A high voltage supercapacitor based on ionic liquid with an activated carbon electrode

Pilathottathil, Shabeeba; Thasneema, K K; Thayyil, Mohamed Shahin; Pillai, M. P.; Niveditha, C V

doi:10.1088/2053-1591/aa7116

Cited by 14 publications

(10 citation statements)

References 20 publications

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“…Figure shows cyclic voltammograms of the ionogel with the RGO-based two-electrode system at scan rates of 1, 5, and 10 mV s –1 . The CV profiles at all three scan rates indicate a capacitive behavior of the system. , The absence of any redox peaks at each scan rate further indicates that the charge-storage mechanism of the ionogel-based cell is nonfaradaic or double layer in nature within the potential window. ,, The double-layer capacitive characteristic becomes more prominent at reduced scan rates owing to the absence of the electrolyte starvation effect. At higher scan rates with a shorter time, the charged species fail to undergo complete adsorption at the electrode/electrolyte interface, which results in poorer rate performance of the electrode. ,, Although the existence of functional groups at the surface of the electrode and/or the presence of dissolved impurities may impart some pseudo-capacitance, the linearity of the measured current suggests that the system is predominantly nonfaradaic within this potential range .…”

Section: Resultsmentioning

confidence: 86%

“…The CV profiles at all three scan rates indicate a capacitive behavior of the system. 66,67 The absence of any redox peaks at each scan rate further indicates that the chargestorage mechanism of the ionogel-based cell is nonfaradaic or double layer in nature within the potential window. 62,66,67 The double-layer capacitive characteristic becomes more prominent at reduced scan rates owing to the absence of the electrolyte starvation effect.…”

Section: Resultsmentioning

confidence: 97%

“…66,67 The absence of any redox peaks at each scan rate further indicates that the chargestorage mechanism of the ionogel-based cell is nonfaradaic or double layer in nature within the potential window. 62,66,67 The double-layer capacitive characteristic becomes more prominent at reduced scan rates owing to the absence of the electrolyte starvation effect. At higher scan rates with a shorter time, the charged species fail to undergo complete adsorption at the electrode/electrolyte interface, which results in poorer rate performance of the electrode.…”

Section: Resultsmentioning

confidence: 97%

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Examining the Electrochemical Nature of an Ionogel Based on the Ionic Liquid [P₆₆₆₁₄][TFSI] and TiO₂: Synthesis, Characterization, and Quantum Chemical Calculations

Dutta

Mishra

Kundu

et al. 2022

Ind. Eng. Chem. Res.

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With countries and regions setting strict targets for adopting renewable and sustainable technologies, worldwide demand for energy storage has surged dramatically. Novel materials and new storage chemistry solutions are being explored to realize storage technologies for the next generation. This step-change includes fundamental research in the design of new electrolytes. Ionogels are gaining popularity in electrochemical applications because of their ability to overcome the drawbacks of their liquid counterparts while retaining certain beneficial qualities of the latter. The present study reports the preparation of a novel quasi-solid ionogel through the confinement of the ionic liquid (IL) trihexyltetradecylphosphonium bis(trifluoromethylsulfonyl)imide ([P 66614 ][TFSI]) into a matrix of titania (TiO 2 ) by a simple one-pot sol−gel process. The properties of the ionogel have been studied via field emission scanning electron microscopy (FESEM), rheology, Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), and cyclic voltammetry (CV). The ionogel manifests shear-thinning viscoelastic behavior. The integrity of the IL remains unaffected after its confinement in TiO 2 . Thermal stability analysis shows little mass loss of the ionogel up to a temperature of ∼93 °C, favoring its utilization in hightemperature applications. The ionogel demonstrates a double-layer capacitive behavior with an impressive operating potential window (OPW) of 4 V (−4 to +4 V), substantiating its applicability and excellent stability in the electrochemical domain. The formation of the weakly coordinating ionogel is analyzed using density functional theory (DFT). The electronic structures of the precursors and the ionogel are elucidated at the B3LYP/LANL2DZ level of theory. The quantum chemical (QC) calculations reveal that the interaction of the IL with the cross-linker results in some dimensional changes due to alterations in the vibrational frequencies of the respective groups present in the ionogel system.

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Section: Resultsmentioning

confidence: 86%

Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 97%

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Examining the Electrochemical Nature of an Ionogel Based on the Ionic Liquid [P₆₆₆₁₄][TFSI] and TiO₂: Synthesis, Characterization, and Quantum Chemical Calculations

Dutta

Mishra

Kundu

et al. 2022

Ind. Eng. Chem. Res.

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“…In addition to this, trihexyl (tetradecyl) phosphonium bis (trifluoromethane sulfonyl) imide was utilized as an electrolyte for AC‐based SC by Pilathottathil et al [ 54 ] The authors observed that the as‐synthesized material displayed high ED and specific capacitance of 110 Wh kg −1 and 300 F g −1 , respectively, at a working potential of 3.5 V and showed stability up to 1000 cycles.…”

Section: Ionic Liquids As Electrolytes In Carbon‐based Supercapacitor...mentioning

confidence: 99%

Dual Role is Always Better than Single: Ionic Liquid as a Reaction Media and Electrolyte for Carbon‐Based Materials in Supercapacitor Applications

Sheoran

Kaur

Siwal

et al. 2023

Adv Energy and Sustain Res

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The burgeoning energy demand necessitates the demand for alternative sources of energy worldwide. The development and enhancement of energy storage devices are the main focus of researchers for sustainable energy production. Carbon supercapacitors have the potential applicability as a commercial source of power. Carbon‐based materials have been synthesized by utilization of ionic liquids (ILs). ILs exhibit unique properties, making them valuable materials to be utilized as a precursor, template, reaction media, and electrolytes for forming carbon‐based materials and enhancing supercapacitors (SCs) performance. This review article provides detailed information about ILs in the field of SCs. First, different attractive properties are illustrated, and then the role of ILs in producing carbon‐based materials in the SCs field is described. The next part provides detailed information regarding the utilization of ILs as electrolytes in carbon‐based SCs. Further, the implementations of ILs as electrolytes in different carbon‐based materials (such as activated carbon, graphene carbon nanotubes, and carbon nanofibers) in SCs are listed. Lastly, the importance of IL‐based materials from other materials and future prospects are provided to the readers, which helps further improve the sustainable development of SCs.

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“…The ideal IL will maximize electrochemical stability, thermal stability, ionic conductivity and possess a liquid range to satisfy the engineering application requirements. N ‐butyl‐ N ‐methylpyrrolidinium bis(trifluoromethylsulfonyl)imide ([Pyr 1,4 ][Tf 2 N]) is one of the most commonly researched ILs because it possesses a good balance between these desirable properties and acts as an informal reference against which other ILs can be compared.…”

Section: Physicochemical Properties Of Pc‐based Electrolyte [Pyr14]mentioning

confidence: 99%

Improved Performance of Ionic Liquid Supercapacitors by using Tetracyanoborate Anions

et al. 2018

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Supercapacitors are energy storage devices designed to operate at higher power densities than conventional batteries, but their energy density is still too low for many applications. Efforts are made to design new electrolytes with wider electrochemical windows than aqueous or conventional organic electrolytes in order to increase energy density. Ionic liquids (ILs) with wide electrochemical stability windows are excellent candidates to be employed as supercapacitor electrolytes. ILs containing tetracyanoborate anions [B(CN)4] offer wider electrochemical stability than conventional electrolytes and maintain a high ionic conductivity (6.9 mS cm−1). Herein, we report the use of ILs containing the [B(CN)4] anion for such an application. They presented a high maximum operating voltage of 3.7 V, and two‐electrode devices demonstrate high specific capacitances even when operating at relatively high rates (ca. 20 F g−1 @ 15 A g−1). This supercapacitor stored more energy and operated at a higher power at all rates studied when compared with cells using a commonly studied ILs.

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A high voltage supercapacitor based on ionic liquid with an activated carbon electrode

Cited by 14 publications

References 20 publications

Examining the Electrochemical Nature of an Ionogel Based on the Ionic Liquid [P₆₆₆₁₄][TFSI] and TiO₂: Synthesis, Characterization, and Quantum Chemical Calculations

Examining the Electrochemical Nature of an Ionogel Based on the Ionic Liquid [P₆₆₆₁₄][TFSI] and TiO₂: Synthesis, Characterization, and Quantum Chemical Calculations

Dual Role is Always Better than Single: Ionic Liquid as a Reaction Media and Electrolyte for Carbon‐Based Materials in Supercapacitor Applications

Improved Performance of Ionic Liquid Supercapacitors by using Tetracyanoborate Anions

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A high voltage supercapacitor based on ionic liquid with an activated carbon electrode

Cited by 14 publications

References 20 publications

Examining the Electrochemical Nature of an Ionogel Based on the Ionic Liquid [P66614][TFSI] and TiO2: Synthesis, Characterization, and Quantum Chemical Calculations

Examining the Electrochemical Nature of an Ionogel Based on the Ionic Liquid [P66614][TFSI] and TiO2: Synthesis, Characterization, and Quantum Chemical Calculations

Dual Role is Always Better than Single: Ionic Liquid as a Reaction Media and Electrolyte for Carbon‐Based Materials in Supercapacitor Applications

Improved Performance of Ionic Liquid Supercapacitors by using Tetracyanoborate Anions

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Product

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Examining the Electrochemical Nature of an Ionogel Based on the Ionic Liquid [P₆₆₆₁₄][TFSI] and TiO₂: Synthesis, Characterization, and Quantum Chemical Calculations

Examining the Electrochemical Nature of an Ionogel Based on the Ionic Liquid [P₆₆₆₁₄][TFSI] and TiO₂: Synthesis, Characterization, and Quantum Chemical Calculations