Activation of an ionic liquid electrolyte for electric double layer capacitors by addition of BaTiO3 to carbon electrodes

Nagao, Yasutaka; Nakayama, Yuhei; Oda, Hirokazu; Ishikawa, Masashi

doi:10.1016/j.jpowsour.2007.01.068

Cited by 18 publications

(9 citation statements)

References 18 publications

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“…They concluded that 4 M EMIMBF 4 /AN achieved the highest capacitance, and pure ILs achieved the highest energy density. Nagao et al proposed BaTiO 3 additive, which could boost the capacitance of electrodes and enhanced the rate capability of EDLCs with EMIMBF 4 electrolytes (Nagao et al, 2007). Compared with EDLCs without BaTiO 3 , EDLCs employing BaTiO 3 powder/activated carbon composite as electrodes and the EMIMBF 4 as electrolytes delivered larger capacitance and better rate performance.…”

Section: Improvements Of Il Electrolytesmentioning

confidence: 99%

Recognition of Ionic Liquids as High-Voltage Electrolytes for Supercapacitors

et al. 2020

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The electrochemical stability of electrolytes is essential to the working potential of supercapacitors. Ionic liquids (ILs) are being considered as safe alternatives to current organic electrolytes and attracting extensive interests owing to their inflammability, widened potential windows, and superior ionic conductivity. Novel supercapacitors with IL electrolytes exhibit attractive energy density and can be utilized in various energy storage systems. Most previous studies focused on electrochemical performances, while rare attentions were devoted to energy storage process details or mechanisms. This review comprehensively summarizes the latest progress on formulated IL electrolytes for different types of supercapacitors, with an emphasis on the intrinsic understanding of the related energy storage mechanisms. Subsequently, comparisons of various IL-based liquid-state electrolytes as well as the state-of-the-art advancements in optimizing ILs electrolytes are introduced. The authors attempt to reveal the inherent correlation between the usage of IL electrolytes and the properties of supercapacitors via referenced works. Some emerging applications of ionogel electrolytes based on conventional polymers and poly(IL)s for flexible supercapacitors are also presented, including the existing problems. In addition, challenges and future perspectives of research in this field are highlighted.

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Section: Improvements Of Il Electrolytesmentioning

confidence: 99%

Recognition of Ionic Liquids as High-Voltage Electrolytes for Supercapacitors

et al. 2020

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“…1,2 Current research fields are divided into three categories: (a) as neoteric solvents as environmentally benign reaction media, 3,4 (b) as catalysts for organic reactions, [5][6][7] (c) and as electrolyte solutions for lithium battery applications, 8,9 fuel cells, 10,11 solar cells, 12,13 and capacitors. 14,15 SO 3 H-functionalized ionic liquids offer a new possibility for developing environmentally friendly acid catalysts because they combine the advantages of liquid acids and solid acids, uniform acid sites, water and air stable, easily separated, and reusable. Davis and co-workers observed temperature-controlled liquidsolid separation by using an alkane sulfonic acid IL as solvent/ catalyst for esterification.…”

Section: Introductionmentioning

confidence: 99%

“…Ionic liquids (ILs) have been revealed as green reaction media owing to their negligible volatility, excellent thermal stability, remarkable solubility, the variety of structures available, liquidity over a wide temperature range, and high inherent conductivities. , Current research fields are divided into three categories: (a) as neoteric solvents as environmentally benign reaction media, , (b) as catalysts for organic reactions, − (c) and as electrolyte solutions for lithium battery applications, , fuel cells, , solar cells, , and capacitors. , …”

Section: Introductionmentioning

confidence: 99%

Heat Capacity and Thermodynamic Properties of Sulfonate-Containing Zwitterions

et al. 2010

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Two sulfonate-containing zwitterions, 1-methylimidazolium-3-propylsulfonate zwitterion (MimC 3 SO 3 , C 7 H 12 N 2 O 3 S; CAS 179863-07-1) and 1-methylimidazolium-3-butylsulfonate zwitterion (MimC 4 SO 3 , C 8 H 14 N 2 O 3 S; CAS 148019-49-2), were prepared, and the structures were characterized by 1 H NMR and 13 C NMR and ESI-MS. The thermodynamic properties are investigated through adiabatic caloremetry (AC), differential scanning calorimetry (DSC), and thermogravimetric (TG) analysis. The low-temperature heat capacity (C p,m ) of MimC 3 SO 3 and MimC 4 SO 3 was measured in the temperature range from (78 to 400) K with a high precision automated calorimeter. The thermodynamic functions [H T -H 298.15 ] and [S T -S 298.15 ] were calculated based on the heat capacity data in the range from (80 to 400) K with an interval of 5 K.

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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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Activation of an ionic liquid electrolyte for electric double layer capacitors by addition of BaTiO3 to carbon electrodes

Cited by 18 publications

References 18 publications

Recognition of Ionic Liquids as High-Voltage Electrolytes for Supercapacitors

Recognition of Ionic Liquids as High-Voltage Electrolytes for Supercapacitors

Heat Capacity and Thermodynamic Properties of Sulfonate-Containing Zwitterions

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

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