Redox-targeted catalysis for vanadium redox-flow batteries

Zhang, Feifei; Huang, Su; Wang, Xun; Jia, Chuankun; Du, Yonghua; Wang, Qing

doi:10.1016/j.nanoen.2018.07.058

Cited by 44 publications

(42 citation statements)

References 34 publications

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“…It is reported that more than 100 articles had been published, which is bound up with the surface treatments of GF and CF electrodes up until 2018, such as thermal activation, acid treatment, and metal doping . More and more researchers are attempting various means for enhancing the electrochemical activity of GF or CF electrode …”

Section: Introductionmentioning

confidence: 99%

“…13 More and more researchers are attempting various means for enhancing the electrochemical activity of GF or CF electrode. [18][19][20][21][22][23] The influence of GF and CF on the performance of vanadium redox flow battery (VRFB) has been widely reported, [24][25][26][27] while there is less literature on this issue for the application of ICRFBs, as shown in Table S1. Liu et al reported that in comparison with GF, the VRFB adopted with CF exhibits much higher electrochemical activity.…”

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confidence: 99%

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Investigations on physicochemical properties and electrochemical performance of graphite felt and carbon felt for iron‐chromium redox flow battery

et al. 2020

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Summary In this paper, polyacrylonitrile‐based graphite felt (GF), carbon felt (CF) and the effect of thermal activation on them with or without the catalyst (BiCl3) are comprehensively investigated for iron‐chromium redox flow battery (ICRFB) application. The physical‐chemical parameters of GF and CF after the thermal activation is affected significantly by their graphitization degree, oxygen functional groups, and surface area. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) results manifest that GF and CF before and after the thermal activation have different electrocatalytic activities owing to oxygen functional groups number increase and the graphitization degree decrease. In terms of the capacity decay rate, as oxygen functional groups provide shorter electrocatalytic pathways than bismuth ions, the performance of GF and CF after the thermal activation is more ideal. As a result, GF before and after the thermal activation exhibits higher efficiency (EE: 86%) and better stability at a charge‐discharge current density of 60 mA·cm−2 than those of CF during charge‐discharge cycling, as the dominant limitation in an ICRFB is ohmic and activation polarization. Therefore, GF after thermal activation together with the addition of BiCl3 in the electrolyte is a more promising electrode material for ICRFBs application than CF.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Investigations on physicochemical properties and electrochemical performance of graphite felt and carbon felt for iron‐chromium redox flow battery

et al. 2020

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“…The electrolytes are separated by proton‐exchange membrane forming two compartments. VRFB employing vanadium ions in different valence states as active species could reducec cross‐contamination significantly . A normal voltage of 1.26 V for VRFB is obtained from following reactions:…”

Section: Introductionmentioning

confidence: 99%

“…Normally, two main methods are employed to enhance the electrocatalytic properties of VRFB electrode materials. One is to advance the effective surface area for reaction places and active sites; the other is to modify electrodes with electrocatalysts …”

Section: Introductionmentioning

confidence: 99%

“…One is to advance the effective surface area for reaction places and active sites; the other is to modify electrodes with electrocatalysts. 12,15 In VRFB system, V 2+ /V 3+ reaction attests a severer voltage loss, resulting from the fact that heterogeneous electrons transfer at a slower rate compared with VO 2+ / VO 2 + reaction. 16 In recent years, titanium-based com-…”

Section: Introductionmentioning

confidence: 99%

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Electrocatalytic performance of TiO ₂ with different phase state towards V ²⁺ /V ³⁺ reaction for vanadium redox flow battery

Cheng

et al. 2019

Int J Energy Res

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Summary In this paper, titanium dioxide (TiO2) nanoparticles were employed as catalysts towards V2+/V3+ redox couple of vanadium redox flow battery (VRFB). The effect of TiO2 phase on the electrocatalytic performance for negative couple was systematically investigated. The electrochemical properties of TiO2 with different phase were assessed via cyclic voltammetry and electrochemical impedance spectroscopy by using AB as conductive agent. Obtained from the results, anatase TiO2 (α‐TiO2) exhibits superior electrocatalytic activity to rutile TiO2 (γ‐TiO2). The VRFB cell performs well at discharge capacity, voltage efficiency, and energy efficiency by employing α‐TiO2‐modified negative electrode with current density varying between 50 and 100 mA cm−2. The discharge capacity of α‐TiO2‐modified cell with vanadium ion concentration of 1.6 M comes up to 113.5 mA h at 100 mA cm−2 current density, which is increased by 39.1 mA h after modification for negative electrode. Moreover, the corresponding energy efficiency increases by 7.5% after modification of α‐TiO2. Experimental results show that TiO2 is an ideal catalyst for VRFB. Moreover, α‐TiO2 demonstrates superior electrocatalytic performance to γ‐TiO2 towards V2+/V3+ reaction.

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Redox‐Active Inorganic Materials for Redox Flow Batteries

Luo

Debruler

et al. 2019

Encyclopedia of Inorganic and Bioinorganic Chemistry

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Continuous growth in utilization of renewable but intermittent energy such as solar and wind will accelerate the demand for grid‐scale energy storage systems. Redox flow batteries (RFBs) have been intensively studied for large‐scale energy storage (MW/MWh), which is particularly attractive when integrated with renewable energy sources. In past decades, extensive efforts have been made to improve electrochemical performance of the RFBs by exploring various active materials, from inorganic redox‐active materials to organic redox‐active molecules. Compared to burgeoning organic RFBs, inorganic RFBs have received extensive research and development in the last several decades. A great deal of efforts has been exerted to commercialize several inorganic RFB systems such as all‐vanadium RFBs and zinc–bromine RFBs. In this article, inorganic redox‐active materials (e.g., metal salts, halides, polysulfides, polyoxometalate (POM), etc.) applied in RFBs are reviewed with a primary focus on their most recent technological advances in aqueous inorganic RFBs. The advantages and limitations of different inorganic RFBs are discussed. Further technological challenges and perspective on inorganic RFBs are also highlighted.

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Redox-targeted catalysis for vanadium redox-flow batteries

Cited by 44 publications

References 34 publications

Investigations on physicochemical properties and electrochemical performance of graphite felt and carbon felt for iron‐chromium redox flow battery

Investigations on physicochemical properties and electrochemical performance of graphite felt and carbon felt for iron‐chromium redox flow battery

Electrocatalytic performance of TiO ₂ with different phase state towards V ²⁺ /V ³⁺ reaction for vanadium redox flow battery

Redox‐Active Inorganic Materials for Redox Flow Batteries

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Redox-targeted catalysis for vanadium redox-flow batteries

Cited by 44 publications

References 34 publications

Investigations on physicochemical properties and electrochemical performance of graphite felt and carbon felt for iron‐chromium redox flow battery

Investigations on physicochemical properties and electrochemical performance of graphite felt and carbon felt for iron‐chromium redox flow battery

Electrocatalytic performance of TiO 2 with different phase state towards V 2+ /V 3+ reaction for vanadium redox flow battery

Redox‐Active Inorganic Materials for Redox Flow Batteries

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Electrocatalytic performance of TiO ₂ with different phase state towards V ²⁺ /V ³⁺ reaction for vanadium redox flow battery