Enhancing the stability and capacitance of vanadium oxide nanoribbons/3D-graphene binder-free electrode by using VOSO4 as redox-active electrolyte

Wang, Ai-Yin; Chaudhary, Manchal; Lin, Tsung‐Wu

doi:10.1016/j.cej.2018.08.214

Cited by 67 publications

(12 citation statements)

References 51 publications

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“…VOSO 4 as the source of VO 2+ was thus introduced as a promising redox additive to evaluate the electrochemical performance. Very recently, Wang and co-workers 17 studied the electrochemical performance of vanadium oxide nanoribbons/3D-graphene composites (VO x -3DG) in the aqueous electrolytes of KCl and VOSO 4 + KCl. They observed that both the capacitance and stability could be significantly improved in VOSO 4 + KCl electrolyte compared with those in KCl electrolyte.…”

Section: Additives In Aqueous Electrolyte Inorganic Redox Additives I...mentioning

confidence: 99%

Mini-Review on the Redox Additives in Aqueous Electrolyte for High Performance Supercapacitors

et al. 2020

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Supercapacitors, also known as electrochemical capacitors, are attracting much research attention owing to their high power density, long-term cycling stability, as well as exceptional safety compared with rechargeable batteries, although the globally accepted quantitative benchmarks on the power density, cycling stability, and safety are yet to be established. However, it should be noted that the supercapacitors generally exhibit low energy density, which cannot satisfy the demands where both high energy density and power density are needed. To date, various methods have been employed to improve the electrochemical performances of supercapacitors. Among them, introducing redox additives (or redox mediators) into conventional aqueous electrolyte is regarded as one of the most promising strategies. The redox additives in aqueous electrolyte are widely demonstrated to be able to increase the charge storage capability via redox transformation and thus enhance the electrochemical performances. Herein, we present a brief review on the classification, state-of-the-art progress, challenges, and perspectives of the redox additives in aqueous electrolyte for high performance supercapacitors.

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Section: Additives In Aqueous Electrolyte Inorganic Redox Additives I...mentioning

confidence: 99%

Mini-Review on the Redox Additives in Aqueous Electrolyte for High Performance Supercapacitors

et al. 2020

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“…These redox media can afford additional capacitive contributions through their reversible electrochemical reactions and can improve the electrochemical performance of assembled symmetric/asymmetric SCs. Electrolytes with a variety of redox-active additions have been studied, such as H 2 SO 4 + FeBr 3 and KCl + VOSO 4 [36,37], H 2 SO 4 + KI, H 2 SO 4 + VO 2+ /VO 2 + and KOH + K 3 Fe(CN) 6 [38,39,40], H 2 SO 4 + hydroquinone [41], and H 2 SO 4 + Fe 2+ /Fe 3+ [42,43,44]. Among these, active electrolytes containing Fe 3+ /Fe 2+ redox couples are easily available and cost effective, and they have been shown to be promising electrolytes in SCs, where PANI has been found to exhibit an enhanced C s of 1062 F g −1 at a current density of 2 A g −1 [42].…”

Section: Introductionmentioning

confidence: 99%

Redox-Active Gel Electrolyte Combined with Branched Polyaniline Nanofibers Doped with Ferrous Ions for Ultra-High-Performance Flexible Supercapacitors

Meng

Xia

et al. 2019

Polymers

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In this work, the effects of utilizing an Fe2+/Fe3+ redox-active electrolyte and Fe2+-doped polyaniline (PANI) electrode material on the performance of an assembled supercapacitor (SC) were studied. The concentration of the redox couple additive in the electrolyte of the SC was optimized to be 0.5 M. With the optimized concentration of 0.4 M Fe2+, the doped PANI branched nanofibers electropolymerized onto titanium mesh were much thinner, cleaner, and more branched than normal PANI. A specific capacitance (Cs) of 8468 F g−1 for the 0.4 M Fe2+/PANI electrode in the 1 M H2SO4 + 0.5 M Fe2+/Fe3+ gel electrolyte and an energy density of 218.1 Wh kg−1 at a power density of 1854.4 W kg−1 for the resultant SC were achieved, which were much higher than those of the conventional PANI electrode tested in a normal H2SO4 electrolyte (404 F g−1 and 24.9 Wh kg−1). These results are among the highest reported for PANI-based SCs in the literature so far and demonstrate the potential effectiveness of this strategy to improve the electrochemical performance of flexible SCs by modifying both the electrode and electrolyte.

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“…The specific capacity of ASC can be seen in Table S3. In the Ragone plot of ASC in Figure f, the maximum energy density and maximum power density are 39.4 Wh kg –1 and 5.5 kW kg –1 , respectively, which are comparable or superior to those of other reported ASCs. − In addition, as listed in Table S2, the energy densities and power densities of the self-standing electrodes and wide-voltage ASCs were compared.…”

Section: Resultsmentioning

confidence: 69%

Aerobic Recovered Carbon Fiber Support-Based MoO₂//MnO₂ Asymmetric Supercapacitor with a Widened Voltage Window

Zhao

Zhou

et al. 2021

Energy Fuels

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Aerobic recovered carbon fibers (ARCFs) are chosen as functionalized support for both anodic MoO 2 and cathodic MnO 2 of asymmetric supercapacitors (ASCs). Based on the improved surface area, enhanced specific capacitance, and expanded potential window derived from O-containing radicals on the ARCF surface, the potentials of MoO 2 /ARCF anode and MnO 2 /ARCF cathode are respectively widened to −1.2 to 0 and 0−1.0 V, and thus the voltage range of ASC constructed by the MoO 2 /ARCF anode and MnO 2 /ARCF cathode is 2.2 V. In addition, this ASC exhibits a maximum energy density of 39.4 Wh kg −1 and power density of 5.5 kW kg −1 and owns 93.75% capacitance retention after 3000 cycles. This work provides a new strategy to develop a high-performance energy-storage device by choosing a functionalized support.

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Enhancing the stability and capacitance of vanadium oxide nanoribbons/3D-graphene binder-free electrode by using VOSO4 as redox-active electrolyte

Cited by 67 publications

References 51 publications

Mini-Review on the Redox Additives in Aqueous Electrolyte for High Performance Supercapacitors

Mini-Review on the Redox Additives in Aqueous Electrolyte for High Performance Supercapacitors

Redox-Active Gel Electrolyte Combined with Branched Polyaniline Nanofibers Doped with Ferrous Ions for Ultra-High-Performance Flexible Supercapacitors

Aerobic Recovered Carbon Fiber Support-Based MoO₂//MnO₂ Asymmetric Supercapacitor with a Widened Voltage Window

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Enhancing the stability and capacitance of vanadium oxide nanoribbons/3D-graphene binder-free electrode by using VOSO4 as redox-active electrolyte

Cited by 67 publications

References 51 publications

Mini-Review on the Redox Additives in Aqueous Electrolyte for High Performance Supercapacitors

Mini-Review on the Redox Additives in Aqueous Electrolyte for High Performance Supercapacitors

Redox-Active Gel Electrolyte Combined with Branched Polyaniline Nanofibers Doped with Ferrous Ions for Ultra-High-Performance Flexible Supercapacitors

Aerobic Recovered Carbon Fiber Support-Based MoO2//MnO2 Asymmetric Supercapacitor with a Widened Voltage Window

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Aerobic Recovered Carbon Fiber Support-Based MoO₂//MnO₂ Asymmetric Supercapacitor with a Widened Voltage Window