Experimental study on the performance of a vanadium redox flow battery with non-uniformly compressed carbon felt electrode

Wang, Qiuwang; Qu, Zhiguo; Jiang, Zhuangde; Yang, Weiwei

doi:10.1016/j.apenergy.2018.01.047

Cited by 114 publications

(57 citation statements)

References 45 publications

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“…Attention should be paid to well-defined and reproducible electrode compression [131]. The correlation between carbon felt compression and cell performance has been studied and careful optimization is recommended [132].…”

Section: Methodsmentioning

confidence: 99%

Electrocatalysis at Electrodes for Vanadium Redox Flow Batteries

Holze

2018

Batteries

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Flow batteries (also: redox batteries or redox flow batteries RFB) are briefly introduced as systems for conversion and storage of electrical energy into chemical energy and back. Their place in the wide range of systems and processes for energy conversion and storage is outlined. Acceleration of electrochemical charge transfer for vanadium-based redox systems desired for improved performance efficiency of these systems is reviewed in detail; relevant data pertaining to other redox systems are added when possibly meriting attention. An attempt is made to separate effects simply caused by enlarged electrochemically active surface area and true (specific) electrocatalytic activity. Because this requires proper definition of the experimental setup and careful examination of experimental results, electrochemical methods employed in the reviewed studies are described first.

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Section: Methodsmentioning

confidence: 99%

Electrocatalysis at Electrodes for Vanadium Redox Flow Batteries

Holze

2018

Batteries

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“…More and more demands for renewable energy bring about extensive attention to the large‐scale energy storage systems . Among them, all vanadium redox flow battery (VRFB) shows superiority by reason of its long cycling life, deep discharge, high‐energy efficiency, and mutual independence of power and energy ratings . In spite of the aforementioned advantages, the important issues with respect to discharge capacity of the battery, output power, and the efficiencies are still existing.…”

Section: Introductionmentioning

confidence: 99%

“…Besides, properties of the electrolyte and the membrane are also improved by the researchers . For the given assembly materials and electrolyte, performance of the battery can be enhanced by optimizing its structures as well as the operating conditions that play an important role in the species transport of the VRFBs …”

Section: Introductionmentioning

confidence: 99%

“…14 Besides, properties of the electrolyte and the membrane are also improved by the researchers. [15][16][17] For the given assembly materials and electrolyte, performance of the battery can be enhanced by optimizing its structures as well as the operating conditions 5,6,[18][19][20][21][22][23][24][25] that play an important role in the species transport of the VRFBs. 26 In the VRFB, one disadvantageous characteristic is the vanadium transport across the membrane, ie, vanadium crossover.…”

Section: Introductionmentioning

confidence: 99%

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An optimal electrolyte addition strategy for improving performance of a vanadium redox flow battery

Yang

Deng

et al. 2020

Int J Energy Res

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Summary In this paper, the influences of multistep electrolyte addition strategy on discharge capacity decay of an all vanadium redox flow battery during long cycles were investigated by utilizing a 2‐D, transient mathematical model involving diffusion, convection, and migration mechanisms across the membrane as well as the contact resistance in the battery. Results show that with various multistep electrolyte addition strategies, the discharge capacity decay of the battery can be diminished. An optimal multistep electrolyte addition strategy is presented, which is corresponding to adding 1.04 mol L−1 V3+ electrolyte to a negative tank while adding 1.04 mol L−1 VO2+ electrolyte to a positive tank. Results show that capacity decay of the battery can be debased by 10.8%, which is due to increased vanadium ions in the negative side and the decreased state‐of‐charge (SOC) imbalance between two half‐cells. This study will propose a practical method for mitigating the discharge capacity decay of the battery during operation.

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“…The electrode thickness also plays a significant role in the electrochemical performance [22] and the pressure drop in the cell [23], which can be modulated by abutting multiple single electrode layers. Finally, studies in the electrode porosity and permeability reveal connections to the peak power [24], accessible energy density [25], energy efficiency [25][26][27][28], and fluid dynamics [29]. Indeed, the electrode structure-performance relationship can be elucidated with systematic experimental analyses; however, these campaigns can be time-, labor-, and resource-intensive.…”

Section: Introductionmentioning

confidence: 99%

Integrated Numerical and Experimental Data-Driven Parameter Identification of Electrode Properties in All-Vanadium Redox Flow Batteries

Cheng¹,

Tenny²,

Pizzolato³

et al. 2020

Preprint

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The vanadium redox flow battery (VRFB) is a promising energy storage technology for stationary applications (e.g., renewables integration) that offers a pathway to cost-effectiveness through independent scaling of power and energy as well as longevity. Many current research efforts are focused on improving battery performance through electrode modifications, but high-throughput, laboratory-scale testing can be time- and material-intensive. Advances in multiphysics-based numerical modeling and data-driven parameter identification afford a computational platform to expand the design space by rapidly screening a diverse array of electrode configurations. Herein, a 3D VRFB model is first developed and validated against experimental results. Subsequently, a new 2D model is composed, yielding a computationally light simulation framework, which is used to generate a dataset of 16800 electrode property combinations under four different cell voltages to track the impact of different structural parameters on the cell current density. These structure-performance relationships are quantified using Kendall $\tau$ rank correlation coefficients to highlight the dependence of cell performance on bulk electrode morphology and to identify improved property sets. This statistical framework may serve as a general guideline for parameter identification for more advanced electrode designs.

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Experimental study on the performance of a vanadium redox flow battery with non-uniformly compressed carbon felt electrode

Cited by 114 publications

References 45 publications

Electrocatalysis at Electrodes for Vanadium Redox Flow Batteries

Electrocatalysis at Electrodes for Vanadium Redox Flow Batteries

An optimal electrolyte addition strategy for improving performance of a vanadium redox flow battery

Integrated Numerical and Experimental Data-Driven Parameter Identification of Electrode Properties in All-Vanadium Redox Flow Batteries

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