Why electrochemical capacitor electrolytes should not be ignored?

Azmi, Sara; Klimek, Amelia; Frąckowiak, Elżbieta

doi:10.1016/j.electacta.2023.142347

Cited by 16 publications

(7 citation statements)

References 123 publications

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“…The ions of the solute salt play a direct role in forming the electric double layer, so the selection of solute salts is crucial for developing advanced EDLCs [97,98]. Encouragingly, it is of practical significance to study the IL-solvent electrolyte additives that can improve the operating voltage for improving energy density.…”

Section: The Use Of Solute Salt Additives For High Voltagementioning

confidence: 99%

Tuning of Ionic Liquid–Solvent Electrolytes for High-Voltage Electrochemical Double Layer Capacitors: A Review

Wang,

Xue,

Yan

et al. 2024

Batteries

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Electrochemical double-layer capacitors (EDLCs) possess extremely high-power density and a long cycle lifespan, but they have been long constrained by a low energy density. Since the electrochemical stability of electrolytes is essential to the operating voltage of EDLCs, and thus to their energy density, the tuning of electrolyte components towards a high-voltage window has been a research focus for a long time. Organic electrolytes based on ionic liquids (ILs) are recognized as the most commercially promising owing to their moderate operating voltage and excellent conductivity. Despite impressive progress, the working voltage of IL–solvent electrolytes needs to be improved to meet the growing demand. In this review, the recent progress in the tuning of IL- based organic electrolyte components for higher-voltage EDLCs is comprehensively summarized and the advantages and limitations of these innovative components are outlined. Furthermore, future trends of IL–solvent electrolytes in this field are highlighted.

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Section: The Use Of Solute Salt Additives For High Voltagementioning

confidence: 99%

Tuning of Ionic Liquid–Solvent Electrolytes for High-Voltage Electrochemical Double Layer Capacitors: A Review

Wang,

Xue,

Yan

et al. 2024

Batteries

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“…In this sense, the aqueous-based electrochemical capacitor presents an excellent system, competitive to the organic one, that is also safe, green, and affordable. 26 Among the first water-based electrolytes utilized in ECs were KOH and H 2 SO 4 . However, such electrolytes cannot be considered for commercial application due to their narrow voltage window ( ca.…”

Section: Introductionmentioning

confidence: 99%

Effect of a buffer/iodide electrolyte on the performance of electrochemical capacitors

Klimek,

Tobis,

Frackowiak

2024

Green Chem.

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“…However, the principal drawback of AHSCs is moderate energy density due to the narrow potential window of aqueous electrolytes (1. development of aqueous supercapacitors with high energy density. 6 The stable voltage window of AHSCs is governed by the stability window of the electrolyte, overpotentials of the anode and cathode, and native activation barriers. 9 Another setback is high self-discharge (4% per day), which impedes the usage of AHSCs in a stand-alone application or in tandem with a battery.…”

Section: Introductionmentioning

confidence: 99%

FeS₂@Ti₃C₂T_x Pseudocapacitive Anode for Supercapacitors: Effect of Counter-Electrode Electrochemical Behavior on Supercapacitor Metrics

Garlapati,

Naskar,

Martha

et al. 2024

ACS Appl. Energy Mater.

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Understanding the impact of electroactive material charge storage behavior on the supercapacitor performance is important to mitigate the multifaceted issues of supercapacitors. Aqueous hybrid supercapacitors (AHSCs) employ an energy-dense and another power-dense electrode to balance energy and power. Herein, two AHSC device architectures using a pseudocapacitive FeS 2 @Ti 3 C 2 T x anode in both a capacitive high-surface-area carbon (HSAC) in one and a pseudocapacitive VO 2 in another are rationally studied. The growth of FeS 2 on metallic MXenes (FeS 2 @Ti 3 C 2 T x ) improves its capacitance from 285 to 437 F g −1 in a stable potential window of 0 to −0.8 V. FeS 2 @Ti 3 C 2 T x ||VO 2 demonstrates a wider voltage window (1.8 V) and higher energy density (29.2 Wh kg −1 ) than FeS 2 @Ti 3 C 2 T x ||HSAC, owing to the higher oxygen evolution reaction onset potential of the VO 2 (0.9 V) than the HSAC (0.65 V), whereas FeS 2 @Ti 3 C 2 T x ||HSAC demonstrates a higher power density owing to the power-dense HSAC. FeS 2 @Ti 3 C 2 T x ||VO 2 delivers a higher self-discharge voltage of 1.27 V and a lower leakage current than FeS 2 @Ti 3 C 2 T x ||HSAC, originating from all pseudocapacitive electrodes and demonstrating the benefits of all pseudocapacitive-based AHSCs.

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Why electrochemical capacitor electrolytes should not be ignored?

Cited by 16 publications

References 123 publications

Tuning of Ionic Liquid–Solvent Electrolytes for High-Voltage Electrochemical Double Layer Capacitors: A Review

Tuning of Ionic Liquid–Solvent Electrolytes for High-Voltage Electrochemical Double Layer Capacitors: A Review

Effect of a buffer/iodide electrolyte on the performance of electrochemical capacitors

FeS₂@Ti₃C₂T_x Pseudocapacitive Anode for Supercapacitors: Effect of Counter-Electrode Electrochemical Behavior on Supercapacitor Metrics

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Why electrochemical capacitor electrolytes should not be ignored?

Cited by 16 publications

References 123 publications

Tuning of Ionic Liquid–Solvent Electrolytes for High-Voltage Electrochemical Double Layer Capacitors: A Review

Tuning of Ionic Liquid–Solvent Electrolytes for High-Voltage Electrochemical Double Layer Capacitors: A Review

Effect of a buffer/iodide electrolyte on the performance of electrochemical capacitors

FeS2@Ti3C2Tx Pseudocapacitive Anode for Supercapacitors: Effect of Counter-Electrode Electrochemical Behavior on Supercapacitor Metrics

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Product

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FeS₂@Ti₃C₂T_x Pseudocapacitive Anode for Supercapacitors: Effect of Counter-Electrode Electrochemical Behavior on Supercapacitor Metrics