Mass transfer behavior in electrode and battery performance analysis of organic flow battery

Chu, Fengming; Li, Wen; Zhai, Dailong; Xiao, Guozhen; Yang, Guoan

doi:10.1093/ijlct/ctac026

Cited by 11 publications

(4 citation statements)

References 24 publications

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“…(3) The electrolytes are incompressible. (4) The other irrelevant reactions have been ignored . (5) Only the hydrogen ions can pass through the ion-exchange membrane.…”

Section: Modelsmentioning

confidence: 99%

Novel Interdigitated Flow Field with a Separated Inlet and Outlet for the Vanadium Redox Flow Battery

Chu,

Liu,

Shen

et al. 2023

Energy Fuels

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The vanadium redox flow battery (VRFB) is considered as a promising energy storage technology to solve the environmental problems of global warming. The optimizations should be carried out before the large-scale commercialization of the VRFB, and the flow field greatly affects the battery performance. In the paper, a two-sides interdigitated flow field (IFF) is designed for improving the mass transfer behaviors, and a three-dimensional numerical model is established to predict the charge–discharge process of the VRFB. The charge–discharge voltage, overpotential, concentration distribution, and uniformity factors are analyzed to evaluate the battery performance of different flow field designs (case 1, the conventional IFF; case 2, the two-sided IFF; and case 3, the two-sided IFF with a high contacting area). In comparison to cases 1 and 2, the VRFB with the case 3 design possesses the highest discharge voltage and the lowest charge voltage. For the distribution uniformity factor of V2+, case 2 is 5.5% higher than case 1 and case 3 is 17% higher than case 1. The two-sided IFF outputs the highest net power. Furthermore, case 3 can acquire 85.6% system efficiency, while the efficiency of case 1 is 84.5%, which shows that the two-sided IFF is more suitable for the large-scale VRFB.

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“…(3) The electrolytes are incompressible. (4) The other irrelevant reactions have been ignored . (5) Only the hydrogen ions can pass through the ion-exchange membrane.…”

Section: Modelsmentioning

confidence: 99%

Novel Interdigitated Flow Field with a Separated Inlet and Outlet for the Vanadium Redox Flow Battery

Chu,

Liu,

Shen

et al. 2023

Energy Fuels

Self Cite

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“…7,8 z E-mail: yangyue@ncepu.edu.cn; yangga@mail.buct.edu.cn Journal of The Electrochemical Society, 2022 169 070529 It is well accepted that the performance of flow battery is influenced by the hydromechanics, transport and the species distribution in the electrode, all of which are dependent on the flow field and electrode design. 9,10 Therefore, the investigations about the multi-species transport process were paid much attention by the researchers in the past decades. 11,12 Wang et al 13 established a non-uniform numerical model of a VRFB and investigated the effect of electrode compression on the battery performance.…”

Section: List Of Symbolsmentioning

confidence: 99%

Analysis of Battery Performance and Mass Transfer Behavior for Organic Redox Flow Battery with Different Flow Fields

Chu

Xiao

Xia

et al. 2022

J. Electrochem. Soc.

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How mass transfer performance limits the development of organic flow batteries, which are regarded as the emerging electrochemical energy storage technology, is unclear. Mass transfer behavior in the electrode is influenced by the flow fields, which is indispensable. A three-dimensional and steady numerical model of the organic flow battery is established and the results are verified by experimental data. The battery performance and mass transfer behaviors are analyzed under different flow field for the charge/discharge processes based on this model. Compared with other flow fields, the interdigital flow field can achieve the best charge-discharge performance, mainly due to the improvement distribution uniformity of active species. The average concentration of the interdigital flow field is 45.1% higher than that of the conventional flow field. The effects of the flow rates and initial concentration of electrolyte on the battery performance are investigated, and the results indicate that appropriate inlet flow rate can lead to the highest net discharge powers and power-based efficiency of the flow battery. Although increasing the initial concentration can improve the battery performance, the improvement is too slight when the concentration is high enough, which can lead to waste of the active species.

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“…Thus, the study of mass transfer enhancement has become the focus to improve the performance of flow battery. [20][21][22] In our previous work, a new negative electrolyte(1-DPAQCl) [23] was synthesized, which can design a novel neutral ORFB by combining with positive electrolyte FcNCl. [24] For the novel electrolyte material, the way that hydrophilic groups substituted at β-sites (away from the ketones/carbonyl) can achieve more excellent water-miscibility than superseded at αsites (close to the ketones/carbonyl).…”

Section: Introductionmentioning

confidence: 99%

“…studied the effects of different electrode configurations on the battery voltages and mass transfer, which showed that sector electrode could enhance discharge voltage of organic redox flow battery, improve the active species distribution and suffer the best power‐based efficiency. Thus, the study of mass transfer enhancement has become the focus to improve the performance of flow battery [20–22] …”

Section: Introductionmentioning

confidence: 99%

Mass Transfer Characteristic Analysis and Optimization of Flow Field for Neutral Organic Redox Flow Battery Based on 1‐DPAQCl

et al. 2022

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A novel negative electrolyte for organic redox flow battery has been synthesized, which has higher solubility in neutral solution. In order to promote the commercialization of the novel electrolyte(1-DPAQCl), a series of optimization should be carried out, in which the first is the operating conditions and mass transfer. A 3D steady state finite element model was established, which was compared with a lot of experimental data. The effects of only increasing the positive concentrations and only increasing the negative concentrations on the battery behaviors have been analyzed and the results showed that the setting of only increasing the positive concentrations can improve the discharge voltage up to 1.8 % and decrease the charging voltage by 1.21 %. The battery performances under four flow fields were investigated based on this model and the concentration uniformity factor of the four flow design were obtained. The results presented that the charge-discharge voltages of the interdigital flow field (IFF) was the best, which was followed by the rotary flow field (RFF) and serpentine flow field (SFF), the parallel flow field (PFF) was worst. The uniformity factors of IFF were 23.5 % higher than that of PFF and 12.5 % higher than that of SFF.

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Mass transfer behavior in electrode and battery performance analysis of organic flow battery

Cited by 11 publications

References 24 publications

Novel Interdigitated Flow Field with a Separated Inlet and Outlet for the Vanadium Redox Flow Battery

Novel Interdigitated Flow Field with a Separated Inlet and Outlet for the Vanadium Redox Flow Battery

Analysis of Battery Performance and Mass Transfer Behavior for Organic Redox Flow Battery with Different Flow Fields

Mass Transfer Characteristic Analysis and Optimization of Flow Field for Neutral Organic Redox Flow Battery Based on 1‐DPAQCl

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