Convection battery—modeling, insight, and review

Gordon, Michael J.; Suppes, Galen J.

doi:10.1002/aic.14080

Cited by 15 publications

(21 citation statements)

References 20 publications

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“…In the separator, as velocity increases dc / dx simultaneously decreases. At high velocities, dc / dx is essentially zero . E + increases by at least two orders of magnitude for each order of magnitude increase in the velocity.…”

Section: Discussionmentioning

confidence: 99%

“…Table are values specifically measured for the materials of study reported here. Table reports the remaining parameters used to complete the simulation—these values were fit to the data with values provided from literature and Gordon and Suppes for comparison. These optimized values were determined by a variation of the method of least squares, in which the parameters were continually manipulated until the deviation between experimental and model data was minimized.…”

Section: Model Parametersmentioning

confidence: 99%

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Impact of separator's solid‐phase ion conductivity parameter on convection battery performance and modeling

et al. 2014

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A solid‐phase ion conductivity parameter has been added to the separator of a porous electrode theory description of a convection battery performance to increase the accuracy of this model. With the addition of the ion conductivity parameter, the variances between the model and experimental data have been reduced by 80–85% in both the convection cell and the diffusion cell. The parameter is fundamentally consistent with solid‐phase mechanisms by which ions can transport through separators in parallel with liquid‐phase transport, and the improved modeling results substantiate the importance of solid or surface ion transport mechanisms at high current fluxes. Modeling was supplemented with dimensionless analysis to lump fundamental parameters that are inherently coupled in the underlying equations. From this analysis, a global parameter has been developed describing the ratio of convective charge transfer to diffusive charge transfer that characterizes the transition from diffusive to convective cell behavior. © 2014 American Institute of Chemical Engineers AIChE J, 60: 3784–3791, 2014

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Section: Discussionmentioning

confidence: 99%

Section: Model Parametersmentioning

confidence: 99%

Impact of separator's solid‐phase ion conductivity parameter on convection battery performance and modeling

et al. 2014

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“…Alternative flow battery systems beyond the conventional dissolved transition metal electrolytes have also been reported in the literature, including lead-based flow batteries with soluble lead [10] and polymer suspensions [11]. Another modified flow battery that has been developed is a convection battery with the electroactive materials fixed and electrolyte flowing to improve the mass 2 transport of ionic species in the electrolyte [12,13]. These reported systems, however, have performance limitations due to maximum practical electrode thicknesses or the inefficient pumping due to high pressure drop.…”

Section: Introductionmentioning

confidence: 99%

A carbon-free lithium-ion solid dispersion redox couple with low viscosity for redox flow batteries

Koenig

2016

Journal of Power Sources

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A new type of non-aqueous redox couple without carbon additives for flow batteries is proposed and the target anolyte chemistry is demonstrated. The socalled "Solid Dispersion Redox Couple" incorporates solid electroactive materials dispersed in organic lithium-ion battery electrolyte as its flowing suspension. In this work, a unique and systematic characterization approach has been used to study the flow battery redox couple in half cell demonstrations relative to a lithium electrode. An electrolyte laden with Li 4 Ti 5 O 12 (LTO) has been characterized in multiple specially designed lithium half cell configurations. The flow battery redox couple described in this report has relatively low viscosity, especially in comparison to other flow batteries with solid active materials. The lack of carbon additive allows characterization of the electrochemical properties of the electroactive material in flow without the complication of conductive additives and unambiguous observation of the electrorheological coupling in these dispersed particle systems. 2 3 4 5 6 7 8

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“…Most of these studies have focused on solving problems arising from the activation and ohmic polarizations, while ignoring the issue relating to mass transport. In fact, mass transport is of great significance for battery performance, especially for operations running at high power density and high state of charge ( SoC )/state of discharge ( SoD ) …”

Section: Introductionmentioning

confidence: 99%

Flow field design and optimization of high power density vanadium flow batteries: A novel trapezoid flow battery

et al. 2017

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Vanadium flow battery (VFB) is one of the preferred techniques for efficient large‐scale energy storage applications. The key issue for its commercialization is cost reduction, which can be achieved by developing high power density VFB stacks. One of the effective strategies for developing high power density stacks is to enhance the mass transport by performing flow field design. Based on the maldistribution characteristics of concentration polarization inside a conventional rectangular flow battery (RFB), a novel trapezoid flow battery (TFB) was first proposed. Furthermore, a practical and general strategy, consisting of a stepping optimization method and an arithmetic progression model, has been developed for the TFB's structure optimization. By combining numerical simulation with charge‐discharge test of the magnified stacks, it was verified that mass transport enhancement and performance improvement of the optimized TFB, with significant increments in voltage efficiency and electrolyte utilization, allowed it to possess great superiority over the RFB. © 2017 American Institute of Chemical Engineers AIChE J, 64: 782–795, 2018

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Convection battery—modeling, insight, and review

Cited by 15 publications

References 20 publications

Impact of separator's solid‐phase ion conductivity parameter on convection battery performance and modeling

Impact of separator's solid‐phase ion conductivity parameter on convection battery performance and modeling

A carbon-free lithium-ion solid dispersion redox couple with low viscosity for redox flow batteries

Flow field design and optimization of high power density vanadium flow batteries: A novel trapezoid flow battery

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