Ionic liquid etched and microwave-assisted delaminated MXene as an excellent electrocatalyst for the hysteretic negative reaction of vanadium redox flow batteries

Jing, Minghua; Li, Xi; Yu, Hao; An, Xinyu; Liu, Zhuling; Zhang, Ang; Qin, Xindong; Li, Chao; Fang, Dawei

doi:10.1016/j.cej.2022.140789

Cited by 13 publications

(12 citation statements)

References 55 publications

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“…The results clearly demonstrate that a significantly better capacity retention can be achieved with a NH 4 HF 2 -etched MXene modified negative electrode. Previous work [40] has shown that MXene particles prepared by drop casting and vacuum drying at 50 °C remain attached to the carbon fibers of the electrode after VRFB cycling. The cycling behavior observed in this study confirms that this method is sufficient for ensuring stability of the MXene particles.…”

Section: Vrfb Flow-cell Performancementioning

confidence: 96%

“…For pristine carbon paper, no oxidation or reduction peaks were observed (Figure 4a), while the thermal treated and MXene modified electrodes improved the V 2 + /V 3 + redox reaction kinetics, consistent with previous studies. [6,14,40,41] The NH 4 HF 2 -etched MXene modified electrode demonstrated the highest kinetics for the V 2 + /V 3 + redox reaction based on the peak separation and peak current followed by HF-etched MXene modified and thermal treated electrodes. A peak separation (ΔE p ) of 152 mV, 132 mV, and 107 mV was recorded for the thermal treated, HF-etched MXene modified, and NH 4 HF 2 -etched MXene modified electrode, respectively.…”

Section: Mxene Modified Electrode Characterizationmentioning

confidence: 97%

“…It was found that at a current density of 200 mA cm À 2 , the charge-discharge energy efficiency was increased by 15.7 % compared to a pristine (untreated) graphite felt electrode, while exhibiting stable cycling. [14] Jing et al [40] explored the effect of ionic liquid etched and microwave-assisted delaminated MXene as an electrocatalyst on the carbon fiber for the VRFB application. They achieved 7.53 % higher energy efficiency compared to the pristine carbon fiber at a current density of 200 mA cm À 2 and the discharging capacity was found to decrease by around 0.12 % per cycle.…”

Section: Introductionmentioning

confidence: 99%

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Ammonium Bifluoride‐Etched MXene Modified Electrode for the All−Vanadium Redox Flow Battery

Pahlevaninezhad,

Sadri,

Momodu

et al. 2024

Batteries & Supercaps

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The development of electrodes with high performance and long–term stability is crucial for commercial application of vanadium redox flow batteries. This study compared the performance of VRFB with thermal‐treated and MXene‐modified carbon paper. To prepare the MXene, a modified‐etching process with ammonium‐bifluoride (NH4HF2) led to a mild and efficient conversion of the MAX‐phase to MXene compared to etching process with hydrofluoric‐acid (HF). Electron microscopy studies revealed that the etching process with NH4HF2 led to MXene nanostructures with a large interlayer spacing. The results show that at a current density of 60 mA cm‐2, the voltage efficiency with a NH4HF2‐etched MXene‐modified negative electrode increased by 25.5%, 12.5%, and 4% in comparison with pristine, thermal‐treated, and HF‐etched MXene‐modified electrode, respectively. The maximum power density of the battery was increased by more than 40%. In long–term cycling experiments the MXene‐modified electrode exhibited excellent stability over 1000 cycles of charge‐discharge, with 0.05% discharge capacity decay per cycle, amongst the lowest values reported to date and four times lower than for thermally‐treated electrode. The superior performance was linked to the improved electrical conductivity and wettability, higher interlayer spacing, and lower charge transfer resistance for the V2+/V3+ redox reaction.

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Section: Vrfb Flow-cell Performancementioning

confidence: 96%

Section: Mxene Modified Electrode Characterizationmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ammonium Bifluoride‐Etched MXene Modified Electrode for the All−Vanadium Redox Flow Battery

Pahlevaninezhad,

Sadri,

Momodu

et al. 2024

Batteries & Supercaps

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“…Jing et al 88 prepared a novel IL‐MW‐MXene electrocatalyst using ionic liquid etching and microwave‐assisted stripping technology, which has two‐dimensional structure and abundant active functional groups. Carbon fiber felt contains two‐dimensional MXene showed better electrocatalytic activity and hydrophilicity for V 3+ /V 2+ redox reaction.…”

Section: Effect Of Charge Transfer On Electrolytementioning

confidence: 99%

Recent research on vanadium redox batteries: A review on electrolyte preparation, mass transfer, and charge transfer for electrolyte performance enhancement

Ye,

Zhang,

Zhou

et al. 2024

Energy Storage

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Vanadium electrolyte is one of the most critical materials for vanadium redox batteries (VRB). Reducing the cost of vanadium electrolyte and improving its performance are ongoing research priorities for VRB. Currently, the control of the cost of vanadium electrolyte mainly relies on the development of new processes and optimization of traditional processes. Improving the performance of electrolytes mainly involves two aspects: mass transfer and charge transfer, such as introducing additives, optimizing supporting electrolytes, and developing new electrode catalysts. This article reviews the progress in improving the performance of VRB in the past 10 years. It focuses on three main aspects: the preparation of electrolytes, the influence of mass transfer on battery performance, and the influence of charge transfer on battery performance. It also further discusses the impact of different factors on the improvement of VRB performance. Finally, it summarizes the challenges faced by VRB in performance improvement and commercial applications, and made suggestions for future research and development of VRB.

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“…5,6 Among them, the vanadium redox flow battery can be assembled modularly for large scale application, but it is still hampered by issues like high cost, unsatisfactory life cycle, and intricate maintenance of equipment. 7,8 Water electrolysis is a suitable, reliable and scalable solution for renewable energy storage as it is able to convert renewable electricity into the chemical energy of hydrogen. 9 Furthermore, hydrogen fuel cells can be employed to produce electricity when necessary.…”

Section: Ao Xiementioning

confidence: 99%

Hydrogen production by traditional and novel alkaline water electrolysis on nickel or iron based electrocatalysts

et al. 2023

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Ionic liquid etched and microwave-assisted delaminated MXene as an excellent electrocatalyst for the hysteretic negative reaction of vanadium redox flow batteries

Cited by 13 publications

References 55 publications

Ammonium Bifluoride‐Etched MXene Modified Electrode for the All−Vanadium Redox Flow Battery

Ammonium Bifluoride‐Etched MXene Modified Electrode for the All−Vanadium Redox Flow Battery

Recent research on vanadium redox batteries: A review on electrolyte preparation, mass transfer, and charge transfer for electrolyte performance enhancement

Hydrogen production by traditional and novel alkaline water electrolysis on nickel or iron based electrocatalysts

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