Effect of variable cross-section electrode on the battery performance of all-vanadium redox flow battery

Liu, Xi; Zhang, Pengfei; Yang, Jialin; Li, Jing‐Feng; Chu, Fengming

doi:10.1016/j.ijheatmasstransfer.2023.124382

Cited by 11 publications

(7 citation statements)

References 30 publications

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“…In general, carbon paper, carbon felt, and graphite are the most used materials due to their high porosity and specic surface area. [65][66][67][68][69][70][71][72]…”

Section: Working Principlementioning

confidence: 99%

Beyond conventional batteries: a review on semi-solid and redox targeting flow batteries-LiFePO₄ as a case study

El Halya,

Tayoury,

Aqil

et al. 2024

Sustainable Energy Fuels

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“…In general, carbon paper, carbon felt, and graphite are the most used materials due to their high porosity and specic surface area. [65][66][67][68][69][70][71][72]…”

Section: Working Principlementioning

confidence: 99%

Beyond conventional batteries: a review on semi-solid and redox targeting flow batteries-LiFePO₄ as a case study

El Halya,

Tayoury,

Aqil

et al. 2024

Sustainable Energy Fuels

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show abstract

“…Four sets of governing equations are used to respectively solve the electrolyte flow through channel and porous electrode, ions transfer in vanadium solution, charge transport through liquid-solid interface, and the relationship of overpotential and electrode current density. 5,20 To analyze the temperature changes within the cell, a nonisothermal model was introduced in the simulation. The energy equation takes into account heat generation by heat conduction, convection, electrochemical reaction, and Ohmic resistance.…”

Section: Mathematical Modelmentioning

confidence: 99%

“…It can be observed that the absolute value of the overpotential reduces firstly and then increases as SOC becomes larger, and the same tendency has been reported before. 5 It has the relatively low value at moderate SOC and becomes larger at the beginning and ending of charge-discharge cycle due to the reactive ion insufficiency. Moreover, the overpotential of the battery with the HIFF and THIFF is lower than that of the IFF, and battery with the Entropy change associated with reaction in equation ( 2) THIFF shows lowest overpotential.…”

Section: Terms Positive Electrodementioning

confidence: 99%

“…The continuously innovating flow channel design is indispensable for the efficient mass transfer and achieving lower pressure drop. 5 Aiming to reduce pressure loss and enhance mass transfer, various flow field designs including parallel flow field (PFF), serpentine flow field (SFF), and interdigitated flow field (IFF) have been developed to replace the conventional flow-through structure. [6][7][8] The published works showed that PFF is not as good as the SFF and IFF types in distributing the reactive ions within porous electrode due to the involving extra larger polarization overpotential, while the SFF and IFF have got more attention and showed comparative advantages.…”

mentioning

confidence: 99%

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Numerical Simulation of Flow Field Structure of Vanadium Redox Flow Battery and its Optimization on Mass Transfer Performance

Zhang,

Liu,

Shi

et al. 2024

J. Electrochem. Soc.

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The structural design of the flow channel of a redox flow battery directly affects ion transport efficiency, electrode overpotential, and stack performance during charge-discharge cycles. A tapered hierarchical interdigitated flow field design that has independent flow channel structures for different levels of flow was developed in this work. Especially, the secondary branch channels are the tapered type and the corresponding cross-sections are gradually reduced along the flow direction, which is beneficial for improving the flow rate at the end of channels and enhancing mass transfer. The performances of a vanadium redox flow battery with interdigitated flow field, hierarchical interdigitated flow field, and tapered hierarchical interdigitated flow field were evaluated through 3D numerical model. The results showed that at 240 mA/cm2 and 6 mL/s, the pump-based efficiency of the hierarchical interdigitated flow field increased by 4%-7% compared with the interdigitated flow field. Furthermore, the pump-based efficiency with tapered hierarchical interdigitated flow field increased by 1.6%-3% compared with the hierarchical interdigitated flow field. This indicates that the tapered hierarchical interdigitated flow field shows further advantages in redox flow battery applications.

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“…Therefore, EE is considered an important indicator of battery performance. 14,15 The results of the literature analysis indicate that the primary factors that affect battery EE are:…”

mentioning

confidence: 99%

Experimental Study on the Effect of Operating Conditions on the Efficiency of Vanadium Redox Flow Battery

Huang,

Liu,

Xie

et al. 2023

J. Electrochem. Soc.

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The operating conditions can have a negative impact on the efficiency of a vanadium redox flow battery (VRFB), and it is therefore important to systematically study how these conditions affect battery efficiency. In the experiment, various operating parameters such as charge/discharge cut-off voltage, flow rate, membrane thickness, current density, and shelving time are selected to evaluate their impact on battery efficiency. The experimental results indicate that increasing the range of the cut-off voltage reduces the battery’s energy efficiency. Additionally, both coulomb efficiency and energy efficiency improve as flow rate increases, but these efficiencies decline after reaching a critical value. Increasing the thickness of the ion conduction membrane enhances its effectiveness in preventing the crossing of vanadium ions, resulting in lower capacity loss. Furthermore, an increase in current density intensifies ohmic polarization and concentration polarization, leading to a decrease in energy efficiency.

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Effect of variable cross-section electrode on the battery performance of all-vanadium redox flow battery

Cited by 11 publications

References 30 publications

Beyond conventional batteries: a review on semi-solid and redox targeting flow batteries-LiFePO₄ as a case study

Beyond conventional batteries: a review on semi-solid and redox targeting flow batteries-LiFePO₄ as a case study

Numerical Simulation of Flow Field Structure of Vanadium Redox Flow Battery and its Optimization on Mass Transfer Performance

Experimental Study on the Effect of Operating Conditions on the Efficiency of Vanadium Redox Flow Battery

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Effect of variable cross-section electrode on the battery performance of all-vanadium redox flow battery

Cited by 11 publications

References 30 publications

Beyond conventional batteries: a review on semi-solid and redox targeting flow batteries-LiFePO4 as a case study

Beyond conventional batteries: a review on semi-solid and redox targeting flow batteries-LiFePO4 as a case study

Numerical Simulation of Flow Field Structure of Vanadium Redox Flow Battery and its Optimization on Mass Transfer Performance

Experimental Study on the Effect of Operating Conditions on the Efficiency of Vanadium Redox Flow Battery

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Product

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Beyond conventional batteries: a review on semi-solid and redox targeting flow batteries-LiFePO₄ as a case study

Beyond conventional batteries: a review on semi-solid and redox targeting flow batteries-LiFePO₄ as a case study