Solvent-free double-layer capacitors with polymer electrolytes based on 1-ethyl-3-methyl- imidazolium triflate ionic liquid

Lewandowski, Andrzej; Świderska, Aleksandra

doi:10.1007/s00339-005-3396-9

Cited by 45 publications

(21 citation statements)

References 22 publications

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“…Electrolytes based on organic solvents [7][8][9][10][11]13,15] have wider electrochemical windows, but lower conductivities. Recently, application of low-temperature ionic liquids [16,17] as electrolytes for electrochemical capacitors (often as components of gel electrolytes) was considered. Low-temperature ionic liquids combine low vapor pressure, thus inflammability, and low toxicity with a relatively wide electrochemical window.…”

Section: Introductionmentioning

confidence: 99%

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New ceramic–carbon composites for electrodes for electrochemical capacitors

Kosmulski

Skubiszewska–Zięba

Лебода

et al. 2007

Journal of Colloid and Interface Science

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Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. It combines electric conductivity with a high specific surface area.…”

Section: Introductionmentioning

confidence: 99%

New ceramic–carbon composites for electrodes for electrochemical capacitors

Kosmulski

Skubiszewska–Zięba

Лебода

et al. 2007

Journal of Colloid and Interface Science

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“…These problems encourage investigations devoted to the development of non-aqueous electrolytes with high conductivity [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. The key characteristics of ionic liquids are high decomposition voltage limits, wide ranges of operational temperatures, high ionic conductivities, non-corrosive nature [2], and making them attractive alternatives to water.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical behavior of aluminum in 1-n-butyl-3-methylimidazolium tetrafluoroborate ionic liquid electrolytes for capacitor applications

Trombetta

Souza

et al. 2009

J Appl Electrochem

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This study compares two series of solvents for application in aluminum electrolytic capacitors: ethylene glycol (EG) and water mixtures, and ethylene glycol and 1-n-butyl-3-methylimidazolium tetrafluoroborate (BMI.BF 4 ) ionic liquid (IL) mixtures. Electrochemical impedance spectroscopy and cyclic voltammetry were carried out with a previously anodized aluminum disk electrode. Comparative measurements of solution resistance, polarization resistance, AC capacitance, and passive current were made. The results show that EG-IL mixtures with low amounts of IL (10% IL-90% EG v/v) have a low solution resistance. Low values of solution resistance, high values of polarization resistance, small passive current, and uniform capacitance of anodized aluminum in EG-IL mixtures are favorable properties of the BMI.BF 4 IL for use as an electrolyte in the construction of electrolytic aluminum capacitors.

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“…For example, Lewandowski and Świderska reported that ILcontaining gel-type electrolytes based on synthetic polymers, such as poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP), showed relatively high ionic conductivity and the corresponding EDLC cells exhibited long-term cycle performance. 12 Recently, we proposed a chitosan-based gel electrolyte with IL (Chi/IL gel electrolyte) as a non-aqueous electrolyte for EDLCs. 13 Chitosan is a heteropolymer consisting of D-glucosamine and a small fraction of N-acetyl-D-glucosamine residues, and is also a typical polysaccharide derived from chitin found in the cells of crustaceans, the exoskeletons of insects, and the cell walls of fungi.…”

Section: Introductionmentioning

confidence: 99%

Application of Chitosan-based Gel Electrolytes with Ionic Liquids for High-Performance and Safe Electric Double Layer Capacitors

et al. 2013

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Chitosan-based gel electrolytes with ionic liquids (Chi/IL) were prepared and investigated for use in electric doublelayer capacitors (EDLCs). The voltage drop for the test cell with Chi/EMImBF 4 (EMImBF 4 = 1-ethyl-3-methylimidazolium tetrafluoroborate) or Chi/DEMEBF 4 (DEMEBF 4 = N,N-diethyl-N-methyl-N-2-methoxyethylammonium tetrafluoroborate) and activated carbon fiber cloth electrodes (ACFCs) was smaller than that with the corresponding ionic liquid electrolyte. To clarify the effect of the presence of Chi in contact with the carbon electrode, we also prepared the Chi-containing ACFC electrode (Chi+ACFC) and evaluated its charge-discharge characteristics in EMImBF 4 . The results proved that the presence of Chi on the active materials reduces the internal resistances of the cell and plays an important role in the improvement of the EDLC performance. In addition, the high-voltage operation of the test cells with Chi-based gel electrolytes was investigated. These results suggest that the Chi is suitable for use in practical high-performance and safe EDLCs.

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Solvent-free double-layer capacitors with polymer electrolytes based on 1-ethyl-3-methyl- imidazolium triflate ionic liquid

Cited by 45 publications

References 22 publications

New ceramic–carbon composites for electrodes for electrochemical capacitors

New ceramic–carbon composites for electrodes for electrochemical capacitors

Electrochemical behavior of aluminum in 1-n-butyl-3-methylimidazolium tetrafluoroborate ionic liquid electrolytes for capacitor applications

Application of Chitosan-based Gel Electrolytes with Ionic Liquids for High-Performance and Safe Electric Double Layer Capacitors

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