Acceleration of the redox kinetics of VO2+/VO2 + and V3+/V2+ couples on carbon paper

Xiong, Wu; Yamamura, Tomoo; Ohta, Suguru; Zhang, Qi Xiu; Lv, Fu Cong; Liu, Can Ming; Shirasaki, Kenji; Satoh, Ichiro; Shikama, Tatsuo; Lu, Dan; Liu, Su Qin

doi:10.1007/s10800-011-0343-7

Cited by 82 publications

(59 citation statements)

References 31 publications

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“…32 The effect of catalyst incorporation into the carbon paper electrode was also studied by Zhang et al by coating WO 3 nanoprticles and activated carbon on the surface. 40 Compared to bare carbon paper electrode, the proposed electrode showed a notable improvement in the V 2+ /V 3+ and VO 2 + /VO 2+ redox reactions.…”

Section: Carbon Paper Electrodementioning

confidence: 99%

A technology review of electrodes and reaction mechanisms in vanadium redox flow batteries

et al. 2015

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The vanadium redox flow battery, which was first suggested by Skyllas -Kazacos and co-workers in 1985, is an electrochemical storage system which allows energy to be stored in two solutions containing different redox couples. Unlike commercially available batteries, all vanadium redox flow batteries have unique configurations, determined by the size of the electrolyte tanks. This technology has been proven to be an economically attractive and low-maintenance solution, with significant benefits over the other types of batteries. Moreover, the soaring demand for large-scale energy storage has, in turn, increased demands for unlimited capacity, design flexibility, and good safety systems. This work reviews and discusses the progress on electrodes their reaction mechanisms as key components of the vanadium redox flow battery over the past 30 years. In terms of future outlook, we also provide practical guidelines for the further development of self-sustaining electrodes for vanadium redox flow batteries as an attractive energy storage system.

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Section: Carbon Paper Electrodementioning

confidence: 99%

A technology review of electrodes and reaction mechanisms in vanadium redox flow batteries

et al. 2015

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“…The kinetics of both the V II /V III and V IV /V V redox couples have been studied for a range of different carbon materials using a variety of techniques and it is clear that the kinetic rates depend strongly both on the type of carbon used and on the preparation of the electrode surface. 31,[35][36][37][38] Generally, the kinetics are found to be faster for V IV [17][18][19]21 and inhibition of V IV /V V electrode kinetics 17-21 by anodic treatment. In this paper we report detailed results on the effects of both anodic and cathodic treatment on the kinetics of the V IV /V V couple at carbon electrodes (glassy carbon, graphite, carbon paper, reticulated vitreous carbon (RVC), and carbon fibers).…”

mentioning

confidence: 99%

Effect of Cathodic and Anodic Treatments of Carbon on the Electrode Kinetics of V^IV/V^VOxidation-Reduction

Bourke¹,

Miller²,

Lynch³

et al. 2015

J. Electrochem. Soc.

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Cyclic voltammetry and electrochemical impedance spectroscopy were used to examine several types of carbon electrodes in V IV /V V in H 2 SO 4 . The materials investigated included glassy carbon, graphite, carbon paper, reticulated vitreous carbon and carbon fibers. In all cases the electrode kinetics of the V IV /V V oxidation-reduction reactions are enhanced by cathodic treatment of the electrode and inhibited by anodic treatment. Pronounced activation typically occurs at potentials more negative than +0.1 V (vs. Hg/Hg 2 SO 4 ); the effect begins to saturate at about -0.6 V. Pronounced deactivation typically occurs at potentials more positive than +0.7 V. Both activation and deactivation occur rapidly during the first ∼10 s at the most negative and most positive potentials, respectively. The activation effect saturates quickly at the most negative potentials but the deactivation effect does not saturate on the time scales investigated. There is a considerable shift (∼1.1 V) between the potentials for activation and deactivation. Activated electrodes showed no significant loss of activity after standing in the electrolyte for 3 weeks; deactivated electrodes regained about 50% of their activity. The activation and deactivation effects were observed regardless of whether vanadium was present in the electrolyte and are attributed to oxygen-containing functional groups on the electrode surface. All-Vanadium Flow Batteries (VFBs) are a promising technology to meet energy storage requirements for large scale and remote area applications.1-6 Like other flow battery systems the VFB is an electrochemical device that converts electrical energy to chemical energy which is stored in the electrolyte. Typical cells have carbon felt electrodes separated by a proton exchange membrane. The catholyte and the anolyte are circulated through the electrodes from reservoirs. Both electrolytes are highly acidic, typically 3 mol dm A variety of electrode treatments have been reported, including electrochemical, 17-28 chemical, 22,23,27,29,30 and thermal 31-34 treatments. These treatments often have the effect of oxidizing or reducing the surface and the influence of surface oxygen species on the performance of carbon electrodes is recognized, 50-53 although often not well understood.In order to better understand and improve the performance of VFB electrodes, it is important to investigate the electrode kinetics. The kinetics of both the V II /V III and V IV /V V redox couples have been studied for a range of different carbon materials using a variety of techniques and it is clear that the kinetic rates depend strongly both on the type of carbon used and on the preparation of the electrode surface. 31,[35][36][37][38] Generally, the kinetics are found to be faster for V IV [17][18][19]21 and inhibition of V IV /V V electrode kinetics 17-21 by anodic treatment. In this paper we report detailed results on the effects of both anodic and cathodic treatment on the kinetics of the V IV /V V couple at carbon electrodes (glassy carbon, gra...

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“…where F is the Faraday constant, 96500 C mol −1 ; k o denotes the reaction rate constant, cm s −1 ; E p represents the peak potential, with a unit of V; E° ′ is the formal potential, with a unit of V. E° ′ can be estimated by the following formula:

true E^{o^{'}} = m^{- 1} \sum_{n = 1}^{m} (E_{p a} + E_{p c}) / 2

…”

Section: Resultsmentioning

confidence: 99%

Polarization Effects of a Rayon and Polyacrylonitrile Based Graphite Felt for Iron‐Chromium Redox Flow Batteries

et al. 2019

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In this paper, a rayon based graphite felt (R‐GF) and a polyacrylonitrile based graphite felt (PAN‐GF) are studied to clarify the influence of the precursor on the polarization effect from three aspects: concentration polarization, ohmic polarization, and electrochemical polarization. The essential difference in chemical structure between R‐GF and PAN‐GF is that the precursor material makes PAN‐GF easier to be graphitized. The higher degree of graphitization leads to a higher conductivity of PAN‐GF. At the same thickness and porosity, the conductivity of PAN‐GF is higher and the loss of ohmic polarization is smaller. These factors make PAN‐GF have better electrocatalytic properties and kinetic reversibility in the Fe/Cr electrolyte environment. While the surface roughness of R‐GF is larger, which is contributing to the diffusion and surface mass transfer of the electrolyte on the surface. The effect of precursor on the concentration polarization of R‐GF and PAN‐GF is related to the surface mass transfer, which ultimately affects the performance of ICRFB.

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Acceleration of the redox kinetics of VO2+/VO2 + and V3+/V2+ couples on carbon paper

Cited by 82 publications

References 31 publications

A technology review of electrodes and reaction mechanisms in vanadium redox flow batteries

A technology review of electrodes and reaction mechanisms in vanadium redox flow batteries

Effect of Cathodic and Anodic Treatments of Carbon on the Electrode Kinetics of V^IV/V^VOxidation-Reduction

Polarization Effects of a Rayon and Polyacrylonitrile Based Graphite Felt for Iron‐Chromium Redox Flow Batteries

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Acceleration of the redox kinetics of VO2+/VO2 + and V3+/V2+ couples on carbon paper

Cited by 82 publications

References 31 publications

A technology review of electrodes and reaction mechanisms in vanadium redox flow batteries

A technology review of electrodes and reaction mechanisms in vanadium redox flow batteries

Effect of Cathodic and Anodic Treatments of Carbon on the Electrode Kinetics of VIV/VVOxidation-Reduction

Polarization Effects of a Rayon and Polyacrylonitrile Based Graphite Felt for Iron‐Chromium Redox Flow Batteries

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Effect of Cathodic and Anodic Treatments of Carbon on the Electrode Kinetics of V^IV/V^VOxidation-Reduction