ionic liquids have been studied extensively for batteries and fuel cells, [33][34][35][36][37][38] and hybrids of ionic liquid-heteropolyacid based especially on Keggin structures have been reported recently for applications in photochromism, 39 homogeneous catalysis, 40 and as fast proton conductors. 41,42 In this paper, we have investigated the use of ionic liquidheteropolyacid hybrids for applications as supercapacitor electrodes in an environmentally friendly neutral pH electrolyte. The hybrids were synthesized using silicotungstic acid ͑H 4 SiW 12 O 40 ·nH 2 O͒ or phosphomolybdic acid ͑H 3 PMo 12 O 40 ·nH 2 O͒ and the room temperature ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate. The hybrid materials were characterized by Fourier transform infrared ͑FT-IR͒, thermogravimetric analysis ͑TGA͒, and cyclic voltammetry. The performance of the films deposited on stainless steel ͑SS͒ electrodes using alternating current electrophoretic deposition ͑AC-EPD͒ from aqueous suspensions was evaluated for use as supercapaci...

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A route to heat resistant solid membranes with performances of liquid electrolytes

Cited by 147 publications

References 21 publications

Ionic liquid as plasticizer for europium(iii)-doped luminescent poly(methyl methacrylate) films

Ionic liquid as plasticizer for europium(iii)-doped luminescent poly(methyl methacrylate) films

Local Li Cation Coordination and Dynamics in Novel Solid Electrolytes

Ionic Liquid–Heteropolyacid: Synthesis, Characterization, and Supercapacitor Study of Films Deposited by Electrophoresis

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