Characteristics of Electric Double Layer Capacitors with an Ionic Liquid Electrolyte Containing Li Ion

Murayama, Ichiro; Yoshimoto, Nobuko; Egashira, Makoto; Morita, Masayuki; Kobayashi, Y.; Ishikawa, Masashi

doi:10.5796/electrochemistry.73.600

Cited by 31 publications

(17 citation statements)

References 6 publications

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“…17). 260,261 Other imidazolium-based cations besides [EMIM] + , such as 1-butyl-2,3-dimethylimidazolium bis(trifluoromethylsulfonyl)imide ([BDMIM]), 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([BMIM]), and 1-dodecyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([C 12 MIM]), have also been studied. In addition to changing the anion of [EMIM]-based IL electrolytes, other methods have also been proposed to improve the properties (e.g., ESPW and ionic conductivity).…”

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confidence: 99%

“…In addition to changing the anion of [EMIM]-based IL electrolytes, other methods have also been proposed to improve the properties (e.g., ESPW and ionic conductivity). [259][260][261] For example, Kong et al 259 reported that the addition of small amounts of single walled CNTs (e.g., 0.1 and 0.5 wt%) into the [EMIM][BF 4 ] IL electrolyte could increase the ionic conductivity of the electrolyte. As a result, the specific capacitance, energy density and cycling stability of EDLCs with this CNT-added IL electrolyte were all Some studies showed that the addition of Li salt into the IL electrolyte could negatively shift the cathodic potential limit for increasing the cathodic stability.…”

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“…As a result, the specific capacitance, energy density and cycling stability of EDLCs with this CNT-added IL electrolyte were all Some studies showed that the addition of Li salt into the IL electrolyte could negatively shift the cathodic potential limit for increasing the cathodic stability. 260,261 Other imidazolium-based cations besides [EMIM] + , such as 1-butyl-2,3-dimethylimidazolium bis(trifluoromethylsulfonyl)imide ([BDMIM]), 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([BMIM]), and 1-dodecyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([C 12 MIM]), have also been studied. 262,263 For instance, Bettini et al 263 ILs with other cations (e.g., pyrrolidinium-based, 264-266 ammonium-based, [267][268][269] sulfonium-based, 270 and fluorohydrogenate ILs 269 ) have also been extensively studied as potential electrolytes for EDLCs.…”

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A review of electrolyte materials and compositions for electrochemical supercapacitors

et al. 2015

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Electrolytes have been identified as some of the most influential components in the performance of electrochemical supercapacitors (ESs), which include: electrical double-layer capacitors, pseudocapacitors and hybrid supercapacitors. This paper reviews recent progress in the research and development of ES electrolytes. The electrolytes are classified into several categories, including: aqueous, organic, ionic liquids, solid-state or quasi-solid-state, as well as redox-active electrolytes. Effects of electrolyte properties on ES performance are discussed in detail. The principles and methods of designing and optimizing electrolytes for ES performance and application are highlighted through a comprehensive analysis of the literature. Interaction among the electrolytes, electro-active materials and inactive components (current collectors, binders, and separators) is discussed. The challenges in producing high-performing electrolytes are analyzed. Several possible research directions to overcome these challenges are proposed for future efforts, with the main aim of improving ESs' energy density without sacrificing existing advantages (e.g., a high power density and a long cycle-life) (507 references).

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A review of electrolyte materials and compositions for electrochemical supercapacitors

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“…From such a viewpoint, the influence of the coexistence of lithium and tetraalkylammonium salts in non-aqueous electrolyte for electric double layer properties is also attractive. There are only some special studies in which non-aqueous electrolytes containing lithium ion has been proposed [17][18][19][20].…”

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Capacitance of porous carbon electrode in mixed salt non-aqueous electrolytes

Egashira

Sawada

Ueda

et al. 2010

Journal of Power Sources

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“…Recently, there have been reports demonstrating that an EDLC with a Li + -containing IL provides increased doublelayer capacitance and especially enhanced electrochemical stability compared to pure IL without Li salt (Murayama et al, 2005). These studies revealed that the cathodic potential limit can shift favorably in a more negative direction after the addition of Li salt in the IL because the "inhibiting effect" induced by Li + prevents the reduction of cations in IL (Matsumoto et al, 2003;Fukuda et al, 2007).…”

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Electrochemical Double-Layer Capacitor Containing Mixtures of Ionic Liquid, Lithium Salt, and Organic Solvent as an Electrolyte

Li¹,

Li²,

Feng

et al. 2021

Front. Mater.

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A modified ionic liquid (IL)-based electrolyte, with conventional carbonates as the support solvent and lithium salt as the additive, was designed for a high-voltage electrochemical double-layer capacitor (EDLC). It is found that the employment of carbonate solvents enhances the ionic conductivity and decreases the viscosity of the electrolyte. At the same time, the addition of lithium salt plays a key role in the stabilization of the operating potential window and the modification of the passivation layer on the electrode. As a result, increased specific capacitance, improved cycle stability, and rate capability are demonstrated in the EDLC with an EMI-BF4/LiPF6/PC/DMC electrolyte at the upper voltage of 3 V, in contrast to that with pure IL and IL/carbonate mixture. This study primarily stresses the combination effect of Li salt and organic solvent in an IL electrolyte system for constructing advanced 3 V-class EDLC with excellent overall performance.

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Characteristics of Electric Double Layer Capacitors with an Ionic Liquid Electrolyte Containing Li Ion

Cited by 31 publications

References 6 publications

A review of electrolyte materials and compositions for electrochemical supercapacitors

A review of electrolyte materials and compositions for electrochemical supercapacitors

Capacitance of porous carbon electrode in mixed salt non-aqueous electrolytes

Electrochemical Double-Layer Capacitor Containing Mixtures of Ionic Liquid, Lithium Salt, and Organic Solvent as an Electrolyte

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