Enhanced electrochemical performance of Ti3C2T  MXene film based supercapacitors in H2SO4/KI redox additive electrolyte

Fu, Jianjian; Li, Lei; Lee, Damin; Yun, Je Moon; Ryu, Bong Ki; Kim, Kwang Ho

doi:10.1016/j.apsusc.2019.144250

Cited by 48 publications

(18 citation statements)

References 59 publications

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“…36,119,120 Shao et al used a unique technique called multiple potential step chronoamperometry (MUSCA) to understand the kinetics of pseudocapacitive nature of Ti 3 C 2 T x MXenes in acidic as well as alkaline electrolyte. 121 The sum of the outer/surface process (faradaic or nonfaradaic redox reaction) and the inner/bulk processes (intercalation reaction into the bulk phase) is the total charge stored. For both alkaline and acidic electrolyte, the bulk process dominates over low scan rates and the surface process dominated over high scan rates 121 (Figure 17).…”

Section: Influence Of Electrolytes On the Energy Storage Mechanismmentioning

confidence: 99%

“…121 The sum of the outer/surface process (faradaic or nonfaradaic redox reaction) and the inner/bulk processes (intercalation reaction into the bulk phase) is the total charge stored. For both alkaline and acidic electrolyte, the bulk process dominates over low scan rates and the surface process dominated over high scan rates 121 (Figure 17).…”

Section: Influence Of Electrolytes On the Energy Storage Mechanismmentioning

confidence: 99%

“…46 They obtained a specific capacitance of 487, 225, and 184 F/g in 1 M H 2 SO 4 , 1 M MgSO 4 , and 1 M KOH, respectively at 2 mV/s. Smaller 121 Copyright (2021), with permission from Elsevier cation (H + ) having acidic electrolyte shows higher capacitance than divalent Mg 2+ ion having the neutral electrolyte and larger K + ion having basic electrolyte. 46 Similarly, due to the pseudo-intercalation charge storage mechanism, capacitance ranges from 45 F/g, and 135 F/g obtained in neutral and basic electrolytes for Ti 3 C 2 electrode.…”

Section: Influence Of Electrolytes On the Energy Storage Mechanismmentioning

confidence: 99%

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Review on MXene synthesis, properties, and recent research exploring electrode architecture for supercapacitor applications

et al. 2021

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MXenes have potential applications in the field of supercapacitors. As a twodimensional material, how its structure, properties, and surface chemistry facilitate energy storage is discussed. A detailed analysis of the synthesis of MXenes and factors affecting energy storage in supercapacitor grounds is explained in detail. Possibilities of anode architecture to improve supercapacitor performance on industrial standards are discussed. This review will aid in planning better MXene hybrid anodes to assemble supercapacitors with desired electrochemical performance. Ways to improve capacitance, energy density, and voltage window of electrodes are explained based on literature reports. Electrochemical performance is evaluated by the effect of hierarchical structures, heterostructures, transition metal oxides, carbon compounds, polymers, and so on. Anode fabrication methods for modern micro-supercapacitors are also incorporated in this study. A good selection of electrolytes and fabrication techniques adapted for MXene-based anode fabrication is emphasized. This review will help in future options of supercapacitor anode designing.

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Section: Influence Of Electrolytes On the Energy Storage Mechanismmentioning

confidence: 99%

Section: Influence Of Electrolytes On the Energy Storage Mechanismmentioning

confidence: 99%

Section: Influence Of Electrolytes On the Energy Storage Mechanismmentioning

confidence: 99%

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Review on MXene synthesis, properties, and recent research exploring electrode architecture for supercapacitor applications

et al. 2021

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“…[14][15] An enhanced capacitance has also been observed using this configuration. [16][17][18] Krüner et al [19] pyrolyzed and activated phenolic resin beads with ammonia to obtain nitrogen-containing high-permeability carbon beads. [19] When applied as supercapacitor electrode, a specific capacitance as high as 173 F g À 1 was obtained.…”

Section: Introductionmentioning

confidence: 99%

Novel Electrode Materials and Redox‐Active Electrolyte for High‐Performance Supercapacitor

Zhang

Kong

et al. 2022

ChemElectroChem

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Heteroatom doping has been increasingly applied to enhance the electrochemical performance of carbon materials when used as supercapacitor electrodes. However, the use of doped electrode by itself often does not provide sufficiently high performance for aqueous-based supercapacitor. Here, a highperformance supercapacitor was developed, using nitrogendoped microporous carbon spheres-based materials and a redox-active electrolyte as electrodes and electrolyte, respectively. The doped electrode, which was produced via template and self-assembly routes, exhibited a well-developed microporous structure, large specific surface area, and abundant heteroatoms. The combination of the heteroatom-doped electrode and KI-H 2 SO 4 electrolyte in supercapacitor substantially increased the specific capacitance, from 230 F g À 1 to 532 mAh g À 1 . Such a large enhancement was attributed to the addition of KI as a redox mediator in the aqueous electrolyte. The NCS-800 supercapacitor has a specific capacity as high as 68 mAh g À 1 (at a 1 A g À 1 current density) in KI-H 2 SO 4 electrolyte. It could retain 57 % of capacitance even after maintaining a constant voltage of 1 V for 5 hours, highlighting its good electrochemical performance of NCS-800 as a supercapacitor electrode material.

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“…Redox-mediator electrolytes have reversible redox peaks and will contribute additional pseudocapacitance to the whole SCs with the electrodes. [16][17][18][19] Matching the electrodes and redox electrolytes is a recent initiative to improve the overall capacitance of SCs. A matched combination of electrodes and redox electrolytes should have two characteristics: redox potential overlap and chemical interaction between electrodes and electrolytes.…”

Section: Introductionmentioning

confidence: 99%

Proton-Conducting Polyoxometalates as Redox Electrolytes Synergistically Boosting the Performance of Self-Healing Solid-State Supercapacitors with Polyaniline

Cheng

Sun

et al. 2021

CCS Chem

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Energy storage devices with high volumetric and gravimetric capacitance are in urgent demand due to the booming market of portable and wearable electronics. Using redox-active molecules as electrolytes is a strategy to improve the capacitance and energy density of solid-state supercapacitors (SCs). In this study, polyoxometalates (POMs) are applied as proton conductors and redox mediators in polyvinyl alcohol (PVA) electrolytes, which increase the capacitance of obtained SCs with polyaniline (PANI). H 3 PMo 12 O 40 -loaded PANI electrodes provide pseudocapacitance with an eight-electron Faraday reaction in a charge-discharge cycle. This has rarely been reported in SCs before. The largest capacitance of SCs with H 3 PMo 12 O 40 and H 3 PW 12 O 40 as electrolytes is 7.69 F/cm 2 (3840 F/g) based on a single electrode at 0.5 mA/cm 2 . In addition, POM electrolytes exhibit excellent self-healing ability, which is attributed to the rich hydrogen-bonding network between POMs and PVA. This study demonstrates that the capacitance of solid-state SCs is improved by using molecular redox-active electrolytes and showcases the potential of applying this strategy to other energy storage devices in the future.

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Enhanced electrochemical performance of Ti3C2T MXene film based supercapacitors in H2SO4/KI redox additive electrolyte

Cited by 48 publications

References 59 publications

Review on MXene synthesis, properties, and recent research exploring electrode architecture for supercapacitor applications

Review on MXene synthesis, properties, and recent research exploring electrode architecture for supercapacitor applications

Novel Electrode Materials and Redox‐Active Electrolyte for High‐Performance Supercapacitor

Proton-Conducting Polyoxometalates as Redox Electrolytes Synergistically Boosting the Performance of Self-Healing Solid-State Supercapacitors with Polyaniline

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