Materials, system designs and modelling approaches in techno-economic assessment of all-vanadium redox flow batteries – A review

Minke, Christine; Turek, Thomas

doi:10.1016/j.jpowsour.2017.11.058

Cited by 211 publications

(94 citation statements)

References 25 publications

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“…[2] However, to allow commercial viability of a wide range of applications,c apital and operatinge xpenditures must be reduced. The membrane is the key component to address this problem,p rimarily because it provides the largest potentialf or direct cost reduction, [3] and secondarily because it governs electrolyte transport processes that may result in electrolyte imbalance, thereby,l imiting the accessible capacity. Electrolyte imbalance originates from an et vanadium transport across the membrane resulting in vanadium accumulation on one sidea nd vanadium deficiency on the other side of the electrolyte.…”

Section: Introductionmentioning

confidence: 99%

Tackling Capacity Fading in Vanadium Redox Flow Batteries with Amphoteric Polybenzimidazole/Nafion Bilayer Membranes

et al. 2019

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Vanadium flow batteries are among the most promising technologies for stationary energy storage applications if their cost of storage can be further decreased. Capacity fading resulting from imbalanced vanadium crossover is a key operating cost component. Herein, a new approach is reported to avoid this cost by balancing electrolyte transport with amphoteric bilayer Nafion/meta‐polybenzimidazole membranes. Within this system, the anion‐ and cation‐exchange capacity can be tuned in a straightforward manner by changing the thickness of the respective polymer layer to balance electrolyte transport for a given current density. At high current densities, a net migrative flux of vanadium directed towards the positive side is observed owing to the higher average charge of vanadium ions present at the negative side. The coulombic repulsion between the vanadium ions and the positive charges in the membrane counteracts this migrative transport and can reverse the direction of the net vanadium flux. For a technically relevant current density of 120 mA cm−2, a PBI thickness of 3–4 μm is required to balance the vanadium crossover and to minimize capacity fading.

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Section: Introductionmentioning

confidence: 99%

Tackling Capacity Fading in Vanadium Redox Flow Batteries with Amphoteric Polybenzimidazole/Nafion Bilayer Membranes

et al. 2019

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“…Redox flow batteries (RFBs) are a promising technology to compensate and stabilize the power grid. [1][2][3][4] All-Vanadium redox flow batteries (VRFBs) are the most common, well studied redox flow battery type since its development in the late 1980s by Skyllas-Kazacos. 2,5 The electrodes are a crucial part of the VRFB, since its chemical, physical and structural properties affect parameters like cell performance, efficiency, durability and even acquisition and operating costs.…”

mentioning

confidence: 99%

Characterization of Carbon Felt Electrodes for Vanadium Redox Flow Batteries: Impact of Treatment Methods

Eifert

Banerjee

Jusys

et al. 2018

J. Electrochem. Soc.

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In this study, we investigated the influence of thermal treatment, soaking in H 2 SO 4 and electrochemical ageing on commercially available carbon felt materials from SGL carbon. We compared both the influence of the pre-treatment (carbonization or graphitization) and the influence of the precursor (Rayon or PAN). By thermogravimetric analysis coupled with mass spectrometry (TGA-MS) we showed, that after thermal treatment, the thermal stability was lower for carbonized felts compared to graphitized felts and the Rayon based felts were more stable than PAN based ones. Soaking had a stronger impact on the thermal stability of PAN based felts, whereas it was similar to the electrochemical ageing for Rayon based felts. X-ray photoelectron spectroscopy and Raman spectroscopy revealed that thermal treatment reduces the overall surface oxygen content for all felt types and the degree of graphitization doesn't change, but the content of single bonded oxygen was increased for graphitized carbon felts, only. For carbonized felts, thermal treatment highly reduced the electrochemical activity characterized by cyclic voltammetry due to a reduced overall oxygen content and increased C=O and C=C contents. In this work, we provide a comprehensive overview of commercially available carbon felts and characterize the effects of several treatment methods.) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 141.52.96.103 Downloaded on 2018-09-04 to IP A2578 Journal of The Electrochemical Society, 165 (11) A2577-A2586 (2018) ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 141.52.96.103 Downloaded on 2018-09-04 to IP ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 141.52.96.103 Downloaded on 2018-09-04 to IP

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“…The all-vanadium redox-flow battery (VFB) is the most investigated RFB [4]. However, until now, VFBs have not been able to widely capture this new market, which is mainly due to their high investment costs [5]. A significant increase of the VFB performance in terms of power density and cyclability could lower these costs.…”

Section: Introductionmentioning

confidence: 99%

Exploring Flow Characteristics in Vanadium Redox‐Flow Batteries: Optical Measurements and CFD Simulations

Prumbohm

Wehinger

2019

Chemie Ingenieur Technik

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A thorough understanding of the flow characteristics of vanadium redox-flow batteries is essential for their improvement. With a combined approach of CFD simulations linked with optical measurements, the distribution in a carbon felt electrode of the vanadium electrolyte as well as of an alternative fluid substitute is compared and in all three dimensions analyzed leading to qualitatively consistent results. Yet, the experimentally observed partially inhomogeneous flow distribution is not predicted by the pseudo-homogeneous porous media CFD model.

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Materials, system designs and modelling approaches in techno-economic assessment of all-vanadium redox flow batteries – A review

Cited by 211 publications

References 25 publications

Tackling Capacity Fading in Vanadium Redox Flow Batteries with Amphoteric Polybenzimidazole/Nafion Bilayer Membranes

Tackling Capacity Fading in Vanadium Redox Flow Batteries with Amphoteric Polybenzimidazole/Nafion Bilayer Membranes

Characterization of Carbon Felt Electrodes for Vanadium Redox Flow Batteries: Impact of Treatment Methods

Exploring Flow Characteristics in Vanadium Redox‐Flow Batteries: Optical Measurements and CFD Simulations

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