Redox-active electrolyte supercapacitors using electroactive ionic liquids

Xie, Han Jin; Gélinas, Bruno; Rochefort, Dominic

doi:10.1016/j.elecom.2016.02.019

Cited by 92 publications

(51 citation statements)

References 19 publications

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“…379 However, because of their high diffusivity of ions in aqueous electrolytes, the self-discharge remains a great issue. 380 A new concept proposed by Rochefort's 381 and Fontaine's group 382 uses a biredox ionic liquid as salt in an electrolyte to achieve bulk-like redox density with liquid-like fast kinetics. The cation and anion of these biredox ionic liquids bear moieties that undergo very fast reversible redox reactions.…”

Section: Advanced Electrolytesmentioning

confidence: 99%

Nanoporous carbon for electrochemical capacitive energy storage

et al. 2020

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Section: Advanced Electrolytesmentioning

confidence: 99%

Nanoporous carbon for electrochemical capacitive energy storage

et al. 2020

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“…Xie et al [232] investigated redox-active IL as electrolyte for SC applications where the IL was utilized with ferrocene as an electroactive material to enhance the energy density, which led to high concentrations of redox moieties in the electrolyte (2.5 M) and a wide working potential, around 2.5 V. Lin et al [233] achieved a highest specific capacitance of 130 F g −1 (63 mA h g −1 ) at −20 • C, 100 F g −1 (49 mA h g −1 ) at −30 • C and 175 F g −1 (85 mA h g −1 ) at 80 • C for fabricated SC using an eutectic mixture of Pip 23 TFSI and PYR 24 TFSI IL electrolyte with graphene film. Tsai et al [188] employed a eutectic mixture of ILs, such as Pip 13 FSI and PYR 14 FSI, as an electrolyte with exfoliated graphite oxide electrodes, which reached 180 F g −1 in the voltage window of 3.5 V at 20 mV s −1 .…”

Section: Ionic Liquidsmentioning

confidence: 99%

Ionic Liquid-Based Electrolytes for Energy Storage Devices: A Brief Review on Their Limits and Applications

et al. 2020

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Since the ability of ionic liquid (IL) was demonstrated to act as a solvent or an electrolyte, IL-based electrolytes have been widely used as a potential candidate for renewable energy storage devices, like lithium ion batteries (LIBs) and supercapacitors (SCs). In this review, we aimed to present the state-of-the-art of IL-based electrolytes electrochemical, cycling, and physicochemical properties, which are crucial for LIBs and SCs. ILs can also be regarded as designer solvents to replace the more flammable organic carbonates and improve the green credentials and performance of energy storage devices, especially LIBs and SCs. This review affords an outline of the progress of ILs in energy-related applications and provides essential ideas on the emerging challenges and openings that may motivate the scientific communities to move towards IL-based energy devices. Finally, the challenges in design of the new type of ILs structures for energy and environmental applications are also highlighted.Polymers 2020, 12, 918 2 of 37 and structural stability of the ionic species are extremely crucial and responsible for the efficient outputs in energy storage devices. In the light of this fact, high current (i.e., automotive applications) operating devices are required to have storage devices that have higher power density and faster ion transport properties. Previous studies have suggested that one of the most favorable approaches to simultaneously progress the safety, along with energy and power densities, is the incorporation of ILs into the electrolyte system [11].In past decades, room temperature ionic liquids (RTILs) have been acknowledged with noteworthy attention due to their excellent miscellaneous properties, such as thermal and chemical stability, tunable structure over the wide range of operating temperature, a broad electrochemical stability window, high ionic conductivity in the range of 10 −3 -10 −2 S cm −1 at room temperature, and non-flammability as a potential candidate for EES devices, such as LIBs [12], electric double-layer SCs [13][14][15], proton exchange membrane fuel cells, and solar cells [16][17][18][19]. Using ILs as an alternative to organic electrolytes has the advantage of improving the ions' mobility, as well as eliminating the hazards associated within the organic electrolytes. Additionally, ILs often have comparable zero or negligible vapor pressure at normal temperatures due to their high thermal stability. Because of the above statements, ILs are widely used as solvents or electrolytes for energy storage applications in recent times [7,18,[20][21][22][23][24][25][26][27].Typically, ILs are organic salts, also defined as molten salts, which have a lower melting point (<100 • C) with a wide degree of variation. Moreover, they are comprised of organic cations, such as an pyridinium (PY) [28], imidazolium (Im) [29][30][31][32], pyrrolidinium (PYR) [33][34][35][36], ammonium [37], and sulfonium [38], derivatives joined inorganic or organic anions, such as BF 4 − [39,40], PF 6 − [30], triflate (...

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“…Likewise, the specific energy in the composite electrolyte increased at three operating voltages (2, 3, and 3.5 V) compared to pure PYR14TFSI electrolyte (Figure d). Similarly, Xie et al used ferrocene‐modified imidazolium cation or bis(trifluoromethanesulfonyl)imide anion as electrolyte in SCs . The authors noticed a considerable increase (≈80%) in energy density (13.2 Wh kg −1 ) compared to nonfunctionalized IL.…”

Section: Redox Ilsmentioning

confidence: 99%

Ionic Liquids as Environmentally Benign Electrolytes for High‐Performance Supercapacitors

et al. 2018

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Electrochemical capacitors (ECs) are a vital class of electrical energy storage (EES) devices that display the capacity of rapid charging and provide high power density. In the current era, interest in using ionic liquids (ILs) in high‐performance EES devices has grown exponentially, as this novel versatile electrolyte media is associated with high thermal stability, excellent ionic conductivity, and the capability to withstand high voltages without undergoing decomposition. ILs are therefore potentially useful materials for improving the energy/power performances of ECs without compromising on safety, cyclic stability, and power density. The current review article underscores the importance of ILs as sustainable and high‐performance electrolytes for electrochemical capacitors.

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Redox-active electrolyte supercapacitors using electroactive ionic liquids

Cited by 92 publications

References 19 publications

Nanoporous carbon for electrochemical capacitive energy storage

Nanoporous carbon for electrochemical capacitive energy storage

Ionic Liquid-Based Electrolytes for Energy Storage Devices: A Brief Review on Their Limits and Applications

Ionic Liquids as Environmentally Benign Electrolytes for High‐Performance Supercapacitors

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